| HS Code | 756287 |
| Material | BADAMID PA12 H UV EX natural S2 (PA12, Dry) |
| Polymer Type | Polyamide 12 (PA12) |
| Density | 1.01 g/cm³ |
| Melting Point | 178 °C |
| Tensile Strength | 45 MPa |
| Tensile Modulus | 1600 MPa |
| Elongation At Break | 200 % |
| Flexural Modulus | 1400 MPa |
| Charpy Impact Notched 23 C | 7 kJ/m² |
| Heat Deflection Temperature 1 80 Mpa | 50 °C |
| Water Absorption 24h | 0.3 % |
| Typical Drying Temperature | 80 °C |
| Recommended Drying Time | 4 h |
| Mold Shrinkage | 0.7 - 1.0 % |
As an accredited Bada BADAMID PA12 H UV EX natural S2 PA12, Dry factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 25 kg moisture-proof sealed bags of Bada BADAMID PA12 H UV EX natural S2 PA12, dry UV-stabilized polyamide 12 granules. |
| Container Loading (20′ FCL) | 20′ FCL: Bada BADAMID PA12 H UV EX natural S2 PA12, dry, packed in sealed bags on pallets, securely stowed. |
| Shipping | Bada BADAMID PA12 H UV EX natural S2 is a dry, UV-stabilized polyamide 12 granulate. Ship in sealed, moisture-proof bags or containers, away from heat, sparks, and direct sunlight. No special hazard classification required; standard non-hazardous freight with dry, clean transport is suitable. Keep dry during transit and storage. |
| Storage | Store in original, unopened packaging in a cool, dry, well-ventilated area away from direct sunlight and heat sources. Protect from moisture and UV exposure. Keep containers tightly sealed when not in use to prevent water absorption. Maintain room temperature and moderate humidity. Follow manufacturer’s shelf life guidelines; use within recommended period to preserve performance. |
| Shelf Life | Store in a sealed, dry container away from sunlight. Shelf life is typically two years from manufacturing date under proper conditions. |
In truck and trailer air brake assemblies, the PA12 compound is extruded into non-reinforced monowall tube from 100% virgin BADAMID PA12 H UV EX natural S2 dry resin. The use of regrind is not recommended because the compounded UV stabilizer and heat stabilizer are not uniformly re-dispersed in post-industrial scrap, and local depletion causes premature environmental stress cracking at the tube outside diameter. Drying is performed in a desiccant hopper dryer at 80 °C with a dew point no higher than -40 °C for 4 h; the dry resin retains processability only if residual moisture stays below 0.10 wt%. Material exposed to ambient air at 50% RH for more than 20 min is re-dried before charging to the hopper because moisture absorption in PA12 shifts melt viscosity and generates surface splay in the vacuum calibration zone.
A 50 mm single-screw extruder with L/D 30:1, a barrier mixing section and a 3-zone vacuum vent is operated with a barrel temperature profile from 220 °C in the feed throat to 245 °C at the die head. The melt temperature measured at the screw tip is maintained between 230 °C and 240 °C. The vacuum sizing tank is held at 20 °C to 40 °C water temperature and a negative pressure of 0.02 MPa to 0.04 MPa, depending on the target outside diameter. Post-extrusion cutting is carried out after the tube has cooled below 50 °C to prevent flattening. Coil lengths of 100 m and 500 m are produced in 6.35 mm and 9.52 mm outside diameter sizes for push-to-connect fittings.
Qualification of the finished tube references SAE J844 Type A non-reinforced air brake tubing and ISO 7628-1; burst, collapse, cold impact and alcohol/water resistance tests are required. The UV stabilization package in the natural S2 grade permits outdoor storage of coiled tube, but the natural grade is not intended for continuous exposure as a bare hydraulic line because the absence of carbon black can shift surface degradation under long-term high-UV load. For black service lines, masterbatch addition is limited to 2 phr to 3 phr of a PA12-based carbon black concentrate to avoid reducing low-temperature impact resistance below the -40 °C threshold demanded by Nordic OEM specifications.
