Reliable Seal on Hard-to-Stick-to Surfaces
We engineered our 3M™ Sealing Tape 8777 as a high-tack, translucent tape with a thin, proprietary film backing and high-tack acrylic adhesive available on a split liner. This is a self-adhered tape designed for sealing difficult-to-stick surfaces, even damp surfaces. Built with a waterproof membrane and proprietary backing, this tape seals around nails and staples to prevent moisture intrusion and establishes an air barrier. This sealing tape is UV-resistant (up to 12 months) and the adhesive will not melt or stain when exposed to heat. The tough, unique backing of this tape resists punctures and tears during application, but is also thin and conformable, conveniently fitting into corners. We gave this high tack tape a split release liner to allow for simple and fast application and accurate positioning of the tape. This product is compatible with many building sealants and has a unique acrylic pressure sensitive adhesive that aggressively adheres at low and high application temperature (0°F/-18°C to 150°F/66°C).
Recommended Applications
3M™ Sealing Tape 8777 can be used for a variety of applications, including:
- Deck joist and header board sealing
- Seal window and door openings against moisture intrusion
Resilient Waterproof Tape Solution
Designed for those hard-to-stick-to surfaces, 3M™ Sealing Tape 8777 offers a resilient and waterproof solution for tough applications. We built this tape to be durable in extreme temps and resistant to the wear and tear of harsh environments. For a strong sealing tape that is also thin and conformable, look no further than 3M™ Sealing Tape 8777 and enjoy the advantages of one of our many innovative tape designs prepared to meet your everyday challenges.

3M 03027, Scotch General Purpose Cloth Duct Tape 393, Silver, 48 mm x 54.8 m, 12 mil, 7000048964
3M 50019, Venture Tape Metallized Cloth Duct Tape 1502, Silver, 72 mm x 55 m (2.83 in x 60.1 yd), 7010296281
Dynabrade 95544 Gear Grease, 2.5oz. Tube
3M 71361, 641WY 1/4" X 24", 1200 Mesh Diamond Cloth Belt, 7010534916
3M 07047, Organic Vapor/Acid Gas Cartridge 6003/07047(AAD), 7000051849, 60 EA/Case
3M 64070, Contractor Grade Pro Strength Duct Tape 3979, Silver, 1.88 in x 60 yd, 7010375912
3M 97421, Aluminum Foil Tape 3380, Silver, 72 mm x 45 m, 3.25 mil, 7010375681
Dynabrade 96101 Dynabrade Air Lube 10W/NR 24 Per Box
3M 63738, Contractor Grade Multi-Use Duct Tape 2979, Silver, 1.88 in x 60 yd, 7010335692
3M 85652, Thermosetable Glass Cloth Tape 3650, White, 4 in x 60 yd, 8.3 mil, 7010373472
3M 49833, Multi-Purpose Duct Tape 3900, Black, 48 mm x 54.8 m, 7.7 mil, 7000148383
3M 53914, Performance Plus Duct Tape 8979N Nuclear Red, 48 mm x 54.8 m 12.1 mil, 7000049014, 24/ case 
