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F4P Caution Barricade Tape - 3" x 1000 ft, English & Bilingual
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F4P
Starting at
$60.00
F4P Rubber Mastic Tape is a premium self-fusing, moisture-sealing tape engineered for superior electrical insulation and environmental protection. Designed with a durable rubber backing and pressure-sensitive mastic adhesive, it easily conforms around irregular surfaces and forms a long-lasting, weatherproof seal.
Ideal for insulating, padding, and sealing splices, connectors, and bus bars in both indoor and outdoor applications, this tape is UV-resistant, ozone-resistant, and suitable for above- and below-grade use.
Manufacturer Resources
See Spec Sheet
Product Specs
- Backing Material:
- Ethylene Propylene Rubber
- Color Options:
- Black
- Max Temperature:
- 266°F
- Product Type:
- Rubber Mastic Tape
- Product Group:
- Rubber
- Product Subgroup:
- Rubber Mastic Tape
- Product Material:
- Rubber
- Product Weight:
- 0.39 lbs
- Product Width:
- 2.5 inches
- Product Depth:
- 0.125 inches
F4P F4P RMT250-2 – Frequently Asked Questions
1) Will F4P rubber mastic tape seal a direct burial splice underground?
Yes. F4P Rubber Mastic Tape is rated for above- and below-grade use, so it works on direct burial splices. The ethylene propylene rubber backing with pressure-sensitive mastic self-fuses into a single moisture-sealing mass around the splice, and it's UV and ozone resistant for the portion of the run that stays above grade. Standard practice is to overwrap the mastic with a vinyl electrical tape for abrasion protection in a buried application.
2) Should I use rubber mastic tape or regular vinyl electrical tape on an outdoor splice?
Different jobs. Vinyl tape is a jacket, it does not fuse and water tracks under the edges over time. Rubber mastic self-fuses into one continuous rubber mass and seals moisture out, which is why it's the layer that goes directly on the conductor or connector outdoors and below grade. The usual build is mastic first for the seal and padding, then vinyl over it for mechanical and UV protection, though this mastic is itself UV and ozone resistant if it stays exposed.
3) Will rubber mastic tape conform around an irregular shape like a lug or a bolted bus connection?
That's what it's made for. The rubber backing and pressure-sensitive mastic stretch and mold around irregular surfaces, so it fills the voids around lug barrels, bolt heads, and bus bar joints instead of tenting over them the way a stiff tape does. Once wrapped under tension it fuses to itself and there is no seam for water to enter.
4) How hot can F4P rubber mastic tape get before it fails?
266 degrees F is the maximum temperature for F4P Rubber Mastic Tape. That covers normal conductor and connector operating temperatures on building power and control circuits, and it holds up on bus bar and connector padding where the joint runs warm. It is not a fire-stop or high-heat exhaust tape, so keep it off anything that will exceed 266F.
5) How thick is F4P rubber mastic tape, and how many wraps do I need over a connector?
The tape runs 0.125 inches thick and 2.5 inches wide. At an eighth of an inch per layer, a half-lapped wrap builds roughly a quarter inch of rubber per pass, so two passes over a connector gives you a substantial void-free body without a lot of material. The width is generous enough to cover most in-line splices and lug pads in a single spiral rather than stacking narrow turns.
6) Which length of F4P rubber mastic tape should I buy for a single splice versus a truck stock roll?
Two lengths, both 2.5 inches wide: a 2 ft roll and a 10 ft roll. The 2 ft is sized for one or two splices, the kind of thing you throw in a kit for a single repair. The 10 ft roll is the one for van stock or a job with a run of terminations, since a two-pass half-lapped wrap on a large connector eats a couple of feet on its own.
7) What color does F4P rubber mastic tape come in?
Black only, in both the 2 ft and 10 ft rolls. Black is the standard for the sealing layer, and if you need phase identification or color coding on the splice, that goes on the vinyl overwrap rather than the mastic.
How fast can I get the F4P F4P RMT250-2 delivered?
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Can I return it if it doesn’t work for me?
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Does the F4P F4P RMT250-2 come with a warranty?
Absolutely. The F4P F4P RMT250-2 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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