What does a universal Primer Mean? A universal primer is a multipurpose coating that prepares a surface for the application of a subsequent coating (often a top coat). A coating that does not adhere to the surface without a primer may lose its protective capabilities. While most primers are designed for a specific surface type and subsequent top coat, in some cases, a universal priming may be more cost-effective or convenient. When selecting a primer for a certain coating application, it's possible that you won't know which coating will be used, or that the primer will be utilised for several priming procedures on different types of surfaces. Here is a product Elastocolor primer from Mapei. It is solvent-based fixing primer with high penetration properties for porous substrates and curing agent for repair mortars. Elastocolor Primer is used to impregnate concrete surfaces repaired with products from the Mapegrout line before smoothing or painting with Elastocolor Paint, Elastocolor Rasante. The product penetrates into porous substrates and ensures excellent insulation and good adherence to the paint that will be applied. Check out best Universal primer in UAE .