Surface Preparation
• All floors on which tiles are to be set must be structurally sound and free of frost.
• The atmosphere temperature must be above freezing during its initial cure.
• All substrates should be mechanically cleaned of dust, grease, oil, dirt, and other bond breakers.
CONCRETE AND OTHER CEMENTITIOUS SUBSTRATES
• Dampen cementitious substrates prior to applying KeedeSet Flex.
WOODEN SUBSTRATES
• Use a minimum 5/8” premium plywood over the subfloor: all wooden flooring underlayment to be placed over 16” on center joists with a total thickness of 1 1/4” of wood.
• The flooring must be secured with screw type nails and glued where possible. Make sure there is absolutely no movement in the floor.
• A gap of 1/8” should be left between sheets of plywood to allow for expansion.
• Dampen or use a very loose mortar mix slurry plywood prior to application.
Mixing and Material Application
Blend with 5-5.5 quarts cool, clean water.
• Mix All Purpose KeedeSet Flex with clean water to obtain a smooth mortar.
• Allow mix to slake for 10-15 minutes, and then rem ix before using.
• Spread mortar with flat side of trowel to wet substrate; then re apply mortar to a depth sufficient to be notched with 1/4” x 3/8” notched trowel.
• With high lug bowed or large tiles, “back buttering” is required to gel a minimum of 1/8” thick after tile has been beat-in.
• Do not adjust after they have been set past 10-15 minutes.
CURING & GROUTING
• A minimum cure is obtained in 12-24 hours depending on ambient temperature.
• Grouting can be done before the mortar takes its final set if caution is used not to break the plastic mortar bond to the tile.
• Normal grouting should be done 24 hours later.
