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3M Scotch Rubber Mastic Tape 2228 for Insulation and Sealing

  • Dual-Action Protection: Unlike standard tapes, Scotch 2228 acts as both a high-dielectric insulator and a physical moisture seal. The mastic base flows into irregular shapes, while the EPR backing ensures long-term UV resistance.

  • Rapid Build-Up: With a thickness of 1.65 mm (65 mils), it allows technicians to achieve the required insulation thickness with fewer wraps, significantly reducing labor time on-site.

  • Thermal Stability: Rated for continuous operation at 90°C and capable of handling emergency overloads up to 130°C, making it reliable for high-voltage cable splicing.

  • Self-Fusing Technology: Once applied, the tape fuses to itself, forming a solid mass that won't unravel even under extreme weather conditions.

  • Carrier Ethylene Propylene Rubber (EPR)
  • Adhesive Mastic, Rubber
  • Thickness 1.65mm
  • Dielectric Strength 500 V/mil
  • Long-term Operating Temperature -40°C to 90°C
  • Elongation at Break 1000%
  • Short-term Operating Temperature -40°C to 130°C
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product detail

3M™ Scotch® Rubber Mastic Tape 2228: The Industrial Standard for Weatherproofing & Insulation

Why Scotch™ 2228 is the Gold Standard for Moisture Sealing?
In demanding industrial environments, standard electrical tapes often fail when exposed to moisture and temperature fluctuations. The 3M Scotch 2228 Rubber Mastic Tape is a premium 65-mil thick, self-fusing tape designed specifically for rapid, high-build insulation. By combining an Ethylene Propylene Rubber (EPR) backing with a powerful, temperature-stable mastic adhesive, it creates an impenetrable barrier against water ingress and mechanical wear.

"As a specialized distributor, Kingzom provide volume-based pricing structures for utility-scale projects and industrial maintenance contracts. Reach out to our sales engineering department for a comprehensive commercial proposal and lead-time estimation.

Applications

Where to Use 3M Scotch 2228?

  1. Telecommunications: Ideal for sealing coaxial cable connections on cell towers where moisture is the primary enemy.

  2. Renewable Energy: Used in solar farms and wind turbine cabling for grounding and splice protection in outdoor exposed environments.

  3. Mining and Marine: Its rugged construction resists the harsh chemicals and salt spray found in heavy industrial and offshore applications.

  4. Substation Maintenance: Perfect for insulating bus bar connections and padding irregular-shaped bolts.

Scotch 2228 vs. Standard Vinyl Tape: What's the difference?
While vinyl tapes (like Super 33+) provide excellent abrasion resistance, they lack the "filling" capability of Scotch 2228. For any connection that is irregularly shaped or submerged/exposed to rain, the mastic layer of the 2228 is essential to fill gaps that vinyl tape cannot reach.

Expert Tip: For the ultimate professional finish, always overwrap Scotch 2228 with a layer of Scotch Super 33+ to provide additional mechanical protection and a non-tacky surface.

Q1: Can 3M 2228 be used on high-voltage cables?
A: Yes, it is rated for primary electrical insulation for cable and wire connections rated up to 1000V, and for padding bus bar connections up to 35kV.

Q2: Is the tape resistant to UV rays?
A: Absolutely. The EPR backing is designed for outdoor durability and offers excellent resistance to UV radiation and weathering.

Q3: Can I apply it in cold weather?
A: For best results, it is recommended to apply at temperatures above 0°C, though once applied, it maintains its seal across a wide temperature range.