Surface preparation - For best performance and to maintain guarantee, DEPENDABLE PRIMER SL must be used on all surfaces. (Use of other primers voids all warranties.) All supporting surfaces shall be structurally sound, solid and stable. They shall be free of dust, oil, grease, paint, tar or other contaminants that may act as a bond breaker. Application over textured surfaces will give the best bond. Concrete that has been steel troweled should be etched or bead blasted to give a suitable bonding 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. Subsurface must be essentially watertight, as SKIMFLOW RS is extremely flowable. Make sure any holes, cracks, etc. that would permit material through to a lower level are patched, caulked or filled prior to priming.

Use a long-handled roller, mop, or paint brush at full
PRIMER SL strength. Do not dilute. Do not cover until tacky and nearly dry (about 1 hour).

Use a clean mixing container, pour in proper amount of clean, cool water, and add powder slowly. Water/powder ratio is 6-1/2 - 7 quarts of water to 55 pounds of powder (3.5 parts powder to 1 part water by volume, 4 parts powder to 1 part water by weight). Mix with a slow mixer at 150 RPM using a mixing paddle or similar tool designed to avoid air entrapment. Mix 2-3 minutes to a homogeneous lump free mixture. Do not shake.

SKIMFLOW RS can be mixed in large quantity in mortar mixers or special pumps or in smaller quantities (up to 3 bags) in a 40-80 gallon container.

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. A screen may also be used in large scale mixers.

Pump or pour entire container of mix on floor as quickly as possible. Do not over-water, and do not retemper or add water. Dependable SKIMFLOW RS Underlayment is highly flowable for at least 10 minutes at 70 ° F (21 ° C). It can be moved with a screed set to an appropriate depth. Material can be worked or walked through after 10 minutes, but may require smoothing. Once SKIMFLOW RS starts to set (about 30 minutes), stay off floor until set. If a fine edge is desired, edge should be steel troweled after initial set but before completely hard. The underlayment hardens in 2 hours and is ready for floor covering within 4 hours. 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 screed set to the desired depth or lightweight float or straightedge. Any imperfection can be smoothed by surfaced troweling or drawing a straightedge over the surface.

Designed for interior use. Material can be pumped, but mixing must be continuous and pump and hose should be cleaned immediately, as SKIMFLOW RS is a fast-set material.

Do not use:

Where either surface or air temperature falls below 40°F (4.4°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.

Where hydrostatic pressure or excessive moisture conditions exist.

Over particle board, presswood, masonite, chipboard, Luaun, or similar dimensionally unstable materials or any substrate not well bonded or free of movement.

Over metal, lightweight (acoustical) concrete or other gypsum floor patches and materials, petroleum or solvent residue or spills, or other contaminants.