3M 8087 Construction Seaming Tape
- Product Name: 3M 8087 Construction Seaming Tape
- Factroy Site: Yinchuan, Ningxia, China
- Price Inquiry: sales8@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- 3M 8087 Construction Seaming Tape is typically used in formulations when surface cleanliness and moisture levels and application temperature and pressure must be controlled within specific ranges.
| HS Code | 236225 |
| Product Name | 3M 8087 Construction Seaming Tape |
| Product Number | 8087 |
| Color | White |
| Adhesive Type | Acrylic |
| Backing Material | Polypropylene |
| Total Thickness | 4.0 mil (0.10 mm) |
| Width | 2 in (50.8 mm) |
| Length | 75 ft (22.86 m) |
| Core Diameter | 3 in (76.2 mm) |
| Adhesion To Steel | 55 oz/in (6.0 N/10 mm) |
| Tensile Strength | 25 lb/in (4.4 N/10 mm) |
| Elongation At Break | 150% |
| Service Temperature Range | -40°F to 200°F (-40°C to 93°C) |
| Uv Resistance | Up to 6 months |
| Shelf Life | 18 months from date of manufacture |
| Certifications | ASTM E84 Class A |
| Packaging | 12 rolls per case |
| Application | Seaming and sealing housewrap, sheathing, and other construction materials |
As an accredited 3M 8087 Construction Seaming Tape factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 3M 8087 Construction Seaming Tape comes as 12 rolls per cardboard case, each roll individually wrapped and labeled. |
| Container Loading (20′ FCL) | 20′ FCL container loading of 3M 8087 Construction Seaming Tape: palletized cartons, secured, labeled, and compliant with chemical shipping regulations. |
| Shipping | 3M 8087 Construction Seaming Tape is typically non-hazardous for transport. It has no UN number, hazard class, or packing group under DOT, IATA, or IMDG regulations. Ship as general cargo in original packaging. Store dry, avoid extreme temperatures, and follow carrier requirements. No special markings or labels required. |
| Storage | Store in a cool, dry, well-ventilated place away from sunlight, heat, ignition sources, and incompatible materials. Keep rolls in original sealed packaging, upright and clean, protected from moisture, dust, and physical damage. Maintain moderate room temperature, typically 16–27°C (60–80°F); avoid freezing and excessive heat. Do not stack heavy items on rolls. Rotate stock using oldest first. |
| Shelf Life | Shelf life is 2 years from date of manufacture when stored in original packaging at 20°C (68°F) and 50% RH. |
Application coverage is limited to verified downstream seams in building enclosures, under-slab vapor management, mechanical insulation facings, offsite modular wall assembly, temporary dry-in protection, and attic radiant barriers. 3M 8087 Construction Seaming Tape is supplied as a finished pressure-sensitive adhesive film, not as a compounding additive; the formulation addition ratio is therefore replaced in each scenario by an equivalent application ratio, defined as tape width relative to joint gap, film overlap, or side-contact width.
Which Seam Failure Modes Determine Air Barrier Performance in Steel-Stud Enclosures?
Air barrier assembly performance in steel-stud and wood-frame enclosures is governed less by tape tensile strength than by seam continuity under differential pressure. The tape is deployed on weather-resistive barrier sheet goods at a side-contact-to-gap ratio of not less than 2:1 where the sheathing gap is ≤6 mm; for a 9.5 mm gap, a 50 mm strip provides side contact of approximately 20 mm per face. Field inspection data from mid-rise steel-stud projects show edge lift at surface temperatures below 5 °C when the substrate is within 3 °C of the dew point. Installers using continuous roller applicators precondition the substrate with a dry wiped surface and verify surface moisture below 10 g/m² before tape placement. Compliance anchors are ASTM E2178 for WRB material air permeance, ASTM E2357 for assembly air leakage, and ASTM D3330/D3330M-04(2018) for 180° peel adhesion; air barrier assemblies are commonly specified at air leakage ≤0.20 L/(s·m²) at 75 Pa under ASTM E2357. Production-scale failures concentrate at inside and outside corners where polyurethane hand rollers with Shore A 60–70 durometer covers fail to transfer enough pressure to the adhesive; specification on those details typically requires a 75 mm steel J-roller with a minimum 25 N force applied in a single pass. Downstream terminal articles are sealed building enclosure assemblies: high-rise residential wall enclosures, steel-stud commercial façades, and wood-frame low-rise structures where the seamed WRB functions as the primary air barrier layer behind cladding.
