PrepPro Everyday Light Weight (ELW) self-leveling underlayment (SLU) is a premium fast
drying, calcium aluminate cementitious underlayment that reduces the dead weight load of
traditional SLU’s by about 35% all while delivering compressive strengths > 3500 psi! PrepPro ELW is suitable for use in most flooring applications without the costly and time consuming need to cap with a stronger product prior to installing finished flooring.

PrepPro ELW is used for leveling and smoothing of floors for tile, stone, resilient, wood, carpet and other floor coverings. PrepPro ELW seeks its own level providing excellent working time and is able to receive breathable flooring finishes as early as 4 hours after application, non-breathable at 16 hours. PrepPro ELW is suitable for foot traffic after 3 hours, and light trade traffic next day.

PrepPro ELW sets the standard for sustainability in this segment:
- ELW utilizes a high percentage of post-consumer recycled content
- ELW contains a much lower percentage of crystalline silica than typical SLU’s
- ELW provides reduced structural dead loads.
- PrepPro ELW makes flooring work lighter every day with a 33 pound bag providing the same yield as a traditional 50 pound bag!

SUITABLE Substrates 

 (well bonded, clean, dry, sound and stable)

• Absorbent and non-absorbent interior concrete
• Properly prepared Gypsum-based underlayment (> 3000 psi)
• Exterior grade plywood
• Well Scraped adhesive residue(Excludes PSA and re-emulsifiable adhesive)
• ASTM F3010 Epoxy Moisture Membranes

Application Procedures

FOR PROFESSIONAL USE ONLY

PrepPro ELW offers a variable water ratio to aid in material placement and design flexibility.

• Start with clean, sized mixing container and potable water.
• Place designated mixing water (5.5 – 5.75 US quarts per 33 lb bag) in mixing container.
• DO NOT OVERWATER. Overwatering will reduce compressive strength.
• Add PrepPro ELW to the designated water and mix for 2.5 - 3 minutes with a power
drill/mechanical mixer >650 RPM. Material must be homogenous and lump-free prior to
placement.
• Pumpability: Once mixed, the the material may be immediately pumped via transfer pump with
up to 150 ft of hose. Avoid placing hoses in such a fashion to increase back pressure. Prep
Pro ELW is not suitable for a continuous mixing pump.

Once material is mixed, pour onto floor and spread to depth with a gauge rake or other. Once at desired depth, use a smoother or magic trowel to lightly break surface tension to apply finishing touches to the placement.

Always pour additional materials into existing materials on the substrate along the wet edge of the placement – “keep a wet edge.” Where depths greater than 2” are desired, utilize a two lift system. Contact Technical services for details. PrepPro ELW performs best when final smoothing is achieved within 12-15 minutes of placement.

Dry Time Prior to Flooring Installation

PrepPro ELW is self-drying. Avoid direct sunlight and direct air movement across the surface of the PrepPro ELW during the curing process. PrepPro ELW is self-drying. Applications of breathable floor finishes (Ceramic Tile) may take place 12-16 hours after placement, Moisture sensitive floor coverings after 48 hours.

DATA SHEET

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