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. 4. Surfaces may be cleaned with DYNA brand of cleaners if thoroughly flushed and neutralized.

B. MIXING

1. Use a clean mixing vessel and pour approximately 5.5 L (1.45 Gal) to 6.0 L (1.59 Gal) of cold clean water and then add 22.7 kg (50 lbs) of DYNABOND 400 gradually while mixing.
2. Use a slow speed mixer (approximately 150 R.P.M).
3. Mix thoroughly to a homogeneous and smooth consistency. Avoid air entrapment by prolonged mixing which will shorten the 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. When mixing with DYNALASTIC 5000 in place of water pour approximately 7.0 L (1.85 Gal) of DYNALASTIC 5000 and then add the dry mix.
8. 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 anymore liquid.

C. APPLICATION

Read the Safety Data Sheet (SDS) before use.
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.
2. Using the flat edge of the trowel, spread a thin coat over the substrate.
3. Then apply additional material and comb the mortar with the notched side of the trowel.
4. 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.
5. 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.
6. Finished mortar bed thickness should be between 2.5 - 3.0 mm (3/32 to 1/8 inch) thick after tiles are beat in without any voids or air pockets.
7. Insure that all your alignments and adjustments are performed immediately (do not exceed 30-40 minutes).
8. 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.
10. Leave at least 2/3 of the joint depth open for grouting. Do not soak the tiles before application.
11. For commercial floors, shower applications and exterior applications back butter each tile immediately prior to laying it into position using the flat edge of the trowel to insure and achieve 100% mortar contact.