Professional-grade 125 mil mastic tape for electrical insulation, sealing, and padding. Rated to 1000V, self-healing, UV resistant, and suitable for temperatures up to 194°F. Easy-release liner for efficient installation.
The 3M™ Scotch-Seal™ Mastic Tape Compound 2229 is a premium 125 mil thick, highly conformable tacky mastic pad engineered for demanding sealing, insulating, and padding applications. Featuring a rubber backing and easy-release liner, this professional-grade tape delivers exceptional adhesion over irregular surfaces while maintaining stability across a wide temperature range from -4°F to 194°F (-20°C to 90°C). The tape is specifically designed for electrical connections rated up to 1000 volts when overwrapped with vinyl or rubber electrical tape, making it ideal for high-voltage cable splices and termination accessories in demanding industrial environments.
This self-healing mastic tape combines superior moisture resistance with UV protection, making it suitable for both indoor and outdoor applications. The tacky mastic adhesive adheres excellently to metals, rubbers, synthetic cable insulations, and jackets, while the rubber-backed construction provides corrosion protection for cable end seals, duct seals, and exposed electrical hardware. With a shelf life of 5 years and RoHS 2011/65/EU compliance, this tape is manufactured in the USA and meets stringent industrial standards for electrical and general industrial applications.
Each carton contains 10 pads measuring 2-1/2 inches by 3-3/4 inches, with 40 pads per case. The tape's self-healing properties help maintain seal integrity even after minor cuts or punctures, while the easy-release liner ensures efficient installation in challenging field conditions. Perfect for electrical workers, maintenance professionals, and industrial technicians requiring reliable insulation, padding, and moisture-sealing performance.
Key Features
- 125 mil thick tacky mastic adhesive for superior adherence on irregular surfaces
- Rated for electrical connections up to 1000 volts when overwrapped with vinyl or rubber tape
- Self-healing properties restore seal integrity after cuts or punctures
- UV resistant with moisture-sealing performance for outdoor applications
- Maintains stability across wide temperature range from -4°F to 194°F (-20°C to 90°C)
- Easy-release liner for efficient installation in field conditions
- Rubber-backed construction provides corrosion protection for electrical components
- Excellent adhesion to metals, rubbers, synthetic cable insulations, and jackets
Technical Specifications
| Specification |
Value |
| Product Name | 3M Scotch-Seal Mastic Tape Compound 2229 |
| Part Number | 2229-2.5X3.75IN |
| 3M ID | 7000132544 |
| UPC | 10054007413032 |
| Overall Width | 2.5 inches (63.5 mm) |
| Overall Length | 10 feet (3 meters) |
| Tape Thickness | 125 mil (3.18 mm) |
| Product Color | Black |
| Adhesive Material | Tacky Mastic |
| Backing Material | Rubber |
| Product Form | Tape Pads on Easy-Release Liner |
| Application Method | Apply by Hand |
| Electrical Rating | Up to 1000 Volts (when overwrapped with vinyl or rubber tape) |
| Maximum Operating Temperature | 194°F (90°C) |
| Application Temperature Range | -4°F to 90°C (-20°C to 38°C) |
| UV Resistant | Yes |
| Moisture Resistant | Yes |
| Self-Healing Properties | Yes |
| Shelf Life | 5 Years (60 Months from Date of Manufacture) |
| Packaging | 10 pads per carton, 40 pads per case |
| Pad Dimensions | 2-1/2 inches x 3-3/4 inches |
| Compliance | RoHS 2011/65/EU Compliant |
| Manufacturing Origin | USA |
| Brand | Scotch-Seal |
| Industry Applications | Electrical, General Industrial |
| Intended Use | Industrial/Occupational Use Only |
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