

DESCRIPTION
DYNA® SL-E is a performance enhanced quick-setting self-leveling underlayment. It is used to level floors prior to the installation of ceramic tile, natural stone, resilient flooring, carpet, wood and other floor coverings. It is a high compressive strength underlayment and it can be applied from feather-edge to 38 mm (1 1/2") thick in a single pour. It is a self-leveling and rapid-hardening underlayment and repair mix for interior concrete and engineer-approved floors. It offers high compressive strength, and has a long heal time. Light foot traffic can begin after 3 to 4 hours and vehicular rubber-wheel traffic after 3 days.
FEATURES & ADVANTAGES

The benefits associated with the use of this product are:
- High Compressive Strength, rapid-setting and rapid-hardening
Can be applied from featheredge to 38 mm (1 1/2") thick in a single pour
- Cures fast and develops high early strength for quick installation of final floor coveringsttt
- Rated for extra heavy use on wood subfloors with joists to 61 cm (24") per ASTM C627
- Long heal times for extended workability
- Water resistant, non-shrinking
- Pumpable, free-flowing, eliminates sanding and troweling
- Compatible with most adhesives
- Provides a smooth, level and uniform surface
- Suitable on floors with radiant heating
- Zero VOC content and low odor
USES, SUITABLE SURFACES AND SUBSTRATES
DYNA® SL-E is suited for quick-turnaround leveling, smoothing and repairing of interior floors before the installation of floor coverings. Ceramic tile and natural stone can be installed as soon as 3 to 4 hours after application. Other floor coverings, such as carpet, vinyl sheet goods, vinyl tile, vinyl composition tile (VCT), homogenous PVC, rubber and engineered wood plank, can typically be installed 24 to 72 hours after application.
It can be applied on the following surfaces:
- Concrete and existing mortar beds that are, sound, dry, dimensionally stable, and fully cured for at least 28 days old.
- Cement backer boards
- Exterior grade plywood (interior) with floor joists up to 61 cm (24") o.c. Subfloors must be properly prepared, bonded, and free from dirt and dust.
- Existing ceramic tile, pavers, brick
- Natural stone
- Concrete terrazzo
- Well bonded vinyl and resilient flooring
- Epoxy-based moisture barriers and epoxy terrazzo
- Cutback adhesive (non-water soluble)
- Properly prepared OSB
- Radiant heating systems
WHERE TO USE
- Interior residential ( apartments, condominiums and homes)
- Interior commercial ( office buildings, hotels, restaurants, and cafeterias )
- Interior institutional ( schools, universities, libraries, penal institutes, and hospitals)
- Interior heavy commercial ( hotels, convention centers, theme parks and attraction centers, sporting complexes, shopping malls, grocery stores, department stores, airports )
SUITABLE FLOOR COVERINGS
- Ceramic tile, pavers, brick, thin brick
- Impervious porcelain and glass tile
- Natural and dimensional stone, terrazzo
- Carpet
- Wood, parquet
- Vinyl composition tile (VCT)
- Sheet vinyl flooring
- Laminated flooring
COLORS

