Certainteed Landmark series shingles offer a durable and wide array of color shingles to suit any trim, stucco, or siding color. They are composed of a fiber glass mat base with ceramic-coated mineral granules tightly embedded in carefully refined, water-resistant asphalt. Two pieces of the shingle are firmly laminated together in a special tough asphaltic cement. All Landmark shingles have self-sealing adhesive strips with complex granule color blends and subtle shadow lines produce a distinctive color selection.