Knauf Insulation - Earthwool® 1000° Pipe Insulation

Knauf Insulation is proud to be the first and only company in the world with an Environmental Product Declaration (EPD) on a pipe insulation product.

Category: commercial insulation | insulation jacketing | jackets...

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Knauf Insulation
One Knauf Drive
Shelbyville, IN 46176
Tel: (317) 398-4434
Fax: (317) 398-3675

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Earthwool® 1000° Pipe Insulation

Knauf Insulation is proud to be the first and only company in the world with an Environmental Product Declaration (EPD) on a pipe insulation product.

Knauf Insulation Earthwool™ 1000° Pipe Insulation is a molded, heavy-density, one-piece insulation made from inorganic glass strands 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 an 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 chemistry that enhances the sustainability of our products. The “binder” is the bond that holds our glass mineral wool product together and gives the product its shape and brown color. ECOSE Technology is a plant-based, sustainable chemistry that replaces the phenol/formaldehyde (PF) binder traditionally used in glass mineral wool products. Products using ECOSE technology are formaldehyde-free and have reduced global warming potential when compared to our products of the past.


Earthwool 1000° Pipe Insulation is used to insulate iron and copper piping in industrial applications and in commercial and institutional buildings. Earthwool 1000° 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° 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.


  • Professional finished appearance--dimple and wrinkle resistant.
  • Cleanable with a wet cloth and soapy water.
  • Moisture resistant to intermittent, short duration liquid water exposure, such as precipitation during construction phase.
  • ASJ+ has substantially less degradation and discoloration when exposed to UV.
  • ASJ+ meets ASTM C1136 Type I, II, III, IV and meets VIII based on the 75% better puncture resistance of ASJ+ (Mullen Burst).
  • Excellent SSL adhesion.

Indoor Air Quality

  • Certified by UL Environment for indoor air quality (IAQ) as low emitting products and where noted, have achieved the more stringent GREENGUARD Gold certification and verified to be formaldehyde-free.


  • Carbon negative: meaning Knauf Insulation products used for thermal insulating purposes recover the energy that it took to make them in just hours or a few days, depending on the application. Once installed, the product continues to save energy and reduce carbon generation as long as it is in place.

Earthwool glass mineral wool insulation contains three primary ingredients:

  • Sand, one of the world’s most abundant resources
  • Minimum 50% post-consumer recycled bottle glass
  • ECOSE Technology which reduces binder embodied energy by up to 70%
  • It is anticipated to reduce its Global Warming Potential (GWP) by approximately 4%, a significant reduction in our carbon footprint.
Specification Compliance

In U.S.:

  • ASTM C 547; Type I, Type IV
  • ASTM C 585
  • ASTM C 795
  • ASTM C 1136 (jackets); Type I, II, III, IV, VIII
  • HH-I-558C; Form D, Type III, Class 12; Class 13 (to 1000°F, 538°C)
  • GREENGUARD certified by UL Environment
  • GREENGUARD Gold certified by UL Environment
  • NFPA 90A and 90B
  • MIL-I-PRF-22344E (except pH requirements)
  • MIL-I-24244D
  • NRC Reg. Guide 1.36 (certification needs to be specified at time of order)

In Canada:

  • CAN/ULC S102-M88
  • CCG F1-304 (plain only)
  • CGSB 51-GP-9M
  • CGSB 51-GP-52M (jacket)
Technical Data

Surface Burning Characteristics

  • UL Classified.
  • Does not exceed 25 Flame Spread, 50 Smoke Developed when tested in accordance with ASTM E 84, CAN/ULC S102-M88, NFPA 255, and UL 723

Temperature Range (ASTM C 411)

  • Pipe operating temperatures from 0°F to 1000°F (-18°C to 538°C) at a recommended thickness of 6"

Water Vapor Permeance (ASTM E 96, Procedure A)

  • Jacket has a water vapor permeance of .02 perms or less.

Corrosiveness (ASTM C 665)

  • Does not accelerate corrosion on steel, copper or aluminum.

