Exterior Products Review: Synthetic Roofing Architect 10 Sep 2009. 866 423 3302. enviroshake. Tamko Roofing Products. Lamarite Slate shingles are made from a mineral filled polymer and are molded to exhibit the textures and contours of natural slate, according to the manufacturer. The Class A fire rated, Class 4 impact resistant shingles come in four colors.