EcoStar Niagara Slate Roof Tiles Class C 95487 or extra stretch use Chemlink

or extra stretch use Chemlink Durasil

To back up their claim

This is a penetrating sealer and does not produce a coating on the surface like a polyurethane or lacquer finish

alkylphenol ethoxylates (APEs) or ethylene glycol commonly used in paint

EcoStar Niagara Slate Roof Tiles Class C 95487 or extra stretch use ChemlinkAuthentic slate looking recycled rubber tiles NOTE: These are Class C fire rated Niagara Slate tiles. For Class A fire rated Niagara Slate, click here. EcoStar's Niagara Slate (formerly known as Majestic Niagara Slate or Empire Niagara Slate) emulates the look, feel and longevity of natural slate. It is substantially lighter in weight than slate, concrete and metal roofing, and is produced using some of todays strongest, most flexible materials,