The transition from straight tube extrusion to corrugated conduit production imposes a melt strength limitation because the parison is vacuum-formed between moving mold half-blocks before the polymer front has solidified. In this grade, the high-viscosity H modifier provides the necessary zero-shear resistance, but the operating window is narrow. Melt temperature is held between 230 °C and 240 °C at the crosshead, and the die gap is opened 10% to 15% above the finished wall thickness to compensate for drawdown between die exit and corrugator infeed. If the melt temperature exceeds 245 °C, sagging produces wall thickness variation greater than ±0.1 mm at nominal 20 mm outside diameter, which leads to uneven compression resistance in the finished conduit.
The corrugator mold blocks are temperature-controlled between 60 °C and 80 °C. Insufficient block temperature causes surface marking and stress whitening at the corrugation roots, while excessive block temperature extends the contact time and can tear the partially solidified web. The natural S2 dry grade must be dried to a moisture content below 0.08 wt% to prevent steam bubbles in the corrugation crest. Black UV-stabilized conduit is produced by adding a PA12-based carbon black masterbatch at 2.0 wt% to 2.5 wt%; additions above 3.0 wt% generate a measurable loss in low-temperature Charpy impact under ISO 179-1/1eA and are not recommended for outdoor service below -20 °C.
Finished slit and unslit conduit from 10 mm to 50 mm nominal size is tested against IEC 61386-1 for compression and impact, and artificial weathering is performed according to ISO 4892-2 method A cycle 1. The product is cut into 50 m coils for solar tracker cable management and rail wayside harness protection. Because the natural S2 grade contains no additional flame retardant, conduit used inside rolling stock must be assessed against the fire performance requirements of the relevant national railway standard before substitution.
In optical loose-tube cable production, PA12 is extruded into thin-wall buffer tubes of 1.8 mm to 3.0 mm outside diameter and 0.20 mm to 0.30 mm wall thickness over a gel-filled fiber bundle. The principal process risk is post-extrusion shrinkage because residual orientation relaxes during thermal cycling and can attenuate the optical fiber. The tube is extruded through a precision crosshead die at a melt temperature of 235 °C to 245 °C and immediately vacuum-sized to lock the outside diameter. Line speeds between 150 m/min and 300 m/min are typical, but the upper range can generate die drool if the heat stabilizer package is over-sheared by excessive screw speed.
The natural S2 dry resin is dried to a moisture content below 0.06 wt% to prevent microbubbles in the thin wall; a single moisture bubble becomes a stress concentration point in the subsequent crush and impact test. Post-shrinkage is controlled by maintaining a sizing die water temperature of 20 °C to 30 °C and by annealing the tube in-line at 80 °C for at least 3 s. Finished buffer tubes are evaluated after 24 h at 85 °C for shrinkage below 0.5% in accordance with IEC 60794-1-22. Additional testing includes crush and kink resistance under IEC 60794-1-21. The resulting 12-fiber outdoor drop cable assembly uses the PA12 buffer tube for its low coefficient of friction and hydrocarbon resistance, but the natural grade should be protected from direct sunlight in open-trench installations unless covered by an outer UV-opaque cable jacket.
Coextruded fuel-vapor line jacketing differs from monowall air brake tube in the adhesion and permeation constraints that control the layer ratio. In a typical five-layer automotive fuel vapor line, the PA12 H UV EX natural S2 grade is placed as the outer protective layer over a tie resin and an EVOH barrier layer; it is not used as the hydrocarbon-wetted inner layer because natural S2 lacks the conductive carbon black loading required for electrostatic dissipation in fuel systems. The outer PA12 layer is maintained at 15 wt% to 20 wt% of the total wall thickness, corresponding to 0.20 mm to 0.35 mm for an 8 mm outside diameter vapor line.
Coextrusion is run on a five-extruder line with the PA12 outer layer at 235 °C to 245 °C, the tie layer at 200 °C to 210 °C, and the EVOH melt temperature kept below 220 °C to prevent degradation. The combined melt stream passes through a spiral mandrel die; the line speed is limited by the EVOH layer and the permissible interfacial shear, not by the PA12 outer layer. Layer adhesion is checked by a 90° peel test, and the finished tube is evaluated for hydrocarbon permeation under the regional fuel system specification covering CE10 test fuel. Because the natural S2 grade contains UV stabilizer, vapor tubes routed outside the cabin can withstand vehicle-level weathering during service-life validation, but black color masterbatch is added at 2 wt% to 3 wt% for underbody components where maximum UV opacity is required.
