1.1 This standard prescribes the requirements for silicone-based water repellents.
1.1.1 These water repellents can be applied to masonry generally free from cracks exceeding 0.10mm in width, to confer water repellency without appreciable change of colour or appearance other than that imparted by fugitive dye.
IS 12027-1987 history
1987IS 12027-1987 Specifications for silicone waterproofing agents