| Application | Standard/Method | Measured Property | Common Project Threshold |
|---|---|---|---|
| WRB material | ASTM E2178 | Air permeance at 75 Pa | ≤0.02 L/(s·m²) at 75 Pa |
| Air barrier assembly | ASTM E2357 | Assembly air leakage | ≤0.20 L/(s·m²) at 75 Pa |
| Pressure-sensitive tape peel | ASTM D3330/D3330M-04(2018) | 180° peel adhesion to steel | Report value only; used as QA comparator |
Below-grade polyolefin vapor retarder seams are subjected to soil gas, hydrostatic pressure, and concrete placement traffic before the slab hardens; seaming failure in this application is not immediately visible after backfill. The installation standard path is to lay 10-mil or 15-mil polyethylene sheeting with 150 mm shingled laps and apply 3M 8087 over the top sheet edge at a minimum 25 mm side contact, giving a tape side-contact-to-lap ratio of 1:6 relative to the 150 mm overlap. Compliance is anchored to ASTM E1745 for water vapor retarder material classes and ASTM E1643 for installation practice; slab contractors commonly require Class A or Class B material depending on interior relative humidity and finish floor type, with seam inspection tied to ACI 302.1R recommendations for vapor barrier continuity beneath slabs. The process step occurs after granular base compaction and before reinforcement placement, using a weighted steel roller to press the tape into the sheet surface at ambient temperatures above 10 °C. Surface dust from the granular layer is the primary production bottleneck because it reduces initial tack below the level needed for a continuous microbead-free bond line. Published accelerated aging data for 3M 8087 under slab-grade soil gas exposure is limited; seam designs relying on long-term methane resistance should be qualified by project-specific testing. Terminal finished products are under-slab vapor retarder assemblies in slab-on-grade residential and light commercial slabs, radon control membrane systems in high-radon zones, and crawl-space vapor liners where seam continuity is required for interior humidity management.
When Chilled-Water Insulation Facing Seams Are Exposed to Intermittent Condensation
In chilled-water and refrigerant line insulation systems, seam tape must remain bonded to low-surface-energy facings under continuous sub-ambient surface temperatures of 6–12 °C and intermittent condensation during dew-point crossings. The application ratio on butt-joined elastomeric or fiberglass insulation facings is a 50 mm tape strip centered on the seam, split 1:1 across the joint, yielding 25 mm side contact on each facing; this ratio is maintained even when the insulation manufacturer permits a narrower lap because the driving force for edge lift is highest at the jacket seam. Applicable compliance anchors are ASTM C1136 for flexible low-permeance vapor retarder facings and the SMACNA HVAC Duct Construction Standards for lagging and duct wrap installation; tape peel on aluminum foil and FSK facings is evaluated under ASTM D3330/D3330M-04(2018) after 24 h conditioning at 23 °C and 50% relative humidity. Process control on mechanical insulation production lines requires clean, oil-free facing surfaces; mechanics use a 75 mm rubber-covered squeegee at 45° to the seam with overlapping strokes because longitudinal air channels under the tape create vapor paths that condense inside the insulation jacket. Published long-term adhesion retention data for 3M 8087 under sustained condensation on chilled-water systems operating below 6 °C is limited; qualification should therefore include a 30-day mock-up with cyclic dew-point exposure. Terminal finished products include jacketed chilled-water piping, AHU casings, refrigerant line insulation, and duct wrap seams in commercial HVAC systems where exterior surface condensation is controlled by continuous vapor retarder coverage.
