Transtar?s Mul-Tie Adhesion Promoter & Tie-Coat greatly enhances the adhesion, appearance and durability of virtually all types of finishes, even when applied over difficult types of plastics such as TPO and polypropylene. Mul-Tie Adhesion Promoter & Tie-Coat can be used under primers on flexible and rigid plastic parts, as a tie-coat between fresh or existing primer and color or base coat, and for edging and blend areas. It is excellent for use on fiberglass, SMC, PUR, PC and over properly prepared primers and coatings.