Off-road hydraulic hose covers are produced by crosshead extrusion of PA12 over a braided or spiral-wound reinforcement; the PA12 grade must fill the braid window without penetrating through to the inner rubber tube. The melt is maintained at 235 °C to 245 °C at the crosshead, and the extruder screw is starve-fed to control pressure at the die entry below 20 MPa. A pressure spike above 25 MPa forces the melt through the reinforcement interstices and compresses the inner HNBR tube, which can reduce the bore diameter below the minimum specified for the hose construction.
The jacket wall is controlled between 1.0 mm and 1.5 mm; thickness variation greater than ±0.1 mm creates bending asymmetry and kink failure during impulse testing. The high-viscosity H modifier in the natural S2 grade supports jacket integrity at high line speeds, but the absence of carbon black requires an external masterbatch addition of 2 phr to 3 phr for black covers used in agricultural and construction equipment. Qualification for hydraulic hose covers follows the relevant hose construction standard, such as SAE J517, and abrasion resistance is evaluated under the applicable abrasion method; PA12 typically exhibits a mass loss lower than comparable TPU covers under dry sand test conditions, but published data for this specific grade in that configuration is limited.
The PA12 cover is serviceable in continuous dry heat up to 100 °C; intermittent exposure to 125 °C is possible only at zero pressure because the cover modulus drops and the reinforcement may become exposed. The cover is not recommended for phosphate ester hydraulic fluids because PA12 absorbs polar fluids and undergoes plasticization; mineral oil-based fluids are preferred.
The natural S2 dry PA12 is extruded into precision pneumatic tubing from 4 mm to 12 mm outside diameter with wall thickness from 0.75 mm to 1.25 mm. Vacuum sizing is performed with a closed-loop water bath at 15 °C to 30 °C; the outside diameter tolerance is held to ±0.05 mm to guarantee leak-free push-in fitting performance. The melt temperature at the die is 235 °C to 245 °C, and the screw speed is set to maintain a melt pressure below 15 MPa at the screen pack. The dry resin is dried at 80 °C for 4 h to 6 h to a residual moisture below 0.08 wt%.
For solar tracker installations in desert environments, the UV-stabilized natural grade is tested under ISO 4892-2 method A cycle 1 for 1000 h. The acceptance criterion is set by the OEM; suppliers commonly require at least 70% retention of burst pressure at 23 °C, but published data for this specific grade in that configuration is limited. Above-ground desert service can raise tube surface temperature to 85 °C, and the working pressure must be derated to 50% of the 23 °C rating. The tube is qualified under ISO 14743 for push-in pneumatic connections, and the finished coils are cut into 25 m and 50 m lengths. Because the natural grade is unpigmented, black-stripe marking or full black masterbatch is applied at 2 wt% to 3 wt% for UV resistance in unshaded above-ground loops; the masterbatch carrier must be PA12 to prevent delamination at the fitting seal surface.
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Bada BADAMID PA12 H UV EX natural S2 PA12, Dry is a heat- and UV-stabilized polyamide 12 grade supplied as natural S2 granules and specified in a dry-moisture condition. The designation separates the base polymer PA12 from the stabilization and processing suffixes: H for heat stabilization, UV for ultraviolet stabilization, EX for extrusion-grade rheology, natural S2 for the unpigmented natural color and viscosity state, and Dry for low residual moisture. Polyamide 12 contains fewer amide groups per unit chain length than PA6 or PA66, which reduces equilibrium water absorption and improves dimensional stability in humid environments. Under ISO 62, saturation water absorption for PA12 is commonly reported near 1.2–1.6 %, whereas PA6 and PA66 can absorb 8–10 % and 7–9 %, respectively. The H UV EX grade is intended for extrusion processes such as cable protection conduit, pneumatic tubing, and outdoor profile lines where melt-phase residence, thermal aging, and ultraviolet exposure occur together. Because natural S2 is unpigmented, the final part can be colored with a PA12-compatible masterbatch; however, natural unpigmented PA12 is more transparent to UV than carbon-black-filled grades, so outdoor weathering must be validated on the final pigmented formulation.
