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K-FLEX® INSUL-TUBE® a flexible, closed-cell elastomeric tube insulation product used to conserve energy and prevent condensation on piping applications. The product's closed-cell structure creates exceptional thermal properties (k-value of 0.245 at 75F and wvt of .03 perm-in) that protect against moisture penetration in applications within a -297°F to +220°F temperature range. Widely used for its cold weather flexibility, durable skin surface, exacting manufacturing tolerances and lasting performance. It is available in 6’ lengths in a range of wall thicknesses ranging from 3/8" to 2” and is 25/50-rated, according to ASTM E-84 standards for surface burning characteristics of building materials, up to 2" wall thickness.