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 64404 36" W x 60" L (914 mm W x 1,524 mm L) Metal Capture Downdraft Table, 230 V (AC), Side Exhaust
3M 23354, Home Dust Mask, 8661P4-DC, 7100159312, 4 Each/Pack
3M Flatback Tape 2517, Medium Brown, 36 mm x 55 m, 6.5 mil, 24Rolls/Case, 7000088501
3M 21511, Filter Adapter 502, 7000001931, 100 EA/Case
3M 28022, 8210 Plus Performance Sanding and Fiberglass Respirator 8210PH3-DC, 7100200441, 3 each/pack
3M 17322, Versaflo Respiratory Helmet Assembly M-405, with Standard Visor and Shroud, 7100009447, 1 EA/Case
3M 37339, Versaflo Powered Air Purifying Respirator PAPR Assembly TR-613N, Std Battery, BT-30 Breathing Tube, HD Belt, 7100035757, 1 EA/Case
3M 37378, Versaflo Filter Cover TR-6800FC/37378(AAD), for TR-6820N Filter, 7100021247, 1 EA/Case
3M 94246, Versaflo Powered Air Purifying Respirator Heavy Duty Assembly TR-813N/94246(AAD), 7100150924, 1 EA/Case
3M 94250, Versaflo Powered Air Purifying Respirator Heavy Industry Kit TR-800-HIK, 7100150927, 1 EA/Case
3M 94249, Versaflo Powered Air Purifying Respirator Easy Clean Kit TR-800-ECK, 7100150926, 1 EA/Case
3M 37348, Versaflo High Capacity Battery TR-632/37348(AAD), for TR-600 PAPR, 7100035836, 1 EA/Case
3M 33274, Performance Multi-Purpose Respirator 62023P1-DC, 7010296017
3M 17249, Versaflo Economy Headcover, S-103S-20, Small/Medium, 7000127462, 20 EA/Case
3M 90478, Sanding and Fiberglass Respirator N95 Particulate, 8200H10-DC, 7100160237, 10 Each/Pack
3M 37347, Versaflo Standard Battery TR-630/37347(AAD), for TR-600 PAPR, 7100035835, 1 EA/Case
3M 94933, Paint Sanding Valved Respirator 8511P2-C-PS-WM, 7100157701, 2 Each/Pack
3M 66278, Replacement Particulate Filter 5P71-6, P95, 7010301693, 6/Box
3M 37005, Head Harness 6897/37005(AAD), 7000002035, 5 EA/Case
3M 76550, Sealed-Seam Respirator Hood H-610-5, Collar, 7000126317, 5 EA/Case
Dynabrade 53270 7" (180 mm) Dia. Right-Angle Disc Sander 