Material selection for thin-wall tubing and cable sheathing requires a viscosity state that balances draw-down, melt strength, and surface finish. The S2 in the product name is manufacturer-specific and is not an ISO 1874-1 viscosity number. It must be read against the Bada lot certificate, which states the actual melt volume-flow rate or solution viscosity for the delivered batch. The EX suffix indicates that the molecular weight distribution is adjusted for extrusion rather than injection molding; this distinction matters when the compound is used in single-screw tubing lines with melt pump controls and high draw ratios. Published data for this specific configuration is limited, so the converter cannot transfer an injection-molding PA12 processing window directly to this grade without confirming melt-pressure stability and diameter control.
A standard PA12 extrusion grade may contain only a processing stabilizer and is not necessarily supplied with a low residual moisture specification. The H UV EX grade adds a heat stabilizer package for extended service temperature exposure and a UV stabilizer package for photo-oxidative resistance at the exposed surface. The Dry suffix means the granulate is supplied at a moisture level intended to reduce hydrolytic chain scission during plastication. It does not mean the material is permanently moisture-proof. Once the bag is opened, the granulate can regain water from ambient air. The natural S2 designation indicates unpigmented natural coloration; it is not a UV-opaque color and it does not provide the same weathering screening as carbon black.
The functional difference is therefore controlled by three independent variables: stabilizer concentration, moisture state, and viscosity state. In lot-to-lot production, the heat and UV stabilizer levels are fixed by the Bada formulation, but the actual residual moisture must be monitored on receipt because logistics and storage conditions can affect the Dry state. For extrusion operations, a lot that has been stored in damaged packaging should be re-dried even if the certificate states a dry-moisture content.
Desiccant drying, hopper residence, and dew-point control determine hydrolytic stability more than the Dry suffix alone. PA12 granulate with an initial moisture content below 0.10 wt% can regain water from ambient air at relative humidity above 50–60 %. For extrusion, the material should be maintained at 0.05–0.10 wt% residual moisture and transferred under dried air with a dew point below -20 °C. A desiccant dryer at 80–90 °C for 4–6 h is commonly used for PA12. Drying above 100 °C or for excessively long residence can yellow the natural S2 surface and should be avoided unless inert gas is used.
Polyamide 12 reaches equilibrium moisture near 0.5–0.7 % at 23 °C and 50 % RH, and saturation water absorption near 1.2–1.6 % per ISO 62. In the melt, absorbed water shifts the amide hydrolysis equilibrium toward molecular weight reduction, which lowers melt viscosity and can produce surface roughness, diameter variation, and reduced burst strength in extruded tubing. The Dry suffix reduces the initial moisture burden, but it cannot compensate for an open hopper or high-humidity production hall. Monitoring the moisture content at the feed throat, rather than only at receipt, is a more reliable control point.
Production experience on single-screw lines with grooved feed sections shows that moisture, regrind content, and hopper residence time create batch-to-batch variation in melt pressure. A gravimetric hopper with a dried-air sweep reduces moisture fluctuation. If the melt pressure varies by more than ±3 % at constant screw speed, the first diagnosis is moisture regain or feed bridging, not stabilizer distribution. In thin-wall pneumatic tubing with a wall thickness below 1 mm, moisture-related melt pressure instability is often visible as periodic diameter oscillation before the operator detects a change in barrel temperature.
Typical extrusion settings for PA12 compounds are melt temperatures of 200–240 °C, with the die temperature set 5–10 °C lower than the melt to control draw resonance and surface gloss. A single-screw extruder with L/D 24:1 to 30:1 and a compression ratio of 2.5:1 to 3.5:1 is adequate for ready-to-process dry granulate. If carbon black masterbatch is added at 2–5 wt% to the natural S2 grade, the screw should include a distributive mixing section or static mixer to prevent color streaks and local variation in UV protection. Melt residence above 260 °C should be minimized because thermal-oxidative degradation accelerates and the heat and UV stabilizer packages are consumed more rapidly.
Cable protection conduits and outdoor pneumatic tubing experience UV radiation, thermal cycling, and moisture ingress during storage and service. The H UV EX package is specified for the combined exposure where the component must survive outdoor storage before installation and then operate at elevated temperature. In black PA12 grades, carbon black provides a strong UV screen that protects the polymer surface. In natural S2, the UV stabilizer must absorb or quench ultraviolet radiation without the same opacity, so unpigmented parts are typically limited to indoor or short-term outdoor exposure unless a UV-opaque masterbatch is added. The final weathering class should be validated according to ISO 4892-2:2013, cycle 1 or an equivalent procedure, with retained tensile elongation, surface cracking, and color change as acceptance criteria.
