DIRECTIONS

A. SURFACE PREPARATION

Surfaces must be structurally sound, clean, dry and free from grease, oil, paint, tar, asphalt, wax, sealers, curing compounds, release agents, laitance, dirt and other contaminants that would prevent good adhesion. Maintain ambient room temperature. Surfaces and materials should be maintained at higher than 10°C (50°F). Moisture vapor transmission should be less than 2,23 kg (5 lbs.) per 92,9 m² (1000 ft²) per day in accordance with ASTM F1869 or equivalent. If vapor transmission exceeds the recommended maximum, contact DYNA Technical Services for further assistance.

Always prime the prepared surface with a DYNA brand of primer before applying SL-1. Do not apply primer over wet surfaces. Apply the primer with a paint brush, short nap roller or soft push broom. Apply a thin even coat and allow to dry approximately 2 hours to a clear film.

Concrete surfaces must be fully cured and must accept water penetration. New concrete surfaces must be at least 28 days old. Contaminants should be mechanically removed before installation. Concrete must be free of efflorescence and not subject to hydrostatic pressure. It is recommended to mechanically roughen concrete to ensure a good bond. Concrete surfaces can be mechanically profiled and prepared by shot-blasting, sandblasting, water-jetting, scarifying, or diamond-grinding.

Plywood floors, including those under resilient flooring, must be structurally sound and must meet all the ANSI standards. The maximum allowable deflection of the supporting surface must not exceed L/360 (or L/720 for installations involving natural stone or their agglomerates) when exposed to live or dead loads. SL-1 can be used over subfloors of engineer-approved plywood or OSB subfloors. When applying DYNA underlayments to plywood flooring, installation requirements (finished flooring, load, use, and/or deflection) may require the utilization of a metal lath or diamond mesh on top of the primed surface prior to the application of the underlayment. In all cases one can anticipate better performance when utilizing a lath, particularly over OSB. Differential or excessive movement within plywood substrate may lead to hairline cracks at plywood joints. For a metal lath, fasten every 15–20 cm (6"–8") with fasteners that have a galvanized or corrosion resistant coating. For a 18,2 mm (23/32") plywood subfloor with 61 cm (24") o.c. joists, the metal lath must be a minimum of 1,13 kg/m² (2,5 lb/yd²).
All plywood seams should be gapped 3 mm (1/8") and protected by placing a minimum 38 mm (1,5") bond breaker tape over the gaps.
Provide for expansion and control joints where specified, including the perimeter of the room, columns, supports and equipment pedestals. Where control or expansion joints do not exist in the substrate, provide for them in the system.

B. MIXING

SMALL CONTENT MIXES
Use a clean mixing vessel 18,9 L (5 U.S. gals.) and pour the required amount of cool, clean, potable water. Use a heavy duty 13 mm (1/2") electric drill and mixing paddle at 500 R.P.M. Add SL-1 powder while slowly mixing. Mix water and SL-1 powder to a mixing ratio of 4,55 to 5.0 L (4,81 to 5,28 U.S. qts.) of water per 22,7 kg. (50 lb.) bag of SL-1. Upon combining all of the water and the entire contents of SL-1, begin mixing material together to a homogenous and lump-free consistency. This takes from 90 to 120 seconds. This mixing ratio must remain consistent. Do not overwater material.

DRUM MIXING
Use the same mixing ratio as described above and use a high-speed mixer (at about 1200 rpm) with a mixing paddle. Typically, this mixing procedure involves two bags of SL-1 with the correct water ratio as described above. Mix to a homogenous, lump-free consistency for about 90 to 120 seconds. Do not overmix. Overmixing can cause air entrapment, which will shorten the pot life or cause pinholing during application and curing.

PUMP MIXING
SL-1 can be mechanically mixed, using the appropriate mixing ratio above, with a continuous mixer, pump and hose or a batch mixer, pump and hose.

C. APPLICATION

Ensure that doors and windows are closed, and turn off HVAC systems to prevent drafts during application and until floor is cured. Turn off all radiant heating systems. Protect areas from direct sunlight.
When working in large areas it can be made easier and more efficient by using conventional piston, rotor-stator or underlayment-type pumps. For best results a team may be required. Work as a team to provide a continuous flow of wet material, to avoid trapping air or creating a cold joint.
Set the width of the pour at a distance that is ideal for maintaining a wet edge throughout placement.

1. Quickly pour or pump SL-1 onto the properly prepared and primed surface in a ribbon pattern. If a wet edge cannot be maintained, reduce the width of the pour.
2. SL-1 has an approximate working time of 15 minutes at 23°C (73°F). It should be noted that temperature and humidity will affect working time, flowability and setting time.
3. After placing the SL-1, spread the material with a gauge spreader to assist in gauging out the SL-1 to the desired depth. SL-1 will seek its own level during the first 10 to 15 minutes.
4. For featheredging and touch up, use a smoothing tool. SL-1 can be applied to 50 mm (2") thick in one application; if a second layer is required, install immediately after the first layer has set to a walkable hardness. If the first layer has dried over 12 hours, re-prime before the second application. All of the above statements are subject to real-time jobsite temperatures and humidity conditions.

INSTALLATION OVER EXISTING CERAMIC TILE, STONE OR CEMENT TERRAZZO
1. Skim coat existing ceramic tile, cement terrazzo or natural stone with DYNA® DYNAFLEX RS (min. 3 mm [1/8"] ) thick and allow to dry.
2. Prime surface according to the priming instructions and install DYNA® SL-1.

D. CURING

- DYNA® SL-1 cures to a walkable hardness in about 3 hours. Do not use a damp-curing method or curing and sealing compounds as this product is self-curing.
- For ceramic tile and stone, allow 4 hours; for impervious floor coverings, allow 16 to 24 hours. Test for moisture content before applying vinyl or wood flooring.
- Protect installation from traffic, dirt and dust from other trades until DYNA® SL-1 has completely cured and before the final floor surface has been installed.
- Do not subject DYNA® SL-1 to dynamic loads for at least 72 hours after installation.