Poly Shed Green Mineral Felt is manufactured using modified bitumen and polyester. It offers maximum durability and tear resistance which results in a lifetime of up to 3 times that of a standard grade felt. It is tough yet flexible which allows for easy fitting. Roof and gutter sealant is a premium quality butyl based sealant that provides instant and permanent weather-proofing. Suitable to apply as a felt lap adhesive bonding and sticking down loose felt.