Professional-grade translucent sealing tape with high-tack acrylic adhesive for difficult-to-stick surfaces, damp conditions, and extreme temperatures. UV-resistant, waterproof, and ideal for exterior construction sealing applications.
3M™ Sealing Tape 8777 is a premium translucent sealing tape specifically engineered for difficult-to-stick surfaces, including damp and moisture-prone areas. This high-performance tape features a proprietary film backing combined with high-tack acrylic adhesive available on a split liner for fast and accurate application. The self-adhered design creates a reliable moisture barrier and air seal, making it ideal for exterior construction applications such as deck joist sealing, header board sealing, and window and door opening seals against moisture intrusion.
The tape delivers exceptional durability and performance in extreme temperature conditions, with UV resistance up to 12 months and adhesive that remains stable without melting or staining when exposed to heat. The aggressive acrylic pressure-sensitive adhesive maintains strong adhesion across a wide temperature range from -40°F to 150°F (-18°C to 66°C), ensuring reliable performance in both cold and hot climates. The unique backing is thin and conformable, allowing it to fit conveniently into corners and tight spaces while the tough material resists punctures and tears during application.
Each case contains 4 rolls of 9-inch wide by 75-foot long tape with split release liner for convenient handling. Designed for industrial and occupational use, this sealing tape is compatible with many building sealants and provides a waterproof membrane that prevents moisture intrusion around nails, staples, and other penetrations. The heavy paper split liner enables simple positioning and fast application without waste or repositioning challenges.
Key Features
- Self-adhered design for sealing difficult-to-stick surfaces including damp surfaces
- UV-resistant for up to 12 months with heat-stable adhesive that does not melt or stain
- Waterproof membrane creates effective moisture barrier and air seal
- Aggressive acrylic adhesive performs at extreme temperatures from -40°F to 150°F
- Thin and conformable backing resists punctures and tears while fitting into corners
- Split release liner enables fast application with accurate positioning
- Proprietary film backing provides superior durability and reliability
- Compatible with many building sealants for comprehensive sealing solutions
Technical Specifications
| Specification |
Value |
| Product Number | 3M 8777 |
| 3M ID | 7010314182 |
| UPC Code | 00076308141844 |
| Width | 9 inches (228.6 mm) |
| Length | 75 feet (22.86 meters) |
| Quantity per Case | 4 rolls |
| Product Color | Tan |
| Backing Material | Proprietary Film |
| Backing Thickness | 5 mil (0.13 mm) |
| Adhesive Material | Acrylic |
| Adhesive Thickness | 0.13 mm |
| Adhesion Strength | 60 oz/in (66 N/100mm) |
| Primary Liner | Heavy Paper Split |
| Elongation | 7% |
| Minimum Operating Temperature | -40°F (-40°C) |
| Maximum Operating Temperature | 176°F (80°C) |
| Application Temperature Range | 0°F to 150°F (-18°C to 66°C) |
| UV Resistance | Up to 12 months |
| Shelf Life | 24 months from date of manufacture |
| Product Form | Roll |
| Primary Application | Exterior Side Panel Sealing |
| Brand | 3M™ |
| Use Type | Industrial/Occupational use only |
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