Available for metric-sized polypropylene pipe systems, including Aquatherm Blue Pipe® and Green Pipe®, Klo-Shure Insulation Couplings create vapor barrier at clamping points on insulated tube/pipe runs. Units allow for sections of insulation to be secured without having to remove clamp assembly while also maintaining integrity of insulation. USA-made couplings are UL 25/50 flame- and smoke-rated.