This superior closed cell insulation is designed to deter heat flow and prevent condensation when properly installed. INSUL-LOCKĀ® Seam-Seal pipe insulation is pre-slit with a factory applied specially formulated bonding adhesive applied to both seam surfaces and comes with convenient built-in release liners which allow for easy installation. Ideal for applications such as refrigerant lines, cold water plumbing, roof drains and chilled water systems. INSUL-LOCKĀ® Seam-Seal pipe insulation is made from a UV resistant elastomeric blend. For moderate UV exposure, no additional protective coating needed. However, for severe UV exposure (rooftop applications) or where optimum performance is required, 374 Protective Coating or approved jacketing or cladding should be used.