Organic sealant is a type of sealant that is made from natural materials such as plant-based oils, waxes, and resins. It is often used in construction and home improvement projects to provide a waterproof barrier between two surfaces. TAR, which is a three-letter word, is one of the most common organic sealants used today. It is a black, viscous liquid that is derived from the distillation of coal, wood, or petroleum. TAR is known for its strong adhesive properties and is often used to seal roofs, walls, and other surfaces.