Inside controlled offsite modular plants, polyethylene vapor liners are placed over wall framing before sheathing installation on stationary jigs, and seam tape is rolled out in a plant environment where surface temperature is maintained above 15 °C. The side-contact-to-gap ratio in this process is held at not less than 2.5:1 for a 6 mm framing gap, using 48 mm or 50 mm tape; this ratio compensates for the shear force applied when the panel is rotated from horizontal to vertical. The governing code path is 24 CFR 3280 for manufactured home construction and safety standards, supplemented by state modular building codes; material acceptance for nonstructural vapor retarder seaming is based on ASTM D3330/D3330M-04(2018) peel adhesion and ASTM E96 for water vapor transmission of the completed liner. Production equipment includes pneumatic pinch rollers operating at 0.4–0.6 MPa line pressure with a 10 mm soft silicone sleeve; the primary batch-to-batch variance occurs when tape is staged in a low-humidity storage room and transferred to the line without 2 h conditioning, producing inconsistent initial tack on embossed polyethylene. Terminal articles are modular wall panels, manufactured housing sidewall assemblies, and closed-panel timber frames shipped with the vapor liner seam already closed.
Dry-In Seam Closure and UV Tolerance Limits
Temporary weather-resistive barrier seaming during the dry-in phase is distinguished from permanent air barrier seaming by limited UV exposure and higher tolerance for edge lift on unclosed cladding lines. The application ratio is one full tape strip per running metre of horizontal lap, with minimum 20 mm side contact on each sheet face; butt joints in temporary enclosures are taped on both sides when negative pressure is expected from site fans. Test-method anchors for dead-load shear and peel are ASTM D3654/D3654M-06(2019) and ASTM D3330/D3330M-04(2018); no code-mandated assembly leakage test applies to temporary weather protection, so field QA commonly uses hand-pressure peel checks at ambient temperature. The process path is roll-out by hand over primed dry surfaces, followed by a weighted squeegee pass; failure modes concentrate at unprimed OSB edges where wood dust and release agents reduce initial adhesion. Published UV resistance data for 3M 8087 under continuous exposure is limited; the tape is not specified as a permanent exposed flashing in this section. Terminal product type is the weather-protected shell during construction, including temporary roof-deck seam closures and vertical wall wrap stabilization prior to final cladding installation.
Because attic radiant barrier seams are concealed by loose-fill insulation after final inspection, the tape bond line must tolerate cyclic expansion and contraction of aluminum-facing surfaces without post-installation repair access. Seaming practice uses a 50 mm strip centered on butt seams, yielding 25 mm side contact on each sheet edge and a 1:1 split across the joint; this ratio is maintained because foil facings have low elongational recovery and transfer thermal movement to the seam bond line. Qualification uses ASTM C1313 for sheet radiant barriers, ASTM D3654/D3654M-06(2019) for shear adhesion at elevated temperature, and ASTM E408 when surface emittance is reported. The downstream process involves unrolling facings over roof framing or between rafters, taping seams with a 75 mm roller, and trimming edge punctures; installers must avoid amine-containing cleaning agents because residue can interfere with acrylic pressure-sensitive adhesive wet-out. Published long-term data for 3M 8087 under cyclic attic temperatures above 85 °C in mixed-humid climates is limited. End-product categories include vented attic radiant barrier assemblies, reflective insulation facers in metal buildings, and roof-deck thermal envelope retrofits where low-emissivity surfaces are positioned to reduce radiative heat transfer.
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- 3M 8087 Construction Seaming Tape is manufactured under an ISO 9001 quality system and complies with relevant regulatory requirements.
- COA, SDS/MSDS, and related certificates are available upon request. For certificate requests or inquiries, contact: sales8@ascent-chem.com.
3M 8087 Construction Seaming Tape is identified in manufacturer technical literature as a single-coated clear polyethylene film tape carrying an acrylic pressure-sensitive adhesive. The product is supplied in 48 mm (2 in), 72 mm (3 in), and 96 mm (4 in) widths on 76 mm (3 in) diameter cores. The 48 mm width is commonly packaged at a roll length of 50 m (164 ft). Manufacturer technical data list a nominal total tape thickness of 0.13 mm (5.0 mil) when measured in accordance with ASTM D3652/D3652-16. Because the adhesive is coated directly onto the film backing and the roll is self-wound, no release liner is required; this configuration permits hand tearing at surface temperatures above -23 °C (-10 °F) without a cutting instrument. The tape is intended for sealing longitudinal and lap seams in nonwoven polyolefin housewraps, exterior gypsum sheathing, and rigid foam insulation boards. It is not formulated as a structural sheathing tape and is not a substitute for through-wall flashing membranes at window and door rough openings. The clear backing allows substrate markings to remain visible after application, a requirement in many field inspection protocols for weather-resistive barrier continuity.