STANDARDS, APPROVALS AND TEST METHODS
- ASTM C109 for Compressive Strength
- ASTM C348 Flexural Strength
- Meets compression and flatness requirements of ASTM F710-17, Standard Practice for Preparing Concrete Floors to Receive Resilient Flooring
- Meets compression and flatness requirements of ASTM F2873, Standard Practice for the Installation of Self-Leveling Underlayments and the Preparation of Surface to Receive Resilient Flooring
- ASTM C627 Standard Test Method for Evaluating Ceramic Floor Tile Installation Systems Using the Robinson-Type Floor Tester
- ASTM F1869 Standard Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Anhydrous Calcium Chloride
- ANSI A108.01 & A108.02 of the American National Standards for the Installation of Ceramic Tile Resilient Floor Covering Institute (RFCI) - Recommended Work Practices for Removal of Resilient Floor Coverings
- Tile Council of North America (TCNA) - TCNA Handbook for Ceramic Tile Installation, TCNA Method EJ171
- LEED Points Contribution ……… LEED Points Available
MR Credit 5 …………………………… 2 Points
LIMITATIONS
- Do not use over gypsum underlayment.
- Do not use when the temperature is below 10°C (50°F). In cooler conditions, use indirect auxiliary heaters to maintain an ambient substrate temperature. Maintain this minimum temperature for at least 72 hours after applying.
- Do not use on sloped surfaces that require drainage.
- SL-E is for use in dry, interior area use only. For exterior use or for areas subject to prolonged exposure to moisture or water, use an exterior rated DYNA brand of underlayment, topping or screed.
- Not for use in submerged applications.
- Do not install SL-E over particleboard, chipboard, Masonite®, luan panels, metal, asbestos, gypsum-based patching materials or any other unstable materials.
- Do not exceed recommended mixing ratio as indicated in mixing instructions. Over watering will weaken product properties.
- Never mix with cement or other admixtures.
- Do not install over moving control joints (with active cracks) or over expansion joints.
- Do not use as a final wear surface. SL-E must be covered with a finished flooring system.
- Do not install if the maximum allowable deflection of the supporting surface exceeds L/360 (or L/720 for installations involving natural stone or their agglomerates) when exposed to live or dead loads.
SECTIONS - 03 54 00 |
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. 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 lb.) 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 DYNA brand of primer before applying SL-E. 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 it 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-E 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-E powder while slowly mixing. Mix water and SL-E powder to a mixing ratio of 4,5 to 5 L (4,23 to 4,7 U.S. qts.) of water per 22,7 kg (50 lb.) bag of SL-E. Upon combining all of the water and the entire contents of SL-E, 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 1,200 rpm) with a mixing paddle. Typically, this mixing procedure involves two bags of SL-E 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-E 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
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-E powder while slowly mixing. Mix water and SL-E powder to a mixing ratio of 4,5 to 5 L (4,23 to 4,7 U.S. qts.) of water per 22,7 kg (50 lb.) bag of SL-E. Upon combining all of the water and the entire contents of SL-E, 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.
Use the same mixing ratio as described above and use a high-speed mixer (at about 1,200 rpm) with a mixing paddle. Typically, this mixing procedure involves two bags of SL-E 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.
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. Quickly pour or pump SL-E onto the properly prepared and primed surface in a ribbon pattern. If a wet edge cannot be maintained, reduce the width of the pour.
SL-E 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.
After placing SL-E, spread the material with a gauge spreader to assist in gauging out the SL-E to the desired depth. SL-E will seek its own level during the first 10 to 15 minutes. For featheredging and touch up, use a smoothing tool. SL-E can be applied to 38 mm (1 1/2") 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 DYNAFLEX RS (min. 3 mm [1/8"] thick and allow to dry or prime the surface according to the priming instructions and install SL-E.
D. CURING
- DYNA® SL-E cures to a walkable hardness in about 3 to 4 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 3 to 6 hours; for impervious floor coverings, allow 24 to 72 hours. Test for moisture content before applying vinyl or wood flooring.
- Protect installation from traffic, dirt and dust from other trades until SL-E has completely cured and before the final floor surface has been installed.
- Do not subject SL-E to dynamic loads for at least 72 hours after installation.
COVERAGE
Approximate Product Coverage* per thickness for a 22.7 kg (50 lb.) bag is as follows:
Thickness | Yield |
---|---|
3 mm (1/8") | 4,46 m² (48 sq. ft.) |
6 mm (1/4") | 2,23 m² (24 sq. ft.) |
13 mm (1/2") | 1,11 m² (12 sq. ft.) |
18 mm (3/4") | 0,8 m² (8.6 sq. ft.) |
25 mm (1") | 0,6 m² (6.4 sq. ft.) |
38 mm (1 1/2") | 0,4 m² (4.27 sq. ft.) |
CLEAN-UP
Wash hands and tools with water promptly before material hardens.
PACKAGING
DYNA® SL-E Performance Enhanced Quick-Setting Self-Levelling Underlayment is available in 22.7 kg (50 lb.) Bag.
STORAGE
Do not double stack pallets of DYNA® SL-E, use industrial shelving.
The shelf-life is 1 year if stored off the ground in dry areas at 18-27°C (65-80°F) with 50% relative humidity.
SAFETY WARNINGSCAUTION. Consult and read the SDS thoroughly for this product for more safety information.
This product is corrosive as it contains Portland cement. Portland cement when mixed with
water results in a solution of calcium hydroxide and is therefore injurious to the eyes and can
cause skin irritation. Therefore, avoid eye contact and prolonged contact with the skin. Protect
eyes with goggles and skin with waterproof gloves. If splashed in eyes, flush thoroughly for at
least 15 minutes and consult a physician immediately. In case of ingestion consult a physician
immediately. |
NOTICEDYNA shall not be liable for incidental and consequential damages, indirectly or directly sustained, nor for any loss by application of these goods not in accordance with the printed instructions or for other than the intended use. Before using the user shall determine the suitability of the product for its intended use and the user will assume all risks and liabilities that may arise in connection therewith. DYNA’s liability is expressly limited to the replacement of defective goods. Any claim shall be deemed waived unless the claim is made in writing to DYNA within 30 days |
LIMITED WARRANTY
This premium quality product was designed to satisfy the user. If you are not satisfied after Surface Testing on a small area, please contact our technical service department immediately.
NO WARRANTIES expressed or implied are offered by DYNA. The Manufacturer’s liability is limited to the replacement of products proven defective.
The user assumes all risks and liabilities associated with the use of this product.

