Shelf-stable one-part room temperature vulcanizable silicone rubber compositions

A process for forming a shelf-stable catalyst composition for a one-part room temperature vulcanizable silicone rubber composition comprising reacting an adhesion promoter selected from the class consisting of silyl maleates, silyl fumarates, silyl succinates, silyl isocyanurates and silyl cyanurates with an acyloxy functional silane cross-linking agent before incorporating the catalyst composition with the rest of the ingredients wherein there is present from 40 to 80 parts by weight of the acyloxy functional silane and from 5 to 15 parts by weight of the adhesion promoter wherein the adhesion promoter is reacted with the acyloxy functional silane at a temperature in the range of 50.degree. to 150.degree. C. for a period of time varying from 1 hour to 7 days.