3M Linerless Electrical Rubber Tape 2242, 15 ft

3M Linerless Electrical Rubber Tape 2242 carries a 600V rating, with a dielectric strength of 750 V/mil over a 30 mil (0.76 mm) tape thickness. That covers building wire splices and low-voltage motor leads. For medium-voltage splice work you need a tape rated for that class instead.

2242 is an insulating self-fusing rubber tape, not a jacketing tape. Its rubber-resin adhesive is self-fusing and the ethylene propylene rubber backing resists UV and heat, but standard practice is to build the splice with the rubber tape for insulation and overwrap with a vinyl electrical tape for mechanical and moisture protection. The application field for 2242 is insulation.

Two widths are offered: 3/4 in (MPN 7000058491) and 2 in (MPN 7000132759). The 3/4 in is the general-purpose size for conductor splices and irregular shapes; the 2 in covers large connectors, bus, and bulky splices in fewer passes. Both are 15 ft long per roll.

2242 meets ASTM D-4388 Type 1, 2 and 3, plus HH-I-553C, and is RoHS 2011/65/EU compliant. It is graded as a professional tape and made in the United States, which covers most domestic-content and spec-compliance questions on an institutional submittal.

No liner. 2242 is linerless, so you pull it off the roll and wrap straight onto the splice with no backing paper to strip and discard. The listed 30 mil thickness is the tape itself, measured without a liner.

Maximum operating temperature is 90 degrees C (194 degrees F), which lines up with 90 C rated building wire. For connections that run hotter than that, use a different tape.

Yes. The ethylene propylene rubber backing resists UV rays and heat, and the tape is listed as UV-resistant, so it is suitable for exposed and outdoor splice work within its 90 C limit. Outdoors it is still normally jacketed with a vinyl overwrap.

Each roll ships one roll per carton, 24 cartons per case, on a 1 in core. Roll length is 15 ft (4.6 m), so plan quantity on how many wraps your splice count needs.