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K-FLEX® INSUL-SHEET® is a flexible, closed-cell elastomeric sheet insulation product used to conserve energy and prevent condensation on large pipes, ducts (covers), vessels, tanks and equipment.




The product's closed-cell structure creates exceptional thermal properties (k-value of 0.245 at 75°F and wvt of 0.03 perm-in) that protect against moisture penetration and heat loss or gain within a -297°F to +220°F temperature range.

An easy-to-clean and uniquely tough protective skin on both sides provides a better surface to resist moisture and dirt.  The double-sided skin can be used with either side facing away from the applied surface, resulting in less waste if one side becomes damaged.

K-FLEX INSUL-SHEET® is available in 36” x 48” sheets or 48" wide rolls up to 2" thickness.  It is non-porous, non-fibrous and resists mold, fungal and bacterial growth.  For added protection, K-FLEX INSUL-SHEET® is protected with an EPA-approved antimicrobial agent. 

K-FLEX INSUL-SHEET® is GREENGUARD® certified under the Children and Schools classification, is approved through supervision by the Factory Mutual Research Corporation, and is 25/50-rated when tested to ASTM E 84 standards up to 2" thickness.

Property Value
ASTM D1056 Class 2B1 (B1, C1, F1, M)
Density 3-6 lb/ft3
25% Compression Resistance 2-4 psi
50% Compression Set 30% max.
Tensile Strength 30 psi min.
Elongation 100% min.
Tear Strength 4.5 lb/in min.
Thermal Conductivity 0.24 BTU-in/hr-ft2-oF
Flammability ASTM E84 25/50 (2")
Service Temperature -40oF to 220oF
Water Vapor Permeability <0.01 perm-in
Dimensions 2" (max.) x 54"





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