Log Jam chinking is the gold standard in log home chinking. In addition to excellent performance characteristics, including elasticity and durability, it is the only synthetic chinking on the market to hold a UL fire rating. Log Jam is available is eight colors, and it will stretch and compress right along with the logs of your home to maintain its seal and protect your home. Sashco Log Jam chinking is a high-performing chinking material that keeps out the wind, weather, and anything else trying to squeeze through the cracks. It is known for its durability and elasticity, characteristics which allow Log Jam to shrink and compress and logs swell and shrink—up to twice the original joint size—for years and years. While it has the appearance of traditional log cabin mortar, Log Jam is a high-performance synthetic, the only one on the market, in fact, with a UL fire rating. Log Jam is available in a variety of colors including Grey, Light Grey, Mortar White, White White, Buff, Tan, Dark Brown, and Woodtone Cedar.