We are manufacturer of waterproof underlayment, our quality is good and price is competitive, welcome to contact us.

GC1 Modified Bituminous Underlayment is a hybrid product created from asphaltic polymer and synthetic fabrics. Combining the best of both products, GC1 Modified Bituminous Underlayment boasts a lightweight material that is easy to carry, easy to install, but almost impossible for water to penetrate.

Characteristics:

Resists leaking and tearing

Resistance to slipping provides a safer installation

Lightweight, flexible material

Will not wrinkle or blow in the wind during installation

Wont stick to metal roofing-thermal stability in excess of 260F

Passes 110mph wind test and 4-hour water spray test with cap and roofing nails

Hybrid technology combines asphalted polymer and synthetic fabrics or superior performance

Left exposed, may protect a house for up to 4 months