Technical Data |
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Test Procedures / Characteristics | Typical Values Obtained |
---|---|
Physical state | Powder |
Color | Light gray |
Flammability | Flame spread: 0 Fuel contribution: 0 Smoke development: 0 |
VOCs (Rule #1168 of California's SCAQMD) | 0 g/L |
Mixing ratio Water to SL-1 (powder) per 22,7 k (50 lbs) |
4,23 to 4,70 L per 22,7 kg (4,5 to 5 U.S. qts.)) |
Density | 2,0 kg per L (124 lbs. per cu. ft.) |
pH | 11 when wet |
Application temperature range | 10°C to 35°C (50°F to 95°F) |
Working time | Approx. 15-20 minutes |
Heal time | Approx. 10-15 minutes |
Final set | Typically 3 to 4 hours |
Time required before installation of tile and stone | 3 to 6 hours, depending on temperature and humidity |
Time required before installation of floor covering or coating | 24 to 72 hours, depending on temperature and humidity |
Compressive strength ASTM C109 | |
1 day | > 15,51 MPa (2,250 psi) |
7 days | > 25,85 MPa (3,750 psi) |
28 days | > 31,72 MPa (4,600 psi) |
Flexural strength ASTM C348 | |
1 day | > 3,79 MPa (550 psi) |
7 days | > 5,52 MPa (800 psi) |
28 days | > 7,24 MPa (1,050 psi) |
Pullout stregth (rupture of concrete) ASTM C1583 | |
28 days | > 2,41 MPa (350 psi) |
Shelf Life and Storage | |
Shelf life | 1 year if stored off the ground in dry areas at 18-27°C (65-80°F) with 50% relative humidity. |
Storage | Do not double stack pallets of product, use industrial shelving. |
CSI Division Classifications | |
Cast Underlayment | 03 54 00 |

TECHNICAL SUPPORT
If you have any questions or if you need any additional information on DYNA’s products, please call our company or reach us by e-mail at This email address is being protected from spambots. You need JavaScript enabled to view it.
Team Dyna