QA WB (Waterbased) Sealer is a tough & durable water based sealer for concrete, asphalt, pavers, stencilled concrete, exposed aggregate and QA NSC etc..QA WB Sealer is based on state of the art acrylic polymer technology. Its extreme hardness at a Tg (Glass Transition Temperature) of 55⁰C which makes it very resistant to wear including vehicular traffic.
A range of popular colours are available with other colours & colour matching is available on request.
Surface must be clean & free from dirt, grease, oil & any loose materials.Concrete is best to be acid etched with a 4:1 water to hydrochloric acid mix & then thoroughly scrubbed. Then wash off with water or water blast.For surfaces in good condition and previously sealed surfaces, waterblast well or clean & scrub with a surface cleaner then wash off well with water.
For well prepared & porous surfaces priming is not necessary. However, for dense concrete & smooth & glossy previously painted surfaces, priming is recommended. In these cases a number of primers can be used such as QA SB Primer & QA Supa Bond mixed 1:1 with cement. This extra step in uncertain situations ensures maximum adhesion of the coating system.
Apply 2 coats by roller & cut in with a brush or apply by airless spray gun. A coverage of around 10m²/ltr will be achieved per coat giving a total usage with 2 coats of 5m²/ltr.