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.

Dynabrade 50010 Collet, 3/8"-24 Female Thread, 1/4" Capacity, 3-Piece Collet
Dynabrade 90411 1/8" W x 24" L 220 Grit A/O DynaCut Belt, 50/pack
Dynabrade 90549 1/2" W x 44" L 120 Grit A/O DynaCut Belt, 50/pack
Dynabrade 79061 1/2" W x 24" L 60 Grit A/Z DynaCut Belt, 50/pack
Dynabrade 95216 Pin
Dynabrade 50296 5" Dia. Disc Backup Pad, Hard Density, 5/8"-11 Thread
Dynabrade 56323 3-7/8" x 5-5/8" Vacuum Dynabug II Disc Pad, Hook-Face, Short Nap
Dynabrade 82555 1/2" W x 18" L 60 Grit Ceramic DynaCut Belt, 50/pack
Dynabrade 56316 3" x 4-1/4" Vacuum Dynabug II Disc Pad, Hook-Face, Short Nap
Dynabrade 11399 Type 27 Wheel Mounting Adapter Kit
Dynabrade 90297 1/2" W x 18" L Coarse NWN DynaBrite Premium Belts, 10/pack
Dynabrade 15336 Rubber Drive Wheel
Dynabrade 92114 1/2" W x 12" L 180 Grit A/O DynaCut Belt, 50/pack
Dynabrade 90211 1/8" W x 18" L 60 Grit A/O DynaCut Belt, 50/pack
Dynabrade 95850 - 1/4" Female Coupler with 1/4" Female Plug Assembly
Dynabrade 11475 Dynabelter Abrasive Belt Tool, Standard Duty
Dynabrade 98580 Motor Tune-Up Kit for National Detroit Sander Models
Dynabrade 78424 4-1/2" Dia. x 3/8" Medium DynaBrite Surface Conditioning Disc, 25/pack
Dynabrade 93534 3" Mandrel for Sanding Stars, 3-48 Male Thread
Dynabrade 90368 3/4" W x 34" L 80 Grit A/O DynaCut Belt, 50/pack
Dynabrade 78055 1" W x 24" L Medium NWN DynaBrite Belt, 10/pack
Dynabrade 82489 6" Dia. x 100 Grit A/O Vacuum PSA Filmbac DynaCut Disc, 100/Pack
Dynabrade 14230 Rubber Drive Wheel
Dynabrade 79808 DynaBolt AO 4" x .035" x 3/8" T1 Cut-off Wheel, Box of 10 Discs
3M 05415, Heavy Duty Protective Tape 346, Tan, 4 in x 60 yd, 16.7 mil, 3 Roll/Case, 7010311705
Dynabrade 94112 7" Dynacut Diamond Segmented Rim Cut-Off Blade
Dynabrade 78709 3/8" x 3/4"-B52 Dynacut A/O Mounted Point, Vitrified, 5/pack
Dynabrade 79004 1/8" W x 12" L 80 Grit A/Z DynaCut Belt, 50/pack
Dynabrade 90499 1/2" W x 34" L 120 Grit A/O DynaCut Belt, 50/pack
Dynabrade 56355 3" x 4-1/4" Non-Vacuum Dynabug II Pad, Vinyl-Face
Dynabrade 55525 .3 hp Straight-Line, 6" Extended Die Grinder, Aluminum Housing 30,000 RPM, Rear Exhaust, 1/4" Collet
3M™ 72787, Calibration Kit 529-04-48, Large, 7000052154, 1 EA/Case 
