Product Description: Caulking wood for tombstone and caulk for tombstones. Moisture-curing single-component caulk material does not contain the elusive silicone ingredients found in granite. Caulking gun is required for use. It has rubber elasticity even when cured. Color: Gray (Price for 1 unit. Ingredients: Metamorphic silicone; Compatible Color: Gray: White granite/gray granite; Please do not use ordinary silicone caulking for tombstone repairs. Please use caulk for tombstone repair because the silicone ingredients will penetrate and stain the stone will not fall off.