O.E.M. Heaters will be closed on Friday, June 28th for inventory. We will also be closed on Thursday, July 4th and Friday, July 5th for the holiday.
Industrial electric heat supply made fast, simple, and accurate

 866-685-4443 | Get in Touch Online

Insul-Lock Flexible 1/2-inch-thick Pipe Insulation

Insul-Lock is a 1/2-inch-thick, R3, flexible pipe insulation, ideal for use on pipes with heat trace cable installed. It is available for pipes with diameters from 1/2 in. through 3 in., in 1/4-in. increments.

Product highlights

  • Easy to install, with a precise fit
  • Double-seal technology:
    • Built-in pressure-sensitive adhesive, and
    • Built-in PVC overlap tape with acrylic adhesive
  • Reinforced with scrim on the seam surface
  • Environmentally friendly, CFC-free, flexible elastomeric thermal insulation
  • Non-porous, fiber-free, and resistant to mold growth
  • Resistant to moisture vapor flow
  • Compatible with heating cable and tapes


  • Operating temperature range: –70°F (–57°C) to 220°F (104°C)
  • R-value: 3
  • Color: Black
  • Length: Ships in increments of 6.0 feet (1.83 m)
  • Thickness: 0.5 in. (13 mm)
  • Density: 3 to 6 PCF (48 to 96 kg/m³)
  • Water vapor permeability:
    • Dry cup (elastomeric insulation): 0.03 perm/inch
    • Wet cup (glued seam with overlap): 0.12 perm/inch
  • Water absorption % (volume change): 0

If you have any questions about insulation, please don't hesitate to send us a contact form, e-mail us, or call us at (866) 685-4443.

Support Documents

Insul-Lock Pipe Insulation Spec Sheet