ARDEX SD-P® RAPID Self-Drying, Trowelable Concrete Underlayment is formulated with a special blend of Portland cement, other hydraulic cements and polymers. It is a self-drying, fast setting, trowelable patch for smoothing and repairing concrete floors, ramps and stairways, as well as non-porous substrates such as terrazzo, ceramic and quarry tile, prior to the installation of floor covering.
A blend of Portland cement and other hydraulic cements
Provides a smooth surface prior to floor covering installation
Ideal for ramping, patching large areas and screeding
Fluid consistency for ease of application
Ready for floor covering in as little as 60 minutes
Install neat up to 1″ (25.4 mm) and up to 3″ (7.6 cm) with aggregate
Mixes with water only – no latex additive necessary
Mixing Ratio: 4 quarts (3.8 L) of water per 40 lb. (18 kg) bag
For smaller batches, use 3.5 parts powder to 1 part water by volume
Coverage: 25 sq. ft. per 40 lb. (18 kg) bag at 1/4’’ (2.3 sq. m at 6 mm)
50 sq. ft. per 40 lb. (18 kg) bag at 1/8’’ (4.6 sq. m at 3 mm)
Coverage will vary depending on the texture of the surface being smoothed.
Initial Set (ASTM C191): Approx. 30 minutes
Final Set (ASTM C191): Approx. 60 minutes
Compressive Strength (ASTM C109/mod – Air cure only): 4,200 psi (294 kg/sq. cm.) at 28 days
Flexural Strength (ASTM C348): 1,000 psi (70 kg/sq. cm.) at 28 days
Install Flooring: Install standard flooring as soon as the ARDEX SD-P RAPID can be worked on without damaging the surface, or approximately 60 minutes at 70˚F (21˚C). Allow ARDEX SD-P RAPID to cure for 16 hours (70˚F / 21˚C) before installing wood flooring or high-performance adhesives, such as epoxies or urethanes.
Packaging: 40 lb. (18 kg) bag
Storage: Store in a cool, dry area. Do not leave bags exposed to sun. Protect unused material by removing air from bag and sealing tightly.
Shelf Life: 9 months, if unopened
Warranty: ARDEX L.P. Standard Limited Warranty applies. Also eligible for the ARDEX/HENRY SystemOne™ Warranty when used in conjunction with select HENRY® Flooring Adhesives.
For complete product technical information, click on the Downloads tab and open the Technical Data download.