Scotch Rubber Mastic Tape 2228 is a thick, self-fusing 65 mil rubber mastic tape engineered for moisture sealing, corrosion protection, and padding on cable splices rated up to 1000V. Its conformable construction adheres tightly to copper, aluminum, and power cable jacket materials, filling voids and irregular connection geometries to create a moisture-tight seal. Used as a standalone wrap or as an inner layer under vinyl tape, it provides primary insulation and mechanical protection for indoor and outdoor applications. Standard size is 1 in x 10 ft.
What is rubber mastic tape used for?
Tape 2228 is used to seal cable splices and connections against moisture and corrosion. It fills gaps around irregular splice shapes and is commonly applied as an inner moisture-sealing layer before an outer wrap of vinyl tape (such as Super 88) for a permanent, weatherproof joint.
Is Tape 2228 self-fusing?
Yes. The rubber mastic material bonds to itself as it is stretched and compressed, creating a void-free, moisture-tight seal without an adhesive bond to external surfaces.
What voltage is Tape 2228 rated for?
Tape 2228 provides primary insulation for cable and wire connections rated up to 1000V.
Do I need to use a vinyl tape over 2228?
For maximum durability and UV protection, the recommended system is to apply Tape 2228 as the inner moisture/mastic layer and then overwrap with Super 88 vinyl tape. 2228 alone can be used for indoor protected applications.
Can it be used outdoors?
Yes. 2228 offers UV and moisture resistance and is rated for both indoor and weather-exposed outdoor applications.
# 3M™ Scotch® Rubber Mastic Electrical Tape 2228 **Model:** `2228` **Brand:** 3M **Category:** Electrical Tape > Scotch Rubber Mastic Tape 2228 is a thick, self-fusing 65 mil rubber mastic tape engineered for moisture sealing, corrosion protection, and padding on cable splices rated up to 1000V. Its conformable construction adheres tightly to copper, aluminum, and power cable jacket materials, filling voids and irregular connection geometries to create a moisture-tight seal. Used as a standalone wrap or as an inner layer under vinyl tape, it provides primary insulation and mechanical protection for indoor and outdoor applications. Standard size is 1 in x 10 ft. ## Specifications | Attribute | Value | |---|---| | Product Type | Rubber Mastic Electrical Tape | | Voltage Rating V | 1,000 | | Thickness Mil | 65 | | Backing Material | Rubber mastic | | Adhesive Type | Self-fusing rubber mastic | | Available Widths In | 1, 2 | | Available Lengths Ft | 10 | | Self Fusing | Yes | | Ul Recognized | Yes | | Indoor Outdoor | Yes | | Barcode (UPC) | | Source: https://www.jaspecs.com/3m/electrical-tape/2228-3m-scotch-rubber-mastic-electrical-tape/