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Four rolls of black vinyl electrical tape 4 inches wide 33 yards long 20 mil thick

3M

3M 51 Vinyl Electrical Tape 4in 33yd 20mil Black PK4

SKU CH-ZWDH-S0JJQ

Vinyl electrical tape on four continuous 33-yard rolls, 4 inches wide and 20 mil thick, rated from -55 °F to 175 °F for corrosion protection and insulation

  • Reliable insulation in extreme cold down to -55 °F
  • Withstands continuous heat up to 175 °F without degradation
  • 20 mil thickness provides strong mechanical protection for cables
  • Corrosion-resistant vinyl shields wiring from moisture and chemicals
  • Four rolls of 33 3/8 yd each deliver long project coverage

Electrical tape for corrosion protection

This vinyl tape is designed for electrical insulation and corrosion protection on wiring and cable. It comes in a pack of four continuous rolls, each 4 inches wide and 33 3/8 yards long. The tape uses a rubber-based adhesive and is rated for performance between -55 and 175 degrees Fahrenheit. It carries the 3M and Scotchrap Series 51 branding.

Temperature range and thickness

The tape maintains adhesion and flexibility across a wide temperature span from minus 55 degrees Fahrenheit up to 175 degrees Fahrenheit. At 20 mil thick, it provides a substantial barrier against moisture and abrasion in normal use. The rubber adhesive bonds to itself and to cable jackets without requiring heat or special tools. No voltage rating is assigned by the manufacturer.

Four-roll pack convenience

The package contains four separate rolls so teams can keep one at each work station or vehicle. Each roll is unprinted and single-sided for consistent wrapping on irregular shapes. The continuous length reduces the need for frequent roll changes during large jobs. There is no bundled software or additional accessories included with this product.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $281.99
Pricier than about 85% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand name3M

Questions about this item

How do I wrap the 4-inch wide 3M 51 tape so the 20-mil thickness seals without gaps?

Stretch the vinyl gently as you spiral-wrap, overlapping each turn by half the width so the rubber adhesive fuses into a continuous corrosion-protection layer without air pockets.

When will the 3M 51 vinyl tape need replacement on a buried splice?

Replace it if the black jacket shows cracking, chalking or loss of adhesion after exposure beyond the -55 °F to 175 °F performance window or after mechanical damage disturbs the seal.

At what temperature does the 3M 51 tape stop holding its bond on a live conductor?

The rubber adhesive is rated to maintain performance up to 175 °F; sustained heat above that limit causes the bond to soften and the corrosion-protection seal to fail first.

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