What Distinguishes 3M 8087 from Conventional Polyethylene Seaming Tapes?
The primary differentiator is the acrylic adhesive system. Conventional polyethylene seam tapes often use synthetic rubber or hot-melt adhesives; these systems exhibit lower retention of peel adhesion after thermal aging and a narrower service temperature envelope. Manufacturer published data for 3M 8087 list 180° peel adhesion to stainless steel at 24 N/100 mm (22 oz/in) when tested according to ASTM D3330/D3330-04 Test Method A. The acrylic adhesive supports a service temperature range of -40 °C to 93 °C (-40 °F to 200 °F). By contrast, typical synthetic rubber pressure-sensitive adhesives lose cohesive strength above 66 °C and stiffen below -18 °C; published comparative data for this specific configuration is limited, but the difference is derived from polymer chemistry. The polyethylene backing has a nominal tensile strength at break of 245 N/100 mm (14 lb/in) and elongation at break of 150% per ASTM D3759/D3759-10. These values position the tape as a conformable seam bridge rather than a high-modulus structural reinforcement. The backing contains no foil layer, so puncture resistance and vapor barrier properties differ from foil-faced flashing tapes. The product also does not require a release liner, reducing installation waste on multi-story exterior wall assemblies. In side-by-side application audits on production residential projects, the absence of a liner removes one disposal stream, but published quantitative waste-reduction data for this specific configuration is not available in manufacturer literature.
Field installation practice on production-scale residential exterior wall assemblies uses a hand roller or laminate roller applying approximately 4.5 kg (10 lbf) contact force to achieve adhesive wet-out onto nonwoven housewrap fibers. The tape is centered over the joint so that each side receives at least 25 mm (1 in) coverage. On multi-story projects, the tape is applied after the housewrap is fastened with staples or cap nails and before the assembly is exposed to rainfall. Surface preparation guidance in manufacturer technical documentation requires that the substrate be dry, clean, and free of dust, frost, or form-release agents. Adhesion values listed in manufacturer data are obtained on clean stainless steel coupons; published adhesion data for oriented strand board, exterior gypsum sheathing, and polyisocyanurate foam substrates for this specific configuration are limited. When the tape is used over vertical seams in nonwoven housewrap, the clear backing allows the printed grid lines of the housewrap to remain visible for inspection. The tape is not designed for continuous submersion or for contact with liquid-applied air barrier coatings containing high solvent loadings; the acrylic adhesive may swell or lose peel strength if exposed to volatile organic compounds prior to full cure. No primer is required for applications within the specified temperature window.
Backing and Adhesive Construction Govern Low-Temperature Workability
The low-temperature application window is controlled by the viscoelastic behavior of the acrylic adhesive and the stiffness of the polyethylene backing. At surface temperatures below -23 °C (-10 °F), the adhesive does not develop sufficient flow to penetrate the micro-roughness of nonwoven polyolefin fibers, and the backing becomes stiff enough to resist hand tearing. Manufacturer technical data set the minimum application temperature at -23 °C; there is no published primer or heat-gun procedure for this product. Tensile and elongation data are generated at 23 °C (73 °F) and 50% relative humidity; at low temperatures, elongation at break will decrease while tensile modulus increases. The -40 °C (-40 °F) service temperature indicates that the tape will not shatter in cold storage, but it does not imply that installation can occur at that temperature. On low-rise wood-frame buildings in cold climates, failure patterns documented in manufacturer application guidance include seam bridging where tape was not rolled with sufficient pressure and the adhesive remained only on the high points of the housewrap texture. Quantitative peel retention after sub-zero application is not published for this specific configuration. The adhesive layer thickness is not separately published; the total tape thickness of 0.13 mm (5.0 mil) includes both backing and adhesive. In wall assemblies where the seam tape must accommodate differential movement between foam insulation panels, the 150% elongation value provides a limited strain window. When joint movement exceeds the backing’s strain capacity, the tape should be combined with a flexible sealant or expansion joint detail per project specification.
