DIRECTIONS

A. SURFACE PREPARATION

1. All substrates must be to the recommended tolerances of ANSI A108.5 for dry-set mortar installations. The substrates must be structurally sound, stable, dry, clean, and free of grease, oil, paint, dust, tar, wax, curing agent, primer, sealer, or, any other substances, which may prevent or reduce the adhesion of this product. Painted surfaces must be completely sanded, scraped, or chipped to promote adhesion. Surfaces may be cleaned with a DYNA brand of cleaner if thoroughly flushed, rinsed and neutralized.
2. For exterior grade plywood substrates the wood sub flooring must be structurally sound and securely fastened with a screw type or ring shank nails and adhesive. Plywood flooring should be free from dust, dirt, oil, or grease. There must be 2 layers of 16mm (5/8”) exterior grade plywood on bridged floor joists exceeding 400mm (16”) maximum spacing on center with a maximum deflection of 1/360 of the span. Joints on the top layer should be offset from the joints on the bottom layer of the plywood. A gap of 3mm (1/8”) is required between overlay sheets and all materials they abut such as walls adjacent sheets, posts, etc. shall have a gap of a 6 mm (1/4”). The adjacent edges of plywood sheets shall not be more than 0.8 mm (1/32”) above or below each other
3. Detailed installation procedures may be found in the TCA handbook and hall conform to ANSI 108.5.

B. MIXING

1. Use a clean mixing vessel and pour approximately 5.0 to 5.5 litres of cold clean water then add 22.7 kgs (50 lbs) of MULTIFLEX 620 gradually while mixing.
2. Use a slow speed mixer (approximately 150 R.P.M.) Mix thoroughly to a homogeneous and smooth consistency. Avoid air entrapment by prolonged mixing, which if occurs will lower compressive strength of the mortar.
3. Permit the mix to slake for 10 to 15 minutes.
4. Re-stir the entire contents of the vessel without adding anymore water to the mix.
5. Wash you mixing tools immediately with water after use.
6. Some stiffening of the mix may occur before all the material is consumed.
When this occurs, simply restir by hand or machine, but DO NOT add any more water.

C. APPLICATION

1. Use of a recommended notched trowel with adequate depth to achieve a 100% mortar contact, after beat-in, to the back of the tiles is recommended. Using the flat edge of the trowel, spread a thin coat over the substrate.
2. Then apply additional material and comb the mortar with the notched side of the trowel. Do not spread more mix than can be covered with the tiles within 10 to 15 minutes, otherwise a skin may form on top of the mortar and proper adhesion will not be achieved.
3. Place the tiles firmly into position with a slight twisting motion. Then once the tile has been set, properly beat the tile with a beating block in order that at least 6.4mm (1/4”) of the thickness of the tile is set into the mortar bed. Finished mortar bed thickness should be between 2.5 to 3mm (3/32” to 1/8”) thick after the tiles are beat in without any voids or air pockets.
4. Insure that your alignments and adjustments are performed immediately (do not exceed 30 to 40 minutes).
5. Should skinning occur, remove the dry or skinned mortar and replace it with fresh mortar. Clean out the joints and smudges from the face of the tile immediately with a damp towel. Leave at least 2/3 of the joint depth open for grouting. Do not soak the tiles before application.
6. For commercial floors, shower applications and exterior application or when installing marble, granite, or porcelain tiles, back butter each tile immediately prior to laying it into position using the flat edge of the trowel to ensure and achieve a 100% mortar contact.

NOTE: Follow T.C.A. handbook method EJ 171 for detailed specifications. Detailed instructions on the use of this product can be obtained in the Product Data Sheet to this product.