Everflex Polyurethane Supaprime

When should I use Everflex Supaprime?
Use it to prime porous substrates before you apply Adheseal sealants or Everflex membranes. It penetrates concrete, masonry, render, and timber so the coating holds a reliable long-term bond instead of delaminating.

How do I know if my substrate is porous?
Place a coin-sized puddle of water on the surface. If it absorbs within two minutes, the substrate is porous and Supaprime suits it. If the puddle remains, the substrate is non-porous and needs a different primer.

How long until I can overcoat?
Wait until the film is tacky rather than wet, following the timing in the current technical data sheet. Pot life is short, so only mix and apply what you can use promptly.

Can I use it under waterproofing membranes?
Yes. It is a dedicated bonding agent for Everflex WPUV, HVUV, WPM Fast cure, and Aqua-Ban membranes, and for Adheseal PU, MS, and silicone sealants.

What cleans it up?
Clean tools and wet spills immediately with Acetone; Xylene is also specified. Once cured, the primer can only be removed by mechanical means.

Single-part, moisture-curing polyurethane primer for porous building substrates. Very low viscosity (30-60 cps) gives deep penetration; it consolidates loose or dusty particles and forms a high-adhesion foundation. Formulated as a dedicated bonding agent for Adheseal PU15, PU25, PU240, and PU50 sealants, Hi-Flex MS sealants, S100, N40, and N70 silicones, and Everflex WPUV, HVUV, WPM Fast cure, and Aqua-Ban membranes. Dries quickly to a translucent amber film, resisting mould and mildew in hot and humid service environments.

Test porosity first: place a coin-sized puddle of water on the surface. If it absorbs within two minutes, the substrate is porous. Surfaces must be structurally sound, dry, clean, and free of dust, oils, grease, curing compounds, and flaking material. Where mechanical preparation is required, dry diamond grind to an open porous surface and vacuum thoroughly. Apply by brush or roller, keeping the primer wet on the surface for 2 minutes. Exceptionally porous substrates may require a second coat. Overcoat once the film is tacky and no longer wet. Clean tools and wet spills immediately with Acetone; Xylene is also specified. Cured primer must be removed by mechanical means.

Not for areas subject to hydrostatic pressure or rising damp; use Everflex VBS or Megapoxy H there. Not for application on damp, wet, or contaminated substrates, during rain, or when rain is imminent. Not for long-term UV exposure; UV resistance is limited and the film must be overcoated. Do not apply when application humidity is 85% or higher. Do not use solvents or acid etching to clean the subfloor before priming.

• Suits: Concrete cured at least 28 days with release agents removed, pre-cast concrete, 3:1 sand cement screeds, C-Bed, masonry and render cured at least 4 days, cement sheeting, underlay, external weatherboard, blue board, wet-area plasterboard, Villaboard, timber flooring including Type A structural plywood, brickwork, and Hebel aggregate blocks.
• Not for: Damp or wet substrates, areas with hydrostatic pressure or rising damp, and long-term UV exposure without overcoat.
• Always: Confirm porosity with the water test before priming.