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 11412, Roloc Disc 361F, 36 YF-weight, TR, 1 in, Die R100N, 7000045092
Insize 7230, SCRIBER, 6928640320064
3M 22404, Roloc Disc 361F, 80 YF-weight, TR, 3 in, Die R300V, 7000045100
Dynabrade 32013 Dry Hat Filter (for model 61204)
Dynabrade 15006 Mini-Dynafile II Abrasive Belt Tool Versatility Kit
3M 77197, Scotch-Brite™ Roloc™ Deburr and Finish PRO Unitized Wheel,TR, 3 in x 1/8 in x NH, 8C CRS+, 7100109130, 40/box
3M 28849, Unitized Wheel Mandrel 28849, 1-7/8 in x 1/4 in x 3/4 in x 1/2 in, 7100082548
3M 11419, Roloc Disc 361F, P240 XF-weight, TR, 2 in, Die R200P, 7000045105
Dynabrade 78174 2" Dia., Extra Coarse, NWN DynaBrite, TR Locking-Type Disc, 25/pack
Dynabrade 51753 .1 hp Straight-Line Extension Pencil Grinder, Rear Exhaust, 50,000 RPM, 1/8" Collet
Dynabrade 93696 3/8"-24 Female 3/8"-24 Male, 1-1/16" Length
3M 11414, Roloc Disc 361F, P120 XF-weight, TR, 1 in, Die R100N, 7000045104 
