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HydraShell™ Supreme
HydraShell Supreme is a lightweight, easy-to-install 100% synthetic underlayment for steeper slopes under asphalt shingles, synthetic shingles, cedar shakes and metal. With a unique four-layer construction that makes it 20 times stronger than #30 felt, HydraShell Supreme delivers superior lay-flat properties, won’t wrinkle or absorb water and stays flexible in cold weather. HydraShell Supreme has a Class A fire rating and is backed by a limited lifetime warranty.

