When foam can't handle the heat, go with fiberglass insulation. It withstands temperatures hundreds of degrees hotter than rubber or polyethylene foam, so it's often used on hot water supply and steam lines.

Protect insulation from light impact and moisture with this durable PVC jacketing. When selecting size, use the OD of the insulation you are jacketing. Seal with sealant or tape (sold separately).

Our best pipe insulation for maintaining temperatures. Use it on long runs where temperatures must stay constant, such as in refrigeration systems or to move liquified natural gas. Polyisocyanurate insulation resists moisture, so it maintains its thermal performance and prevents corrosion underneath.

An economical choice, this insulation is ideal for light duty plumbing and HVAC. Like rubber foam insulation, it repels moisture to keep temperatures stable and protect pipes from corroding. However, it's less flexible.

Absorbs no moisture, so it’s immune to organic solvents, most acids, and corrosive environments. It's often used in chemical-processing systems and underground lines.