Sealing Solutions for Exteriors and Glass

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Expanding the Science of Sealing

Our conformable yet tight-bonding 3M™ Acrylic Foam Tapes (AFT) are great examples of our solutions in automotive sealing for OEMs. Look closer and you’ll find even more: adhesives that cure under OEM heating processes, adhesives formulated specifically for use on gasket and weatherstrip materials, primerless attachment tapes and the reduced-density benefits of 3M™ Glass Bubbles. Explore our expanding range of sealing tapes and technologies below.

Acrylic Foam Tapes

3M™ Acrylic Foam Tapes and Acrylic Plus Foam Tapes are go-to solutions for automotive sealing. These tapes have been developed specifically for attaching exterior trim and other parts to automotive paint surfaces. Conformable, viscoelastic foam cores provide excellent stress relaxation under high application loads and maintain tight bond lines under normal conditions. These viscoelastic properties allow the tapes to compensate for tolerances, provide uniform force distribution and help balance out thermal expansion – all critical for maintaining reliable seals.

3M™ Acrylic Plus Tape PT1100, Dark Gray, 1.14 mm
3M™ Acrylic Plus Tape PT1100 is developed specifically for attaching brackets and other rigid exterior parts to automotive substrates. It features a 1.14 mm acrylic foam core with a different adhesive on each side. The liner-side adhesive is formulated for very high initial and final adhesion to glass, as well as scratch and mar-resistant paint systems – excellent for applications requiring solid seals. The non-liner-side adhesive is great for bonding to automotive trim and other components.

3M™ Acrylic Foam Tape 5344, Gray, 1.14 mm
Great for sensor attachment, as well as attaching and sealing roof ditch and body side moldings, wheel flares and appliques, 3M™ Acrylic Foam Tape 5344 is a 1.14 mm tape that provides a balance of strength and conformability, which is excellent for sealing. It has two different adhesives. The liner-side adhesive is formulated for bonding to automotive paint surfaces where tight seals are required, and the non-liner side adhesive bonds to exterior trim parts.

3M™ Acrylic Plus Tape EX4311
Developed specifically for attaching and sealing exterior trim and other parts to low surface energy (LSE) automotive paint surfaces, this 1.14 mm tape features a liner-side adhesive that bonds to the most advanced LSE automotive clear coats, including those comprised of epoxy/acid powder, 2K urethane, acrylosilane and carbamate. The non-liner-side adhesive is formulated for high initial adhesion to a variety of automotive substrates and coatings.

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Acrylic Foam Tapes for Glass Trim

3M™ Acrylic Foam Tapes and Acrylic Plus Foam Tapes feature conformable, viscoelastic foam cores for stress relaxation under high application loads and maintain tight bond lines under normal conditions. These tapes have been developed specifically for attaching exterior trim and other parts to automotive paint surfaces and are ideal for trim attachment to glass. Their viscoelastic properties help absorb vibrations, provide uniform force distribution and help balance out thermal expansions, all suitable for maintaining seals between parts and glass.

3M™ Acrylic Plus Tape PT1100, Dark Gray, 1.14 mm
3M™ Acrylic Plus Tape PT1100 is developed specifically for attaching brackets and other rigid exterior parts to automotive substrates. It features a 1.14 mm acrylic foam core with a different adhesive on each side. The liner-side adhesive is formulated for very high initial and final adhesion to glass, as well as scratch- and mar-resistant paint systems. The non-liner-side adhesive is excellent for bonding and sealing automotive trim and other components to glass.

3M™ Acrylic Foam Tape 5314, Gray, 0.76 mm
Featuring a .76 mm acrylic foam core with two different adhesives, 3M™ Acrylic Foam Tape 5314 is ideal for attaching exterior trim and other parts to glass and automotive clear coat systems. The liner-side adhesive is formulated for very high initial and final adhesion to LSE substrates such as rigid clear coat paint systems. The non-liner-side adhesive is excellent for bonding and sealing automotive trim and other components to glass.

3M™ Acrylic Foam Tape 5344, Gray, 1.14 mm
Great for sensor attachment, as well as attaching roof ditch and body side moldings, wheel flares and appliques, 3M™ Acrylic Foam Tape 5344 is a 1.14 mm tape that provides a balance of strength and conformability. It has two different adhesives. The liner-side adhesive is formulated for bonding to automotive paint surfaces, and the non-liner-side adhesive is excellent for bonding and sealing automotive trim and other components to glass.

3M™ Acrylic Foam Tape 4257YCL, Gray, 0.38 mm
The ultra-thin .038 mm 3M™ Acrylic Foam Tape 4257YCL is excellent for attaching flexible parts to smooth, dry surfaces while creating a reliable seal. The tape is great for automotive applications where bonding surfaces are well matched or where the parts are thin and flexible.