Corrosion (ASTM C 1617)

  • The corrosion rate in mils/yr will not exceed that of 1ppm chloride solution.

Microbial Growth (ASTM C 1338)

  • Does not promote microbial growth.

Water Vapor Sorption (ASTM C 1104)

  • Less than 0.2% by volume.

Linear Shrinkage (ASTM C 356)

  • Negligible.
ASJ+ Technical Data

Surface Burning Characteristics

  • UL Classified
  • Does not exceed 25 Flame Spread, 50 Smoke Developed when tested in accordance with ASTM E 84, CAN/ULC S 102-M88, NFPA 255 and UL 723.

Specification Compliance

  • ASTM C 1136 (jackets); Type I, II, III, IV, VIII

Water Vapor Transmission
(ASTM E 96, Procedure A)

  • Jacket has a water vapor permeance of .02 perms or less.

Water Vapor Sorption (ASTM C 1104)

  • Less than 0.2% by volume.
Product Forms and Sizes

Produced in 3' (914 mm) sections:

  • For iron pipe from 1/2" to 24" nominal pipe size (15 mm to 610 mm).
  • For copper tube from 5/8" to 61/8" (16 mm to 156 mm).
  • Wall thicknesses from 1/2" to 6" (13 mm to 152 mm) in single layer (for most sizes).
  • All insulation inner and outer diameters comply with ASTM C 585.
  • Four convenient carton sizes for easy ordering, inventory tracking, and storage.
  • Reinforced carton handles for strength and easy lifting.
  • Bar-coded cartons for accurate shipments and tracking.
  • Full product range stocked at distributors for fast availability.

Hot Pipe

  • May be installed while the system is in operation, at all temperatures up to 1000°F (538°C).
  • Knauf Insulation recommends, for insulation thicknesses greater than 6" (152 mm), the temperature must be increased from 500°F (260°C) to maximum temperature at a rate not exceeding 100°F (56°C) per hour.
  • During initial heat-up to operating temperatures above 350°F (177°C), a slight odor and some smoke may be given off as a portion of the bonding material used in the insulation begins to undergo a controlled decomposition.
  • If natural convection is not adequate in confined areas, forced ventilation should be provided in order to protect against any harmful fumes and vapors that might be generated.
  • Care must also be taken when using sealants, solvents, or flammable adhesives during installation.
  • A maximum of 6" (152 mm) wall thickness is recommended.

Cold Pipe

  • Use a continuous vapor retarder on piping operating below ambient temperatures.
  • Seal all joints, surfaces, seams, and fittings to prevent condensation. Use of staples is not recommended.
  • On below freezing applications, and in high abuse areas, the ASJ+ jacket shall be protected with a PVC vapor retarding outer jacket. In addition, exposed ends of insulation shall be sealed with vapor barrier mastic installed per the mastic manufacturer's instructions. Vapor seals at butt joints shall be applied at every fourth pipe section joint and at each fitting to isolate any water incursion.
  • On chilled water systems operating in high humidity conditions, it is recommended that the same guidelines be followed as listed above for below freezing applications.
  • Exterior hanger supports are recommended.

Outside Application

  • Do not expose pipe insulation to weather. It must be covered with appropriate jacketing, mastic, or vapor retardant adhesives.
  • All exposed surfaces must be protected. Proto® Indoor/Outdoor PVC Jacketing is recommended. See Knauf Insulation Guide Specifications for recommended PVC jacketing application guidelines.
  • Apply jacketing, mastics or vapor retardant adhesives per manufacturer's instructions. For metallic jackets, factory-applied and condensate retarders are recommended.