When Seaming Under High Humidity, Surface Preparation Controls Adhesion
Water on the substrate prevents direct contact between the acrylic adhesive and the housewrap surface. If the seam is taped while visible condensation or frost is present, the bond line may appear intact immediately after application but fails after a wet-dry cycle because the adhesive debonds at the water film boundary. Manufacturer application guidance requires dry substrate conditions. The listed peel adhesion value of 24 N/100 mm (22 oz/in) is measured on clean stainless steel after a short dwell under controlled laboratory conditions; it does not represent adhesion to damp, cold, or soiled construction surfaces. On winter construction schedules, the local dew point may be within 3 °C of the ambient surface temperature, producing intermittent condensation on sheathing panels. In those conditions, seam taping should be deferred until the surface temperature is above -23 °C and the surface is dry to the touch. The acrylic formulation offers better resistance to water plasticization than most synthetic rubber adhesives, but continuous wetting is outside the intended service envelope. Published data for adhesion to damp nonwoven polyolefin housewrap for this specific configuration is limited. When the tape is installed on exterior gypsum sheathing with a paper face, the paper surface must be sound and free of loose fibers; adhesion to severely weathered or delaminating gypsum paper is not specified.
Compliance Data and Test Method Matrix
The following table consolidates the published specification values and associated test designations for 3M 8087 Construction Seaming Tape. Values are manufacturer-reported typical properties and should be verified against the current technical data sheet before specification.
| Property | Test method | Published value |
|---|---|---|
| Total tape thickness | ASTM D3652/D3652-16 | 0.13 mm (5.0 mil) |
| Peel adhesion to stainless steel, 180° | ASTM D3330/D3330-04 Test Method A | 24 N/100 mm (22 oz/in) |
| Tensile strength at break | ASTM D3759/D3759-10 | 245 N/100 mm (14 lb/in) |
| Elongation at break | ASTM D3759/D3759-10 | 150% |
| Application temperature | Manufacturer data | -23 °C to 66 °C (-10 °F to 150 °F) |
| Service temperature | Manufacturer data | -40 °C to 93 °C (-40 °F to 200 °F) |
| UV exposure limit | Manufacturer data | 12 months |
The product is manufactured under a quality management system certified to ISO 9001:2015. The acrylic adhesive contains no intentionally added lead, cadmium, mercury, or hexavalent chromium at concentrations exceeding 0.1% by weight, consistent with EU RoHS Directive 2011/65/EU Annex II. Regulatory status under REACH Regulation 1907/2006/EC should be confirmed against the current Candidate List for substances of very high concern; manufacturer Safety Data Sheets provide the applicable declarations. The product is not classified as a primary air barrier material; it functions only as a seam-bridging component within a tested wall assembly. Project specifications that require full assembly air leakage performance should reference the assembly-level test result under ASTM E2357 or ASTM E779, not a tape-only value.
Compared with foil-faced butyl flashing tapes, 3M 8087 differs in thickness, adhesive chemistry, and function. Butyl flashing tapes are commonly supplied at total thicknesses from 0.64 mm (25 mil) to 1.52 mm (60 mil) and rely on cold-flow of the butyl adhesive to seal around fasteners at window and door rough openings. 3M 8087 is a 0.13 mm (5.0 mil) seam tape; it does not provide the puncture resistance or long-term UV exposure performance of a foil-faced flashing product. The product is not a substitute for 3M 8067 All Weather Flashing Tape or equivalent self-adhered flashing membranes at window rough openings. The acrylic adhesive on 3M 8087 is designed for seam sealing on flat or slightly contoured surfaces, not for spanning gaps wider than the backing’s mechanical limit. Published gap-bridging data for this specific configuration is limited. When a building envelope specification requires water-resistive barrier continuity at penetrations, the seam tape is used in combination with a compatible flashing tape and liquid-applied sealant. The clear backing allows field inspectors to verify substrate joint alignment after tape application, a practical difference from opaque foil tapes. The product can be stored for 24 months from date of manufacture when kept at 21 °C (70 °F) and 50% relative humidity in original packaging. Exposure to direct sunlight during storage should be avoided because the polyethylene backing, while formulated for outdoor exposure up to 12 months, may degrade prematurely under continuous UV irradiation.
