Gardner Bender HST-375R Heat Shrink Tubing 3/8x4 In.

Product Description

The GARDNER BENDER HST-375R is a thin-wall polyolefin heat shrink tubing designed for cable insulation, wire marking, and bundle management in electrical installations. It carries a 2:1 shrink ratio and a dielectric strength of 600 volts per mil, making it suitable for protecting conductors and connections from abrasion, moisture, and common fluids or solvents. The tubing is flame retardant and rated for continuous operation from -67 degrees F to 275 degrees F, with a shrink activation range of 250 degrees F to 480 degrees F. Electricians and low-voltage technicians are the primary installers of this product.

The HST-375R is suited for above-ground electrical applications where insulation, strain relief, or color-coded marking of conductors is required. Typical use cases include terminating wire harnesses, protecting splices, and bundling multiconductor runs in residential, commercial, and light industrial wiring work. Each piece measures 3/8 inch in diameter by 4 inches in length and is sold in packs with a minimum order quantity of 5.

Key Features

• 2:1 shrink ratio for secure, form-fitting coverage over conductors and splices
• Dielectric strength of 600 volts per mil for reliable electrical insulation
• Flame retardant thin-wall polyolefin construction
• Continuous operating range from -67 degrees F to 275 degrees F
• Resists common fluids, solvents, abrasion, and moisture
• Suitable for cable insulation, wire marking, and bundling applications

Compatibility

Designed as a general-purpose heat shrink sleeve for above-ground electrical wiring applications where 3/8-inch diameter thin-wall tubing with a 2:1 shrink ratio is required.

Installation Notes

Installation is typically performed by licensed electricians or low-voltage technicians. Shut off and lock out all circuits before applying heat shrink tubing to any conductor or splice. Use an appropriate heat gun rated for the required shrink temperature range; open flame is not recommended as it may damage the tubing or surrounding materials. This product is rated for above-ground use only and should not be used in direct burial or submerged applications.

Technical Specifications

• Material: Polyolefin (Thin-Wall)
• Diameter: 3/8 inches
• Length: 4 inches
• Shrink Ratio: 2:1
• Dielectric Strength: 600 V/Mil
• Continuous Operating Temperature: -67 degrees F / -55 degrees C to 275 degrees F / 135 degrees C
• Shrink Temperature Range: 250 degrees F / 120 degrees C to 480 degrees F / 250 degrees C
• Flame Retardant: Yes
• Application: Above Ground Use Only
• Weight: 0.032 pounds
• Unit of Measure: Pack
• Minimum Order Quantity: 5

Standard Information

• Brand: GARDNER BENDER
• Manufacturer Part Number: HST-375R