Enhance the durability of your sealants with FirstKem’s 3M™ Adhesion Promoter AC-137. Designed to improve the adhesion of polysulfide sealants to windshields, canopies, and windows, this product ensures strong, long-lasting bonds without damaging delicate surfaces. Available in clear or red for easy application, it prevents crazing on transparent materials and simplifies the sealing process with a one-component formula.