Thermal-oxidative aging of PA12 is commonly evaluated by long-term heat aging at 100–120 °C using tensile and impact specimens according to ISO 527-2 and ISO 179-1. The heat stabilizer slows carbonyl formation and embrittlement of the exposed surface layer. However, published data for this specific Bada configuration is limited, and the final weathering performance depends on the color masterbatch and processing history. Natural unpigmented surfaces may show more visible discoloration during heat aging than pigmented grades because oxidative chromophores are not masked by carbon black or titanium dioxide.
PA12 retains ductility at low temperatures because the longer aliphatic segment between amide groups reduces chain stiffness and water sensitivity. Cold impact resistance and low moisture absorption are the main reasons PA12 is selected over PA6 or PA66 for coiled pneumatic tubing and cable sheathing installed at subzero temperatures. The melting temperature of PA12 is lower than that of PA66, and the continuous use temperature under mechanical load is therefore lower. PA12 is not the first choice for under-hood components that must sustain temperatures above 120–130 °C under load, where heat-stabilized PA66 or glass-reinforced PA6 may be required. The H UV EX grade specifies heat stabilization but does not alter the intrinsic melting temperature of the PA12 backbone.
The difference in water absorption arises from the amide group concentration. PA12 has a longer hydrocarbon chain between amide groups, so its saturation water absorption is near 1.2–1.6 % per ISO 62, compared with 8–10 % for PA6 and 7–9 % for PA66. Absorbed water plasticizes the amorphous phase, depresses the glass transition temperature, and reduces electrical insulation resistance. In humid applications, PA12 therefore has smaller dimensional and electrical property drift. This is why PA12 is specified for cable protection conduits, marine pneumatic lines, and outdoor fluid tubing where hydrolysis must remain low.
The low-temperature impact advantage is also chain-structure dependent. PA12 typically remains more ductile below 0 °C than unmodified PA6 or PA66. The H UV EX grade combines this low-temperature toughness with stabilizers for melt processing and outdoor storage. However, natural S2 must be protected from extended UV exposure unless the final part is pigmented, because unpigmented PA12 is more transparent to UV than black or white pigmented equivalents.
| Property | Test method | Representative range for preliminary selection |
|---|---|---|
| Density | ISO 1183-1 | 1.01–1.03 g/cm³ |
| Water absorption, saturation in water at 23 °C | ISO 62 | 1.2–1.6 % |
| Tensile yield stress | ISO 527-2/1B/50 | 35–45 MPa |
| Tensile modulus | ISO 527-2/1B/1 | 1300–1600 MPa |
| Nominal strain at break | ISO 527-2/1B/50 | >100 % for extruded tubing; lot-dependent |
| Charpy notched impact strength at 23 °C | ISO 179-1/1eA | 4–7 kJ/m² |
| Melting temperature | ISO 11357-3 | 175–180 °C |
| Vicat softening temperature, B50 | ISO 306 | 130–150 °C |
These ranges are representative of heat- and UV-stabilized PA12 extrusion compounds and are not lot-specific Bada datasheet values. Published data for this specific configuration is limited; the converter must obtain the Bada certificate for the delivered lot and use it for final design calculations.
Regrind addition in PA12 extrusion is common, but the natural S2 dry grade requires disciplined regrind handling. Use of more than 20–30 wt% regrind from thin-wall tubing can raise fines and moisture variability, especially if the regrind is not dried to 0.10 wt% before reintroduction. Heat- and UV-stabilized properties decline with repeated extrusion cycles; therefore, a maximum regrind percentage should be set according to the final article specification, not from visual appearance alone. Blending with PA6 or PA66 regrind should be avoided because the two polymers are not thermodynamically miscible and can produce weak weld lines and delamination in profile cross sections.
The H UV EX grade is also differentiated from plasticized PA12 by the absence of monomeric plasticizer in the designation. Plasticized PA12 grades may show higher flexibility and lower Shore D hardness, but plasticizer migration can affect fogging and surface adhesion. The H UV EX natural S2 dry grade is an unplasticized formulation for applications where dimensional stability and low migration are required. This does not exclude the converter from adding a PA12-compatible impact modifier or color concentrate, provided that the final property balance is revalidated.
