SKIMFLOW® HIGH PERFORMANCE is an exciting, unique polymer modified specialty cement self-leveling underlayment for use over virtually all interior surfaces. Pumpable or pourable, SKIMFLOW® HIGH PERFORMANCE delivers high strength, good water resistance and outstanding adhesion. Applications from nearly a featheredge up to 3-inch depth can be achieved in a single pour. SKIMFLOW® HIGH PERFORMANCE remains flowable for nearly an hour, yet will withstand foot traffic at any depth in about two hours. This product offers high density, yet less finished weight and more flexibility than Portland cement self-levelers.
Features and Benefits
- Outstanding flexural strength against standard cementitious products
- Mildewcide included
- It is suitability for plywood subfloors
- Cover virtually any surface (especially lightweight and gypsum subfloors).
- Durable high strength specialty cement
- Outstanding heal
- Long working life – 45-60 minutes
- Non-alkaline – adhesive friendly
- Non-staining – mildewcide protected
- Thickest single pour – over 3-inches
- Withstands construction/renovation traffic
- Best over suspended substrates
- As little as 1/8” coverage over other surfaces (example: radiant heat tubing)
- Ready to use
- Will not crack, use over older gypsum subfloors
- Elimination of dusting/adhesion problems
- Added antimicrobial that prevents mildew
SKIMFLOW® HIGH PERFORMANCE
- 40 lb. (18 kg.) Bag kraft paper, double wall bag
- 5 gallon pail (19 L) with pour spout
- 1 gallon bottle (3.8 L) with pour spout
To maintain warranty, subfloor must be properly primed. Use DEPENDABLE PRIMER SL™ on all surfaces. All supporting surfaces shall be structurally sound, solid,free of movement and well bonded. They shall be free of dust, oil, grease, tar or other contaminants that may act as a bond breaker. Do not apply over single stripwood floors or over wood subfloors prone to excessive swelling (not exterior glue or “underlayment” grade). Porous substrates will require more than one coat. Make sure that the substrate is properly primed/sealed before continuing.
Remove all foreign matter by mechanical means. Floor must be free of efflorescence and excess moisture. To check moisture, test with a calcium chloride test (ASTM F1869), or relative humidity (insitu probe) test (ASTM F2170). To correct moisture problems see DEPENDABLE’s moisture protection products.
Subsurface must be essentially watertight as SKIMFLOW® HIGH PERFORMANCE is extremely flowable. Make sure any holes, cracks, etc. that would permit material through to a lower level are patched or filled with DEPENDABLE WHITE SKIMCOAT™ or POLYSKIM® prior to priming.
Application over textured surfaces generally gives best bond. Extremely smooth, glazed tile may be abraded. Steel trowelled concrete can be scarified or bead blasted to give a suitable surface. A test patch for adhesion should be performed if the installer is in doubt. Before starting installation, establish the level around the area to be filled with a transit, level or laser device. Mark a “do not exceed” level around room or area perimeter by snapping a line or marking a minimum level by setting coated nails or screws just below the level to be achieved.
Use a long handled roller, soft bristle broom or paint brush to apply DEPENDABLE PRIMER SL™ at full strength. Do not dilute. Do not cover until very tacky or dry (about 1 hour).
Mix 1 bag SKIMFLOW® HIGH PERFORMANCE into 1 gallon (3.785 liters) cool clean water. (10 lbs. to 1 qt. water or 5kg. to 1 liter water). SKIMFLOW® HIGH PERFORMANCE can be mixed in large quantity in mortar mixers or special pumps or in smaller quantities (up to 3 bags) in a 20-40 gallon container. Use only a very clean mixing container that does not contaminate SKIMFLOW® HIGH PERFORMANCE with other material. Pre-dampen container to provide proper first mix. Pour in proper amount of water and then add powder while mixing. Do not over-water. If a problem is encountered with the mixing device getting a lump and powder free mix, try starting with 2/3 of proper water, adding powder until just wetted, then adding remainder of water and thoroughly mixing. Mix with a D-1 mixing paddle or similar tool or device designed to avoid air entrapment at a slow mix (about 150-450 RPM). Mix for at least 2 minutes, but no longer than 3 minutes to a homogenous lump-free mixture. Do not shake. To check flow rate, pour 8 oz. (236 ml) of mixed material onto a smooth impervious or primed substrate. The resulting patty size should have a diameter of approximately 12.5 inches (31.75 cm).