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Acrylic Foam Tapes for Heat-Activated Applications

Our 3M™ Acrylic Foam Tape and 3M™ Acrylic Plus Tapes can really save time in sealing applications – their liner-side adhesives are pressure sensitive and easy to apply to a range of automotive substrates. Their non-liner-side adhesives are available heat-activated to cure under standard OEM processes without extra process steps. Conformable, viscoelastic foam cores provide stress relaxation under high application loads and maintain tight bond lines under normal conditions. These tapes have been developed specifically for bonding to ethylene propylene diene monomer/thermoplastic elastomers (EPDM/TPE) and many Santoprene® thermoplastic vulcanizate (TPV) materials.

3M™ Acrylic Plus Tape WT4112, Black, 1.2 mm
Ideal for attaching automotive weatherstrip and gasket seals, 3M™ Acrylic Plus Tape WT4112 features a heat-activated adhesive that is excellent for creating tight seals in applications using EPDM/TPE materials. It forms an immediate, durable bond without the need for adhesion promoters. The liner-side, pressure-sensitive adhesive is easy to apply and is formulated for adhesion to scratch-resistant paint systems. A 1.2 mil viscoelastic acrylic foam core provides excellent wet-out for seal integrity. The liner is suitable for heat-bond tabbing.

3M™ Acrylic Plus Tape ST1200, Black, 1.2 mm
Great for attaching automotive weatherstrip and gasket seals, 3M™ Acrylic Plus Tape ST1200 features a heat-activated adhesive that is excellent for creating tight seals in applications using EPDM/TPE materials. It forms an immediate, durable bond without the need for adhesion promoters. The liner-side, pressure-sensitive adhesive is easy to apply and is formulated for adhesion to rigid clear coat paint systems. A 1.2 mil viscoelastic acrylic foam core provides excellent wet-out for seal integrity. The liner is suitable for heat-bond tabbing.

3M™ Acrylic Foam Tape 5402H, Gray, 1.1 mm
Ideal for attaching automotive weatherstrip and gasket seals, 3M™ Acrylic Plus Tape 5402H features a heat-activated adhesive that is excellent for creating tight seals in applications using EPDM/TPE materials. It forms an immediate, durable bond without the need for adhesion promoters. The liner-side, pressure-sensitive adhesive is easy to apply and is formulated for high initial and final adhesion to a range of rigid clear coats, powder coats and other mar- and scratch-optimized auto paint systems. A 1.1 mil viscoelastic acrylic foam core provides excellent wet-out for seal integrity. The liner is suitable for heat-bond tabbing.

3M™ Acrylic Foam Tape 5403, Gray, 0.8 mm
Recommended where taping surface is smooth and a thin tape is necessary, 3M™ Acrylic Foam Tape 5403 features a .8 mil viscoelastic acrylic foam core, which provides excellent wet-out for seal integrity. A heat-activated adhesive forms an immediate, durable bond and seal to EPDM/TPE materials without the need for adhesion promoters. The liner-side pressure-sensitive adhesive is easy to apply and is designed for high initial and final bond to automotive trim and part materials. This adhesive is suitable for plastics with plasticizers, as well as traditional and newer automotive paints – including rigid clear coat systems. It may also be suitable for acrylonitrile butadiene styrene (ABS), polycarbonate (PC) and many flexible clear coats. The liner is suitable for heat-bond tabbing.

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Adhesion Promoters

Formulated specifically for use with 3M™ Acrylic Foam Tapes and 3M™ Acrylic Plus Tapes, our adhesion promoters improve the adhesion of automotive tape to a wide range of common automotive trim and part materials, including LSE plastics. They can be applied by gravity feed wipe, knurled roller, sprayer or felt-tipped or similar applicator, and they can be cleaned from most surfaces with common acetate solvent. They accept tape immediately after drying (typically less than 90 seconds).

3M™ Adhesion Promoter 4298UV
Our 3M™ Adhesion Promoter 4298UV is a liquid primer that works well with thermoplastic olefin (TPO), thermoplastic polyurethane (TPU) and polypropylene (PP). It also works well with nylon, glass (hidden and visible bond), ABS, acrylic, EPDM, TPV/TPE and PC – among others. It contains a fluorescent dye that makes it easily visible once applied, allowing for quick verification that coverage is complete and consistent. The liquid primer dries in 30 to 90 seconds for fast and efficient application.

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Glass Bubbles

Our cross-industry expertise allows 3M to provide advanced material technology to automotive OEMs and Tier suppliers. 3M™ Glass Bubbles are microscopic, hollow glass microspheres that feature an extremely high strength-to-density ratio. This material is supplied as a polymer additive that can replace heavier materials without sacrificing the integrity of the component. In fact, it can reduce density in plastics, composites and coatings by up to 50%. 3M™ Glass Bubbles can be used in injection molded parts and sheet molded composites (SMCs), ideal for lightweight door panels hoods and trunk lids. They are also commonly used in seam sealing and underbody coatings.

Please contact a 3M expert to discuss your specific application.

3M™ Glass Bubbles

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Need Help Finding the Right Solution?

3M is constantly working to meet the evolving challenges of automotive OEM and Tier suppliers worldwide. If you need help finding an existing solution or would like to talk about specific ideas you’re working on, get in touch with us.

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