Armacell Product Selector


Tube Insulation

Tubolit pipe insulation is an economical thermal solution from Armacell, the makers of ArmaFlex® and the world’s leading supplier of tubular polyethylene insulation. It reduces heat loss on hot water plumbing and heat gain on cold water plumbing systems.

Tubolit pipe insulation is a semi-slit, 25/50-rated, dark gray, closed-cell polyolefin/polyethylene thermal insulation. It is particularly effective for cost-efficient thermal insulation of domestic heating and plumbing lines. It is expanded without the use of CFC’s, HFC’s or HCFC’s.


The economical polyethylene insulation for residential heating and plumbing lines

Product Advantages

  • Available in the most frequently specified pipe sizes and thicknesses

  • Indoor Air Quality: Low VOC, fiber-free, non-particulating, formaldehyde-free insulation

  • GREENGUARD Gold Certified

  • ASTM E 84 25/50 rated

  • Reduces plumbing noise Resists mold and mildew

  • Cost effective

Application Areas

  • Domestic hot and cold water lines

  • Domestic heating and plumbing line

  • Acceptable for use on PEX

GREENGUARD_UL2818                  USGBC Member


Dark gray flexible polyolefin/polyethylene thermal insulation in tubular form


  • Wall Thickness (nominal): 3/8” 1/2”, 3/4” and 1” (10, 13, 19 and 25mm)

  • Inside Diameter, Tubular Form: 3/8” to 4” IPS ID (10mm to 114mm ID)

  • Length of Sections, Tubular Form: 6’ (1.83m)

Specifications Compliance:

  • MEA 6-02-M ASTM C 1427 Type 1

Approvals, Certifications, Compliances:

  • GREENGUARD Gold Certified

  • Manufactured without CFCs, HFCs, HCFCs, PBDEs, or Formaldehyde.

  • All Armacell facilities in North America are ISO 9001 certified.

For complete Specification details, download the product submittal sheet.


  • ArmaFlex 520 and 520 Black Adhesive – Air-drying, solvent-based contact adhesive for strong bonds and tight seams.

Armacell Manufacturing Locations

Did you know?

Armacell has 4 manufacturing facilities in the US and 1 in Canada. That means almost any product you order in North America is made in North America. Some exceptions apply.

Made In USA

© Armacell, 2014-2024 • 55 Vilcom Center Drive • Suite 200  • Chapel Hill, NC 27514 • tel 800 866 5638