Professional-grade 125 mil mastic tape compound for electrical insulation, moisture sealing, and corrosion protection rated to 1000 volts with UV resistance and self-healing properties.
The 3M™ Scotch-Seal™ Mastic Tape Compound 2229 is a premium 125 mil thick, highly conformable tacky mastic pad designed for demanding electrical insulation, padding, and sealing applications. This professional-grade tape features a rubber backing and easy-release liner, making it ideal for protecting electrical connections, cable splices, and terminations from moisture, UV exposure, and environmental hazards. The tape is engineered to deliver excellent adhesion over irregular surfaces while maintaining superior stability across a wide temperature range from -4°F to 194°F (-20°C to 90°C).
This self-healing mastic tape provides reliable insulation for electrical connections rated up to 1,000 volts when overwrapped with vinyl or rubber electrical tape, and is suitable for high-voltage cable splice and termination accessories with continuous operating temperatures up to 90°C. The tacky mastic adhesive ensures strong surface contact with metals, rubbers, synthetic cable insulations, and jackets, while the thick construction provides durable cushioning and corrosion protection. Its UV-resistant formulation and moisture-sealing properties make it ideal for both indoor and outdoor applications in harsh industrial environments.
Each carton contains 25 pads measuring 3-3/4 inches by 3-3/4 inches, with a full case containing 100 pads. This product is RoHS 2011/65/EU compliant and manufactured in the USA, meeting rigorous industrial standards. The 5-year shelf life and proven performance make this tape an essential component for professional electrical maintenance, telecommunications, utilities, and industrial applications requiring reliable environmental protection and electrical safety.
Key Features
- 125 mil thick mastic construction provides durable insulating and padding layer
- Rated for electrical connections up to 1000 volts when overwrapped with vinyl or rubber tape
- Self-healing properties maintain seal integrity after cuts or punctures
- UV resistant formulation for outdoor and weather-exposed applications
- Excellent adhesion to metals, rubbers, synthetic cable insulations and jackets
- Temperature range from -4°F to 194°F (-20°C to 90°C)
- Easy-release liner supports efficient installation
- Tacky mastic adhesive conforms to irregular surfaces
- RoHS 2011/65/EU compliant
- 5-year shelf life
Technical Specifications
| Specification |
Value |
| Product Name | 3M Scotch-Seal Mastic Tape Compound 2229 |
| Part Number | 2229-3.75X3.75IN |
| 3M ID | 7010397013 |
| UPC | 00054007429197 |
| Overall Width (Imperial) | 3.75 inches |
| Overall Width (Metric) | 95.3 mm |
| Tape Thickness (Imperial) | 125 mil |
| Tape Thickness (Metric) | 3.18 mm |
| Product Color | Black |
| Adhesive Material | Mastic |
| Product Form | Tape Pads |
| Product Type | Mastic Tape |
| Backing Material | Rubber |
| Application Method | Apply by hand |
| Maximum Operating Temperature (Celsius) | 90°C |
| Maximum Operating Temperature (Fahrenheit) | 194°F |
| Application Temperature Range | -4°F to 194°F (-20°C to 90°C) |
| Electrical Rating | Up to 1000 volts (when overwrapped with vinyl or rubber tape) |
| UV Resistant | Yes |
| Self-Healing Properties | Yes |
| Shelf Life | 5 years |
| Shelf Life in Months | 60 months |
| Pads per Carton | 25 pads |
| Pads per Case | 100 pads |
| Liner Type | Easy-release liner |
| Regulatory Compliance | RoHS 2011/65/EU Compliant |
| Manufacturing Origin | USA |
| Brand | Scotch-Seal |
| Industries | Electrical, General Industrial |
| Applications | Electrical insulation, moisture sealing, padding, corrosion protection, cable splice and termination |
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