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 90411 1/8" W x 24" L 220 Grit A/O DynaCut Belt, 50/pack
Dynabrade 56355 3" x 4-1/4" Non-Vacuum Dynabug II Pad, Vinyl-Face
Dynabrade 79054 1/8" W x 24" L 80 Grit A/Z DynaCut Belt, 50/pack
Dynabrade 40610 Electric Dynafile II Abrasive Belt Tool
Dynabrade 54631 Cylinder Assembly
Dynabrade 61202 RaptorVac Pneumatic DrumVac Kit, Single Operator, General Purpose
Dynabrade 51450 5"-8" Dia. 7 Degree Offest Two-Hand Rotary Buffer, .7 hp, 3,400 RPM, Rear Exhaust, 5/8"-11 Spindle Thread
Dynabrade 51476 5"-8" Dia. Right-Angle Wet Rotary Sander, Basic, .7 HP, 0-3,100 RPM, 5/8"-11 Spindle Thread
Dynabrade 54972 Vane Set (5pk)
Dynabrade 14360 Pneumatic Pipe Belt Finisher
Dynabrade 91316 11-1/4" Dia. x 60 Grit A/O Non-Vacuum Hook-Face DynaCut Disc, 10/Box
Dynabrade 01480 Vane Set (4pk)
Dynabrade 10690 Filter/Regulator/Lubricator, FRL40, 1/2" NPTAssy.
Dynabrade 15336 Rubber Drive Wheel
Dynabrade 95756 Speed Control for Extreme Dynorbital Sanders
Dynabrade 53270 7" (180 mm) Dia. Right-Angle Disc Sander 
