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™ 72787, Calibration Kit 529-04-48, Large, 7000052154, 1 EA/Case
ACS CX1250 Diamond Belt, 1/2" X 24" 125u
3M 71358, 641WY 1/4" X 24", 600 Mesh Diamond Cloth Belt, 7010534894
3M 20852, Scotch-Weld Epoxy Adhesive 2216, Translucent, Part B/A, 1 Pint Kit, 7010310194, 6/case
3M 01333, PSA Cloth Disc 348D, 60 X-weight, 3 in x NH, Die 300V, 7000118880
3M™ 37018, Supplied Air Respirator Vortex Cooling Assembly V-100/37018(AAD), 70070799013, 1 EA/Case
Dynabrade 53533 Cone or Plug Grinder (Triple Extension)
3M 60895, Impact Stripping Tape 500, Green, 2 in x 10 yd, 36 mil, 6 Rolls/Case, 7000001171
3M 53914, Performance Plus Duct Tape 8979N Nuclear Red, 48 mm x 54.8 m 12.1 mil, 7000049014, 24/ case
Standard Abrasives 530205, A/O Resin Fiber Disc, 7 in x 7/8 in 60, 7010310605
3M 54343, Particulate Respirator 8511, N95, 7000002056, 80 EA/Case
Dynabrade 64404 36" W x 60" L (914 mm W x 1,524 mm L) Metal Capture Downdraft Table, 230 V (AC), Side Exhaust
Norton 66261013403 - 3" X 1/2" Extra Coarse Grade Silicon Carbide Bear-Tex Rapid Strip TR Stripping Disc, 10 Each
Dynabrade 79170 1" W x 30" L 60 Grit Ceramic DynaCut Belt, 50/pack
3M 76625, Roloc Disc 777F, 80 YF-weight, TR, 1 in, Die R100N, 7000045621
3M 87449 Silver Depressed Center Grinding Wheel, T27 Quick Change, 9 in x 1/4 in x 5/8-11 Center Hub Thread, 7010409732, 20 per case
Dynabrade 77758 4-1/2" Dia. x 7/8" Center Hole, 60 Grit, Z/A, Type 27, DynaCut Flap Disc W/Fiberglass, 10/pack
3M 33349, 641WY 1/4" X 24", 220 Mesh Diamond Cloth Belt, 7010534919 
