Premium 125 mil thick mastic tape with self-healing properties for electrical insulation, padding, and moisture sealing up to 1,000V and 194°F, featuring UV resistance and easy-release liner
3M™ Scotch-Seal™ Mastic Tape Compound 2229 is a premium-grade, highly conformable tacky mastic tape designed for demanding electrical insulation, padding, and moisture-sealing applications. This 125 mil thick tape features a rubber backing with self-healing properties that restore sealing performance after minor cuts or punctures. The tacky mastic adhesive provides excellent adherence over irregular surfaces while maintaining stability across a wide temperature range from -4°F to 194°F (-20°C to 90°C). Engineered for industrial and occupational use, this tape is suitable for insulating electrical connections rated up to 1,000 volts when overwrapped with vinyl or rubber electrical tape, and is specifically designed for sealing high-voltage cable splice and termination accessories.
The tape features superior moisture resistance and UV resistance for outdoor and weather-exposed environments. Its thick mastic construction provides durable insulating and padding layers that protect components from environmental exposure, sharp edges, and mechanical stress points. The rubber-backed design offers excellent corrosion protection for cable end seals, duct seals, and exposed electrical hardware. With an easy-release liner for efficient installation and a shelf life of 5 years, this premium-grade tape maintains its adhesive properties and structural integrity in demanding industrial conditions.
Each roll measures 1 inch wide by 10 feet long (25.4 mm × 3 m) with a total thickness of 3.18 mm (125 mil). The product is RoHS 2011/65/EU compliant and manufactured in the USA. This industrial-grade tape is ideal for electrical contractors, maintenance professionals, and industrial facilities requiring reliable insulation and moisture sealing solutions for high-voltage applications and harsh environmental conditions.
Key Features
- Tacky mastic adhesive provides excellent adherence over irregular surfaces and complex contours
- Self-healing properties restore sealing performance after cuts or punctures
- Rated for electrical connections up to 1,000 volts when overwrapped with vinyl or rubber tape
- UV resistant with superior moisture resistance for outdoor and weather-exposed environments
- Maintains stability across wide temperature range from -4°F to 194°F (-20°C to 90°C)
- 125 mil thickness supports fast build-up and cushioning protection
- Rubber backing provides corrosion protection for cable end seals and electrical hardware
- Easy-release liner enables efficient installation in indoor and outdoor applications
- RoHS 2011/65/EU compliant for environmental and regulatory compliance
- 5-year shelf life with consistent adhesive performance in demanding conditions
Technical Specifications
| Specification |
Value |
| Product Type | Mastic Tape Compound |
| Brand | 3M Scotch-Seal |
| Model Number | 2229 |
| Part Number | 2229-1X10FT |
| UPC Code | 00054007503354 |
| 3M ID | 7000006032 |
| Overall Width (Imperial) | 1 inch |
| Overall Width (Metric) | 25.4 mm |
| Overall Length (Imperial) | 10 feet |
| Overall Length (Metric) | 3 meters |
| Tape Thickness (Imperial) | 125 mil |
| Tape Thickness (Metric) | 3.18 mm |
| Total Tape Thickness without Liner (Imperial) | 125 mil |
| Total Tape Thickness without Liner (Metric) | 3.18 mm |
| Product Color | Black |
| Tape Color (Initial) | Black |
| Adhesive Material | Mastic |
| Application Method | Apply by hand |
| Tape Grade | Premium |
| Product Form | Tape |
| Application Temperature To (Celsius) | 38°C |
| Application Temperature To (Fahrenheit) | -4°F to 194°F |
| Maximum Operating Temperature (Celsius) | 90°C |
| Maximum Operating Temperature (Fahrenheit) | 194°F |
| Minimum Operating Temperature | -4°F (-20°C) |
| UV Resistant | Yes |
| Voltage Rating | Up to 1,000 Volts |
| Shelf Life | 5 Years |
| Shelf Life (Months) | 60 months |
| Industries | Electrical, General Industrial |
| Regulatory Compliance | RoHS 2011/65/EU Compliant |
| Manufacturing Origin | USA |
| Package Quantity | 12 rolls per case |
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