Base Grain Leather Compound LRC45Base Grain Leather Compound LRC45 Used to repair holes in leather, vinyl and hard plastics, replaces the grain where its been removed The most effective heat cure base filler. Our Base Grain Compound is used with a heat iron to create the base for holes in leather. This product is used where holes are very big in leather to act a base grain prior to using the grain copier compound (LRC46), this is applied so its left below the surface so the grain