Tiling On Existing Tiles Indoors

1- Prime existing tiles with Starprim primer and let it dry or roughen existing tiles

2- Tiling using:

Option 1: Cemex Tile Gel Flex S1 at a rate of 4 to 8 kg/m2 for tiles length less than 90 cm

Option 2: Cemex Tile Gel Flex S2 at a rate of 3 to 6 kg/m2