  • Keep adhesive and contact surfaces free from dirt and water, and immediately seal once adhesive is exposed.
  • Apply when ambient and insulation outer-surface temperatures are between 20°F and 130°F (-6.7°C and 54°C).
  • If stored below 20°F or above 130°F, allow insulation cartons to stand within recommended temperature range for 24 hours prior to application.
  • Do not store product below -20°F (-29°C) or above 150°F (66°C).
  • When using Knauf Insulation's SSL closure system, make sure the longitudinal and circumferential joints are properly sealed by rubbing the closure firmly with a squeegee.
  • When using Earthwool 1000° Pipe Insulation, the surface temperature of the insulation should be between -20°F and 150°F (-29°C and 66°C) during the life of the insulation.

Fittings and Hangers

  • Use Proto 25/50-Rated (ASTM E 84) PVC Fitting Covers, applying PVC fittings per Proto's Data Sheet.
  • Fittings should be insulated to same thickness and R-value as the adjoining insulation.
  • Apply fittings per manufacturer's instructions.
  • When required by specification, a hard insert of sufficient length should be used to avoid compression of the insulation.

Additional Precautions

  • Glass mineral wool may cause temporary skin irritation. Wear long-sleeved, loose-fitting clothing, head covering, gloves, and eye protection when handling and applying material.
  • Wash with soap and warm water after handling.
  • Wash work clothes separately and rinse washer.
  • Use a disposable mask/respirator designed for nuisance-type dusts where sensitivity to dust and airborne particles may cause irritation to the nose or throat.
Application Guidelines


Protect insulation from water damage or other abuse, welding sparks and open flame.
Cartons are not designed for outside storage.


  • Apply only on clean, dry surfaces.
  • Pipe or vessel should be tested and released before insulation is applied.

General Guidelines

  • All sections should be firmly butted.
  • Seal circumferential joint with a minimum 3" (76 mm) wide butt-strip.
  • Jackets, coatings, and adhesives should have a comparable F.H.C. rating.
  • ASJ+ may be painted. As with traditional ASJ, Knauf Insulation does not encourage the painting of ASJ+ because the application of any paint may change the surface burning characteristics and will void the UL Classification and Knauf Insulation Limited Warranty. Where painting is necessary, use common water, oil, or solvent-based paints. All paints should be tested for compatibility and adhesion before use.
  • All piping should have continuous insulation.
  • Position longitudinal lap downward to avoid dirt and moisture infiltration.
  • Do not expose pipe insulation to excessive vibration or physical abuse.
  • Faced insulation should not have a facing temperature above 150°F (66°C).

SSL+ Installation Instructions:

  • To install SSL+, first remove the kraft release liner to expose adhesive.
  • Carefully align the jacketing. Starting in the center of the insulation section, begin initial SSL tack using pressure in the direction of the overlap. Again, starting in the center of the insulation section, with a plastic squeegee begin to apply firm pressure to the bonded lap area swiping from the center of the insulation section toward each end.

NOTE: After initial SSL+ adhesive tack, it is critical that the closure is not re-opened and repositioned on the facing. Doing so will weaken the adhesive and diminish bond strength.

Butt Strip Installation Instructions:

  • To install Butt Strips, remove the kraft release liner by separating the butt strip from the kraft using the convenient, easy release kiss cut.
  • Simply wrap the butt strip, centered around the joint, and apply firm pressure with a squeegee.

NOTE: After initial Butt Strip adhesive tack, it is critical that the closure is not re-opened and repositioned on the facing. Doing so will weaken the adhesive and diminish bond strength.

Recommended Thicknesses (ASHRAE 90.1-2010)

The minimum thicknesses are based on ASHRAE 90.1-2010 standards and do not necessarily represent the Economic Thickness of Insulation or the thickness required for proper condensation control. Rather, they serve as minimum recommendations for commercial applications. For recommended Economic Thickness, install according to Knauf Insulation or NAIMA 3E Plus programs or as specified.

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° 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 Certification

Knauf Insulation products with ECOSE Technology contain no phenol, formaldehyde, acrylics or artificial colors. These products are certified by UL Environment for indoor air quality (IAQ) as low emitting products and where noted, have achieved the more stringent GREENGUARD Gold certification and verified to be formaldehyde-free. For more information, visit:

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