Earthwool® 1000°F Pipe Insulation

Earthwool® 1000°F Pipe Insulation

Knauf Insulation Earthwool™ 1000°F Pipe Insulation is a molded, heavy-density, one-piece insulation made from inorganic glass fibers bonded with ECOSE® Technology . It is produced in 3’ lengths with or without a factory-applied jacket.

ASJ+ is the newest generation all-service jacket composed of aluminum foil, reinforced with a glass scrim bonded to a kraft paper interleaving with and outer film layer leaving no paper exposed. A matching ASJ+ butt strip is furnished in the carton for each section. The jacket is white, and the longitudinal lap of the jacket has a self-sealing adhesive.


Earthwool is the new benchmark that stands apart for its genuine sustainability, unsurpassed performance and consistently high product quality.

ECOSE® Technology

ECOSE Technology is a revolutionary binder based on rapidly renewable bio-based materials rather than non-renewable petroleum-based chemicals such as phenol, formaldehyde or acrylics. ECOSE Technology reduces Knauf Insulation binder embodied energy and contains no phenol, formaldehyde, acrylics or artificial colors found in traditional fiber glass insulation.


Earthwool 1000°F Pipe Insulation is used to insulate iron and copper piping in industrial applications and in commercial and institutional buildings. Earthwool 1000°F Pipe Insulation is suitable for hot, cold, concealed and exposed piping systems operating at temperatures from 0°F-1000°F (-18°C to 538°C). Additional weather protection is needed outdoors.

Features and Benefits

Energy Conservation

  • Offers excellent resistance to heat loss or gain, which saves energy and lowers operating costs.
  • A low thermal conductivity of .23 at 75°F (24°C).

Low-Cost Installation

  • ASJ+ faced pipe insulation has a self-sealing lap, which eliminates the need for staples, additional material and tools.
  • Fast, easy installation reduces labor costs.

Condensation Control

  • Installed properly, the foil vapor retarder and pressure-sensitive lap assure a positive vapor seal.

UL Classified

  • All Earthwool 1000°F Pipe Insulation, plain or jacketed, meets the fire and smoke safety requirements of most federal, state, and local building codes.

Easy Size Identification

  • Pipe size, wall thickness, and Proto 25/50-Rated PVC fitting cover size are printed in a repeat pattern along the longitudinal lap.
  • Easy identification at job site.
  • Simplifies restocking.

Glass Mineral Wool and Mold

Glass mineral wool insulation will not sustain mold growth. However, mold can grow on almost any material when it becomes wet and contaminated. Carefully inspect any insulation that has been exposed to water. If it shows any sign of mold it must be discarded. If the material is wet but shows no evidence of mold, it should be dried rapidly and thoroughly. If it shows signs of facing degradation from wetting, it should be replaced.


The chemical and physical properties of Knauf  Insulation Earthwool 1000°F Pipe Insulation represent typical average values determined in accordance with accepted test methods. The data is subject to normal manufacturing variations. The data is supplied as a technical service and is subject to change without notice. References to numerical flame spread ratings are not intended to reflect hazards presented by these or any other materials under actual fire conditions. Check with your Knauf Insulation sales representative to assure information is current.

GREENGUARD GoldKnauf Insulation Earthwool 1000°F Pipe Insulation with ECOSE® Technology products are certified for indoor air quality to UL GREENGUARD Gold standards.