 TPO membranes are single-ply roof membranes constructed from ethylene propylene rubber. They are designed to combine the durability of rubber with the proven performance of heat weldable seams. They have been tested as having excellent resistance to ozone, are algae-resistant, environmentally friendly and safe to install. TPO is highly resistant to tears, with good flexibility to allow for building movement. TPO's are available in white, light gray, and black with thicknesses of either 45 mil (.045"), 60 mil (.060"), 72 mil (.072”), or 80 mil (.080”).
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