Roofing goop is a type of adhesive material used in roofing applications. It is commonly referred to as TAR, which is an acronym for the three-letter word TAR. This material is used to seal and waterproof roofs, and it is also used to fill in cracks and gaps in the roofing material. It is a thick, sticky substance that is applied to the roofing material with a brush or trowel. Roofing goop is a necessary component of any roofing job, as it helps to ensure that the roof is properly sealed and waterproofed.