Flood Testing - Allow membrane to cure fully before flood testing, typically a minimum 2 hours at 70°F (21°C) and 50% RH. Cold conditions will require a longer curing time. For temperatures between 50°F and 69°F (10°C to 21°C) allow a minimum 24 hour cure period prior to flood testing. MIXING Mix according to printed product instructions included with each LATICRETE ® product package. FLOOR TILE INSTALLATION Bonded Thick Bed Method: Apply LATICRETE ® 254 Platinum with flat trowel as a slurry bond coat approximately 1/16” (1. 5mm) thick in compliance with current revision of ANSI A108. Place LATICRETE ® 3701 Fortified Mortar Bed, over slurry bond coat while still wet and tacky. Fully compact the bed by tamping and finish mortar bed to desired elevation(s). Allow mortar bed to cure for minimum 7 days @ 70° F (21°C), prior to installation of membranes and moisture sensitive concrete tiles. Clean excess mortar/adhesive from finished surfaces. For tile installation, over cured (pre-floated) latex-portland cement thick bed mortar, follow Thin Bed Method . Thin Bed Method: Install LATICRETE ® 254R Platinum Rapid, in compliance with current revisions of ANSI A108.02, A108.1B and ANSI A108.5. Use the appropriate trowel notch size to ensure proper bedding of the tiles. Work the thinset into good contact with the substrate and comb with notched side of trowel. Spread only as much thinset as can be covered while the mortar surface is still wet and tacky. Back-butter tiles to ensure 100% coverage. Firmly embed each tile into the thinset to ensure full bedding and flatness. For installations onto metal stairs, use only LATAPOXY ® 300 Adhesive. Allow installation to set until firm; typically 24 hours @ 70° F (21°C). Clean excess mortar from tile surfaces and open grout joints immediately, while it is still wet and tacky. Medium Bed Method: Install LATICRETE ® 4-XLT Rapid, in compliance with current revisions of ANSI A108.02 (3.11), A108.1B and ANSI A108.5. Use appropriately-sized notch trowel to ensure proper bedding of the tiles. Firmly apply LATICRETE ® 4-XLT Rapid into good contact with the substrate using the flat side of the trowel. Next, immediately apply 4-XLT Rapid to the substrate with notched side of trowel. Spread only as much 4-XLT Rapid, as can be covered, while it remains wet and tacky. Back-butter tiles to ensure 100% coverage. Allow installation to set until firm; typically 24 hours @ 70° F (21°C). Clean excess mortar from tile surfaces and open grout joints immediately, while it is still wet and tacky. GROUT INSTALLATION Polymer Fortified Cement Grout (ANSI A118.7): Allow tile installation to cure a minimum of 24 hours @ 70° F (21°C). Verify grout joints are free of dirt, debris or tile spacers. Sponge or wipe dust/dirt off veneer face and remove any water standing in joints. Apply grout release as recommended. Surface temperature must be between 40-90° F (4-32°C). Pour approximately 64 oz. (1.9 L) of clean, potable water into a clean mixing container. Add a 25 lb. (11.3 kg) bag of LATICRETE ® PERMACOLOR™ Grout to the container while mixing. Mix with a slow speed mixer to a smooth, stiff consistency. Install latex fortified cement grout in compliance with current revisions of ANSI A108.1A, ANSI A108.02 and ANSI A108.10. Dampen dry surfaces with clean water. Spread using a sharp edged, hard rubber float and work grout into joints, packing joints full and free of voids/pits. Hold float face at a 90° angle to grouted surface and use float edge to "squeegee" off excess grout, stroking diagonally to reduce pulling grout out of filled joints. Initial cleaning can begin as soon as grout has become firm, typically 15-20 minutes after grouting @ 70° F (21°C). Begin initial cleaning by lightly dampening the entire grouted area with a damp sponge. Then wash clean the entire area with a damp (not wet) sponge. Drag a clean towel, dampened with water, or wipe a clean, dampened sponge, diagonally over the veneer face to remove any grout haze left after “squeegeeing.” Rinse towel/sponge frequently and change rinse water at least every 200 ft 2 (19m 2 ). Repeat this cleaning sequence again if grout haze is still present. Allow grout joints to become firm. Buff surface of grout with clean coarse cloth. Inspect joint for pinholes/voids and repair them with freshly mixed grout. Within 24 hours, check for remaining haze and remove it with warm soapy water and a nylon scrubbing pad. Do not use acid cleaners on latex Portland cement grout less than 10 days old.
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