Hello ... we have a client that has a specified exterior stone and precast cleaner which they use approximately every ten years. We are trying to figure out what the requirements are for cleaners of similar applications because it appears that Green Seal and Eco Logo do not address cleaning of stone or precast concrete and the California Code of Regulations, which defines VOC limits for products that do not fit under GS or CCD, does not have requirements for stone or concrete either.
Thanks!