don't know if you have chilltek but for regular vinyl we have always used malco. it's kinda tough to find and can be spensive depending on how big a jug you buy but I have had a gallon for 12 years now and still not empty. used it on 1 supra and 3 tiges with no ill effects BUT you MUST go back over the seats with a uv like babes/303 as it does pull off the protectant or so I was told.