Professional-grade 125 mil thick mastic tape for electrical insulation, moisture sealing, and padding. Rated up to 1,000V with self-healing properties and UV resistance. 10 pads per carton.
The 3M™ Scotch-Seal™ Mastic Tape Compound 2229 is a premium-grade, highly conformable tacky mastic tape designed specifically for demanding electrical insulation, padding, and moisture-sealing applications. This professional-grade tape features a thick 125 mil mastic construction with rubber backing that delivers excellent adhesion over irregular surfaces while maintaining exceptional stability across a wide temperature range from -40°C to 90°C. The tape is engineered with self-healing properties that allow it to restore sealing performance after minor cuts or punctures, making it ideal for long-term outdoor and weather-exposed applications.
With its easy-release liner, the 3M Scotch-Seal Tape 2229 ensures efficient installation in both indoor and outdoor environments. The tacky mastic adhesive provides superior moisture resistance and excellent adherence to metals, rubbers, synthetic cable insulations, and jackets. 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 with continuous operating temperatures up to 90°C.
The product is UV resistant and RoHS 2011/65/EU compliant, offering comprehensive corrosion protection for cable end seals, duct seals, and exposed electrical hardware. Each carton contains 10 pads with 40 pads per case, making it economical for both small-scale repairs and large industrial applications. This industrial-grade tape is manufactured in the USA and is intended exclusively for trained industrial and occupational customers for workplace use.
Key Features
- Tacky mastic adhesive provides excellent adherence over irregular surfaces
- Suitable for insulating electrical connections rated up to 1,000 volts when overwrapped with vinyl or rubber tape
- 125 mil thickness supports fast build-up and cushioning for mechanical protection
- Self-healing properties maintain seal integrity after cuts or punctures
- UV resistant with broad temperature range stability from -40°C to 90°C
- Easy-release liner for efficient installation in indoor and outdoor environments
- Provides corrosion protection for cable end seals and exposed electrical components
- RoHS 2011/65/EU compliant for environmental safety
Technical Specifications
| Specification |
Value |
| Product Name | 3M Scotch-Seal Mastic Tape Compound 2229 |
| Part Number | 2229-3.75X10FT |
| 3M ID | 7000132526 |
| UPC | 00054007503361 |
| Overall Width (Imperial) | 3.75 inches |
| Overall Width (Metric) | 95.3 mm |
| Overall Length (Imperial) | 3.75 feet |
| Overall Length (Metric) | 95.3 meters |
| Total Tape Thickness without Liner (Imperial) | 125 mil |
| Total Tape Thickness without Liner (Metric) | 3.18 mm |
| Backing Thickness (Imperial) | 125 mil |
| Backing Thickness (Metric) | 3.18 mm |
| Product Color | Black |
| Adhesive Material | Mastic |
| Product Form | Tape |
| Product Type | Mastic tape |
| Application Method | Apply by hand |
| Maximum Operating Temperature (Celsius) | 90°C |
| Maximum Operating Temperature (Fahrenheit) | 194°F |
| Application Temperature To (Celsius) | 38°C |
| Tape Grade | Professional |
| UV Resistant | Yes |
| Shelf Life | 5 years (60 months from date of manufacture) |
| Electrical Rating | Up to 1,000 volts when overwrapped with vinyl or rubber tape |
| Packaging | 10 pads per carton, 40 pads per case |
| Compliance | RoHS 2011/65/EU Compliant |
| Manufacturing Origin | USA |
| Brand | Scotch-Seal™ |
| Industries | Electrical, General Industrial |
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