DIRECTIONS

A. SURFACE PREPARATION

1. All substrates must be to the recommended tolerances of ANSI A108.5 for dry-set mortar installations. 2. The substrates must be structurally sound, solid, 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.
3. Painted surfaces must be completely sanded, scrapped, or chipped to promote adhesion. Surfaces may be cleaned with DYNA brand of cleaners if thoroughly flushed and neutralized.
4. For Exterior grade plywood substrates the wood sub-flooring must be structurally sound and securely fastened with screw type or ring shank nails and adhesive.
5. Plywood flooring should be free from dust, dirt, oil, grease, etc. There must be 2 layers of 16 mm (5/8“) exterior grade plywood on bridged floor joists 400 mm (16”) on center with a maximum deflection of 1/360 of the span for ceramic tile and 1/720 for natural stone tile. Joints on the top layer should be offset from the joints on the bottom layer of plywood. A gap of 6 mm (1/4“) is required between overlay sheets and all materials they abut such walls, adjacent sheets, posts, etc. The adjacent edges of plywood sheets shall not be more than 0.8 mm (1/32“) above or below each other.

B. MIXING

1. Use a clean mixing vessel and pour approximately 5.0 to 6.0 liters (1.3 to 1.6 U.S. gal.) of cold clean water and then add 11.3 kg (2.20 lbs) of DYNA® AEROFLEX 670 gradually while mixing.
2. Use a slow speed mixer (approximately 150 R.P.M). Mix thoroughly to a homogeneous and smooth consistency.
3. Avoid air entrapment by prolonged mixing which can result in a shorten pot life and reduce the compression strength of the mortar.
4. Let the mix slake for 10 to 15 minutes.
5. Re-stir the entire contents of the vessel without adding anymore water to the dry mix.
6. Wash your tools immediately after mixing.
7. The pot life of the mix is between 4 and 6 hours.

NOTE: Some stiffening may occur before all material is used (approximately 4 hours). When this occurs, simply re-stir by hand or machine, but DO NOT add any more liquid.

C. APPLICATION

1. Use of a recommended notched trowel with adequate depth (refer to coverage section listed below) to achieve a 100% mortar contact. 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 in the tiles with a beating block in order that at least 1/4 of the thickness of the tile is set into the mortar bed. Finished mortar bed thickness should be between 1/8 to 3/4 inch (3-19 mm) thick after tiles are beat in without any voids or air pockets.
4. Ensure that all your alignments and adjustments are performed immediately (do not exceed 30-40 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 sponge. 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 applications or when installing marble, granite, or porcelain floor tiles, back butter each tile immediately prior to laying it into position using the flat edge of the trowel to ensure and achieve 100% mortar contact.