Armaflex light-weight, closed-cell foam pipe insulation is ideal for liquid pipe lines, in both iron and copper. Whether the liquid is hot or cold, this insulation forms a barrier to protect against both heat loss and condensation. Armaflex foam insulation is available in both 6â€™ lengths, which are 1/2â€ thick with an operating range from -30Â°F to 200Â°F, and in 3â€™ x 4â€™ sheets, which are either 1/2â€, 3/4", or 1" thick with an operating range from -30Â°F to 200Â°F. Armaflex 520 adhesive must be used to join the seams on traditional pipe and sheet insulation, although seal-sealing pipe insulation lengths are available. For extra exterior protection from the elements, apply Armaflexâ€™s Weather-Resistant Protective Finish.