a solvent - based , clear caulking composition having as a primary polymer an ethylene vinyl acetate copolymer having a 45 - 55 % vinyl acetate content and having as a secondary polymer and a small amount of an ethylene vinyl acetate copolymer having a lower vinyl acetate content . other ingredients in the improved caulking composition include a water white styrenic hydrocarbon resin , thickening agents , and an organic solvent . optional components include plasticizers , bactericides , antioxidants , u . v . light stabilizers , pigments and dyes , etc . the resulting caulk has excellent pumpability , slump control , and weatherability .