Procurement of Bada BADAMID PA12 H UV EX natural S2 PA12, Dry must include the lot certificate, safety data sheet, and any regulatory declarations required by the final article. The base polymer is identified as PA12 under ISO 1043-1. Material certification may reference ISO 1874-1 designatory properties, but the manufacturer-specific S2 viscosity must be checked against the lot certificate rather than assumed from a generic PA12 data block. For electrical applications, comparative tracking index, volume resistivity, and dielectric strength are not intrinsic to PA12 alone; they depend on moisture content, pigmentation, and stabilizer package.
For European Union supply, the compound is subject to REACH Regulation (EC) No 1907/2006, including Article 33 communication obligations for substances of very high concern. For electrical and electronic equipment, the finished component falls under RoHS Directive 2011/65/EU if applicable; the natural S2 grade should be supported by supplier declarations for the restricted substances listed in Annex II. For repeated food-contact applications in the United States, PA12 may be covered as a nylon resin under 21 CFR 177.1500, but migration testing and end-use conditions must be evaluated because the H UV EX additive package may not be cleared for all food types.
Documents should be archived by lot number. The Dry state should be verified on receipt by moisture analysis, and the supplier certificate should record the residual moisture specification. If the material is stored in opened bags, the dry-state date cannot be extended without re-drying.
| Requirement | Standard or regulation | Application boundary |
|---|---|---|
| Polyamide identification | ISO 1043-1 | PA12 base polymer; suffixes are supplier-specific |
| Designatory properties | ISO 1874-1 | Lot-specific data block must be obtained from Bada |
| Restriction of hazardous substances | RoHS Directive 2011/65/EU, Annex II | Finished electrical/electronic component, not granulate alone |
| REACH communication | Regulation (EC) No 1907/2006, Article 33 | SVHC disclosure for articles supplied in the EU |
| Weathering exposure | ISO 4892-2:2013, cycle 1 | Final pigmented formulation; natural S2 alone may be insufficient for long outdoor exposure |
| Food-contact nylon resins | 21 CFR 177.1500 | Requires migration testing and end-use condition review |
PA12 has good resistance to many aliphatic hydrocarbons, oils, greases, and salt solutions, but it is not resistant to strong mineral acids, oxidizing agents, or certain chlorinated solvents at elevated temperatures. In fluid-contact applications, the H UV EX grade should be tested with the actual fluid at the maximum service temperature, because the heat and UV stabilizers can interact with aggressive media and affect surface degradation. If the final component is unpigmented natural S2, surface discoloration may appear earlier than in black grades, even when mechanical properties remain acceptable.
Extrusion of thin-wall tubing from the dry natural S2 grade requires a melt temperature profile that avoids melt fracture while preserving the stabilizer. In a 45 mm single-screw extruder with L/D 30:1, barrel zones are typically set in a rising profile from 180 °C near the feed throat to 230 °C in the metering zone, with the die at 220 °C. Draw-down ratio and screw speed are adjusted to maintain an outer diameter tolerance of ±0.05 mm for precision pneumatic tubing; this tolerance is more sensitive to moisture and melt-temperature fluctuation than to the Dry suffix. If the melt pressure fluctuates by more than ±3 %, moisture regain or feed bridging should be investigated before UV stabilizer distribution is considered.
Distribution of the UV stabilizer in a natural PA12 matrix is influenced by the extrusion screw mixing elements and by the viscosity state S2. Low-shear single-screw extrusion may not redistribute stabilizer that has been localized during granulation, but the Dry compound is supplied as ready-to-process granules. If converter adds a masterbatch at 2–5 wt%, the masterbatch carrier should be PA12-compatible and the screw should have a distributive mixing section. Incompatible carriers or wet masterbatch can create surface defects that initiate UV attack.
Qualification of the final article must include moisture analysis on incoming Dry granulate, melt-pressure stability on the extrusion line, and weathering validation on finished pigmented components. The natural S2 grade can be converted into black profiles with carbon black masterbatch, but the converter remains responsible for verifying that the final formulation meets the required outdoor exposure class under ISO 4892-2 and mechanical retention criteria from ISO 527-2 and ISO 179-1. If the application requires a UV-stabilized natural finish without carbon black, published data for this specific configuration is limited and lot-specific weathering trials are required.
