Armacell Product Selector

NH ArmaFlex

Non-halogen Insulation in Tubes, Sheets and Rolls

NH ArmaFlex was specially developed by Armacell to minimize the density of smoke in a fire event and eliminate corrosive acid gases from combustion. NH ArmaFlex will not carry a progressive flame, and is formulated without chlorine, bromines, or PVC.

NH ArmaFlex is a non-halogen elastomeric insulation developed for sweat control in environments that require specific protection against smoke containing acid gases. It is the first non-halogen flexible insulation introduced for use on ships.


The first non-halogen flexible insulation introduced for use on ships.

Product Advantages

  • Non-halogen formula

  • Contains no chlorine, bromines, or PVC

  • Reduced smoke density in event of a fire

  • No corrosive acid gases from combustion

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

  • GREENGUARD Gold Certified

  • Closed-cell foam structure prevents moisture wicking and eliminates need for additional vapor retarder

Application Areas

NH ArmaFlex is used as insulation and protection for piping, tanks and air ducts, and to prevent stress corrosion with stainless steel pipes in the following applications:

  • U.S. Navy applications

  • General shipbuilding

  • IMO (International Maritime Organization)

  • Nuclear power plants

  • Anywhere non-halogen or chlorine-free materials are required

  • Exterior applications must be protected against radiation




NH ArmaFlex is a nonhalogen flexible elastomeric thermal insulation, gray in color, supplied as unslit tubing, sheets and rolls


  • See Submittal sheet for complete size options.

Specifications Compliance:

  • Electric Boat Corporation Specification EB 4013 Antisweat and Refrigerant Insulation Systems (Sheets and Tubes)

  • International Maritime Organization (IMO) SOLAS Requirements

  • United States Coast Guard Requirements*

  • NH ArmaFlex is currently specified for use on US Navy vessels.

  • UL-V-O and HF-1 File Number E55798

  • ASTM C534 Type 1 (Tubular) Grade 3, Type II (Sheet) Grade 3

  • ASTM C795

  • Nuclear Regulatory Commission Regulatory Guide 1.36

* Contact Armacell for details

Approvals, Certifications, Compliances:

  • GREENGUARD Gold Certified

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

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


Link to the NH ArmaFlex Tolerances and R-values table here.

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.

  • ArmaFlex Low VOC Spray Contact Adhesive – Low VOC adhesive in 27 pound aerosolized canisters

  • ArmaFlex WB Finish – Latex-based, UV resistant protective coating for indoor or outdoor applications

  • NH ArmaFlex Insulation Tape – black foam, pressure-sensitive seam tape

Armacell Manufacturing Locations

Did you know?

Armacell has 5 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, 2014-2021 • 55 Vilcom Center Drive • Suite 200  • Chapel Hill, NC 27514 • tel 800 866 5638 • email: