SUBFLOOR PREPARATION
Concrete subfloors: Must be solid, thoroughly cleaned, free of oil, wax, grease, asphalt, latex patches, curing compounds and any contaminant which might act as a bondbreaker. We recommend that the substrate be mechanically cleaned down to sound, solid concrete by shotblasting, scarifying or similar . Do not use sweeping compounds or solvents. Acid etching is not an acceptable means of cleaning the subfloor.

Non-porous floors, such as terrazzo, ceramic and quarry tile, certain power-troweled (burnished) concrete, and epoxy coatings: Must be dry, solid, well bonded, properly cleaned and then primed with ARDEX P-82 Ultra Prime.

Jobsite temperatures must be consistent with those recommended by the manufacturer of the floor covering to be installed, but in no case should the surface temperature of the substrate be less than 50°F. For further information, please refer to the ARDEX Substrate Preparation brochure.

Note: This product is intended for interior use over dry substrates only. Do not use in areas of constant water exposure nor in areas exposed to permanent or intermittent substrate moisture, as this may jeopardize the performance of the underlayment and the floor covering system. This product is not a vapor barrier and will allow free passage of moisture. Follow the directives of the floor covering manufacturer regarding the maximum allowable substrate moisture content and test the substrate prior to installing ARDEX SD-P.

Always install an adequate number of properly located test areas, which include the finish flooring, to determine the suitability of the product for its intended use. As floor coverings vary, always contact and rely upon the floor covering manufacturer for specific directives.

RECOMMENDED TOOLS
ARDEX T-1 Mixing Paddle, ARDEX T-10 Mixing Drum (or a 5 gallon container and an ARDEX T-2 Mixing Paddle), wooden or magnesium float, steel trowel, and a 1/2" heavy-duty drill (minimum 650 rpm.)

PRIMING
Standard absorbent concrete: No priming required.

Non-porous floors, such as terrazzo, ceramic and quarry tile, and burnished concrete: Prime with ARDEX P-82 Ultra Prime. Mix Part A (red) with Part B (white) and apply with a short-nap or sponge paint roller, leaving a thin coat of primer no heavier than a thin coat of paint. Do not leave any bare spots. Brush off puddles and excess primer. Allow to dry to a thin, slightly tacky film (minimum 3 hours, maximum 24 hours.)

Caution: ARDEX P-82 must be applied in a thin layer within one hour of mixing. A thick application will produce a soft and rubbery surface which can result in cracking of the ARDEX SD-P.

Note: Low surface temperatures and/or high ambient humidity require a longer drying time for ARDEX primers. Do not apply ARDEX SD-P until primer is dry.

MIXING
Mix one 40 lb. bag of ARDEX SD-P with 4 quarts (3-1/3 liters) of water. For a 20 lb. bag, use 2 quarts (1-2/3 liters) of water. Put the water in the mixing drum first, then add 1 bag of ARDEX SD-P while mixing with an ARDEX T-1 Mixing Paddle and a 1/2" heavy-duty drill (minimum 650 rpm.)

Mixing small batches: Mix 3-1/2 parts powder to 1 part water by volume.

INSTALLATION
Apply ARDEX SD-P with a wooden or magnesium float. When ARDEX SD-P starts to harden (approximately 15 minutes at 70°F), finish the surface with a steel trowel to the required smoothness.

THICKNESS OF INSTALLATION
In large areas, ARDEX SD-P can be installed from a featheredge up to 1”, and up to 3” with the addition of proper aggregate (in areas up to 4 sq. ft.).

For areas with a thickness greater than 1”, mix ARDEX SD-P with washed and well-graded 8”-4” pea gravel. Mix ARDEX SD-P with water first, then add up to 1 part by volume of aggregate, mixing until the aggregate is completely coated. Do not use sand. If aggregate is wet, reduce the amount of water to avoid overwatering.

FLOORING INSTALLATION
As soon as the ARDEX SD-P can be worked on without damaging the surface (usually after 1 hour), standard floor coverings such as ceramic tile, VCT and sheet vinyl, and carpeting can be installed. Parquet, athletic flooring and flooring requiring special adhesives (such as epoxies or urethanes) which can be sensitive to the presence of moisture can be installed after 16 hours. All flooring adhesives which are compatible with concrete are compatible with ARDEX SD-P.

LIMITATIONS
ARDEX SD-P is for interior use only. Do not use in areas subject to standing water. Install suitable floor covering as above. Do not use as a wear surface.

NOTE
ARDEX SD-P is a cementitious material. Observe the basic rules of concrete work. Do not install below 50°F surface temperature. Install quickly if subfloor is warm and follow hot weather precautions available from the ARDEX Technical Service Department. Never mix with cement or additives other than ARDEX-approved products. DO NOT OVERWATER !

TECHNICAL DATA

Coverage: A 40 lb. bag covers approximately 40 sq. ft. at 1/8" thickness, 20 sq. ft. at 1/4", etc. A 20 lb. bag covers approximately 20 sq. ft. at 1/8" thickness, 10 sq. ft. at 1/4"

Mixing Ratio: 4 quarts of water per 40 lb. bag. 2 quarts of water per 20 lb. bag. Smaller batches: 1 part water per 3-1/2 parts powder p.b.v.

Initial Set: (ASTM C191) Approx. 15 minutes at 70ºF

Final Set: (ASTM C191) Approx. 1 hour at 70ºF

Compressive Strength: (ASTM C-109/mod.) 2400 psi after 1 day 4200 psi after 28 days

Flexural Strength: (ASTM C348) 1000 psi after 28 days

Flammability: (ASTM E-84) Flame spread: 0 Fuel Contribution: 0 Smoke development: 0

All data based on a mixing ration of 1:3.5 p.b.v. at 70ºF

Packaging:
40 lbs / 18 kg bags.
20 lbs / 9 kg bags.
Storage: Store in a cool, dry area. Do not expose bags to sun.
Shelf Life: Six months.