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PREPARATION AND APPLICATION
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| Surface preparation - All supporting concrete subfloors shall be structurally sound and solid. They shall be free of dust, dirt, oil, grease, paint, tar, curing compounds or other contaminants which may act as a bond-breaker. Mechanically clean the surface by shot-blasting, scarifying or other suitable means. Weak, over-watered or frozen concrete surfaces must be mechanically cleaned down to sound, solid concrete. The use of acid, chemical degreasers or solvents is not an acceptable method of cleaning the surface. Concrete that has been power-troweled will require shot-blasting to produce a suitable bonding surface. |
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EDGES
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Edges -All transition points or edges between the existing (remaining) surface and the area to be repaired must be sawcut. The sawcut depth must be at least the thickness of the repair or topping. It is preferred, however, to create the sawcut slightly deeper (1/8"-1/4") than the intended topping. This will help the WEARFLOW lock itself into place, creating a smooth, durable transition point.
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PRIMING
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Priming -Using a soft bristle broom, apply PRIMER SL full strength at a rate of 250 sq. ft. per gallon. Evenly coat the entire surface leaving no bare spots. Allow to dry and become tacky (minimum 1 hour, maximum 24 hours). Note: Primer not covered beyond 24 hours will require a second application of PRIMER SL. Do not apply in excessive amounts and avoid puddling or pooling.
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CRACKS
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Cracks -All cracks in new or old concrete slabs should be repaired to prevent their telegraphing through to the new topping. Normal shrinkage or dormant cracks should be cleaned and filled with DEPENDABLE SKIMCRETE XL or FEATHERCRETE. Sawcuts or control joints may be thoroughly cleaned and filled with a cement-based patch material such as SKIMCRETE XL or FEATHERCRETE. The installer may wish to plan sawcuts into the finished WEARFLOW based on existing sawcuts. This will allow any cracking to occur in straight lines in the finished topping which will be aesthetically appealing.
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EXPANSION/ISOLATION JOINTS
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Expansion/Isolation Joints - These joints are designed to allow independent movement between slabs. They must be allowed to maintain their integrity. Do not cover an expansion joint with WEARFLOW. If the expansion joint is filled with a patch or other non-flexible material, expect cracking and failure at this area.
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MIXING
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Mixing - Optimum water ratio is 4.75 quarts of cool clean water to each 50 lb. bag of WEARFLOW. The amount of water may vary slightly. To reduce flow, use 4.5 quarts, and if conditions require additional flow, use 5 quarts per 50 lb. bag. Never use more than 5 quarts of water per 50 lb. bag. Do not re-temper. Slowly add each bag of DEPENDABLE WEARFLOW to water while mixing with a 1/2" drill (150-450 rpm) equipped with a D-1 paddle. Always add powder to water. Mix thoroughly a minimum of 2 minutes with a maximum of 3 minutes to a homogeneous lump-free mixture. DO NOT OVERWATER.
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APPLICATION
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Application - Pour entire container of mix on the prepared floor as quickly as possible. WEARFLOW will have approximately 10 minutes flow rate with a 15-minute work time. Immediately after pouring mix, spread with D-2 spreader. Always plan pours as to apply new mix next to freshest material possible. Smooth irregularities and transition points using D-3 smoother. DEPENDABLE WEARFLOW is a fast-setting material. Smoothing fresh material will yield the best results. Smoothing or troweling WEARFLOW 5-10 minutes after placing may result in a shade variation. DEPENDABLE WEARFLOW can be installed a minimum of 1/4" to a maximum of 2" in a single application.
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SEALING
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Sealing - WEARFLOW exhibits superior abrasion resistance, however, sealing or coating may be preferred to allow easier maintenance or chemical protection. WEARFLOW is a cement-based material and therefore is affected by many of the same chemicals that affect Portland cement concrete. When using WEARFLOW in an exterior application, the surface should be sealed with an appropriate sealer. Silicone or acrylic based products are recommended..
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LIMITATIONS
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LIMITATIONS
Designed for interior use and exterior use when sealed against salt exposure. Material can be pumped, but mixing must be continuous and pump and hose should be cleaned immediately.
Do not use...
Where either surface or air temperature falls below 50°F (10°C) at or within 72 hours after installation.
When finished floor is subject to freeze (32°F or 0°C) any time within 7 days of installation.
Where hydrostatic pressure or excessive moisture conditions exist. |