Extending mix with aggregate: Although SKIMFLOW® HIGH PERFORMANCE may be used as thick as 3” in a single neat layer, when filling an area to a thickness of 1” or greater, SKIMFLOW® HIGH PERFORMANCE may be extended with aggregate. This will provide a rougher finish,and a neat second layer of SKIMFLOW® HIGH PERFORMANCE would be required for a very smooth finish. First mix SKIMFLOW® HIGH PERFORMANCE neat as previously instructed. Then slowly add 15 lbs. of well-graded washed silica aggregate 3/8” or less in size (pea gravel) per 40 lb. bag of SKIMFLOW® HIGH PERFORMANCE. Ensure the aggregate is completely coated. SKIMFLOW® HIGH PERFORMANCE mixed with aggregate is less flowable and will require additional work to place and level the material. Allow mix to harden and dry before applying a neat layer.
Pump or pour contents onto floor. Because SKIMFLOW® HIGH PERFORMANCE is very flowable, allow it to build in one area until it reaches at least desired depth and maintains that depth even as material flows away. Begin at a corner of room or at a deep part of fill. Plan the pour before starting. Either work back and forth along a line of the room or from the center of the fill outwards in all directions to keep pouring against the freshest material possible. Lightly work the transition points between pours and material over or under desired depth with a D-2 screed or spreader set to the desired depth or lightweight float or straightedge. Material should remain highly flowable and can be walked in for over 45 minutes at normal temperatures. Any imperfection can be smoothed by surface trowelling or drawing a straightedge or D-3 smoother over the surface. As material gets stiffer and begins to gel, it may be smoothed or trowelled to a fine edge. Once material begins to gel, stay off the area for about 1 hour, after which floor should bear foot traffic. In very hot or windy conditions, protect from wind and mist fog floor. Direct sunlight, heat and wind can cause rapid drying of the product which may reduce working time. To avoid rapid drying, provide protection against these elements. Let material continue to dry before covering until evaporative moisture lessens. Moisture level may be checked by a surface moisture meter, a plastic film taped to the floor, or a plastic bucket left on the floor and the area carefully observed for residual surface moisture upon removal. In thin 1/4” application, may be covered in 4-24 hours depending on drying conditions (temperature, humidity, thickness) and requirements of adhesive and floor covering. For impervious coverings (vinyl, laminate, etc.) be sure SKIMFLOW® HIGH PERFORMANCE is thoroughly dry (at least 16-24 hours). Pours deeper than 3/8” require longer time or forced drying.
Multiple lifts: SKIMFLOW® HIGH PERFORMANCE may be placed in multiple lifts or layers. Allow the previous layer to harden and dry until there is no discernible evaporation. Once dry, prime again with PRIMER SL™ and apply the next SKIMFLOW® HIGH PERFORMANCE layer. Remember thicker areas of product take longer to dry.
NOTE: Temperature and humidity levels affect the drying characteristics of SKIMFLOW® HIGH PERFORMANCE. However, unlike Portland cement materials, SKIMFLOW® HIGH PERFORMANCE may be force dried with the use of heat or fans once set.
For Interior use only. Do not use…
• Where hydrostatic pressure (water) is present or moisture emissions exceeds level permitted for installed floor covering.
• Where surface or ambient temperature falls to or below 45°F 72 hours before or after installation.
• Over presswood, particle board, masonite, chipboard, single stripwood floors, luaun or similar dimensionally unstable materials susceptible to moving or swelling.
• As a trowelled patch or at less than natural minimum flow thickness.
• Exterior, exposed applications or as a wear surface.