Everbuild 505 Quick Drying Plasterers Grip Coat contains a fine aggregate to provide an improved key before applying the plaster skim coat on many smooth and difficult surfaces including glossy painted surfaces, textured paints, particle board, MDF, waterproof plasterboards, fireboards, pre-cast concrete, glass and even ceramic tiles. Everbuild 505 Grip Coat contains fine aggregates that are suspended in a unique gel to ensure easy application by roller or brush and an even spread of aggregate, avoiding any weak spots in the key coat and preventing the aggregate particles coming loose during skimming. One easily applied coat will allow over skimming onto surfaces that would otherwise need meshing, removing or keying. Everbuild 505 is blue in colour for easy indication of coverage as you apply.