Mapei Primer G Synthetic Resin Primer (Choice Of Size)

Primer G is a synthetic resin-based primer which, once applied to any surface, dries to form a flexible, compact, shiny coating which consolidates the surface, where needed. Primer G also improves the adhesion of smoothing compounds, paint, adhesive for wallpaper, adhesive for tiles and mortar for renders.

The film of Primer G on the surface of gypsum or cement prevents any chemical reaction between sulphates and the cement aluminates of gypsum which, in the presence of moisture, leads to the formation of the salt “ettringite’’ which is the cause of the separation of the two elements.

The use of Primer G when papering allows for reducing the substrate’s absorption and, as a result, the amount of glue used, thus making wallpaper removal much easier. When used before applying sprayable plasters, Primer G prevents over-rapid absorption of water by the substrate, prolongs workability time and helps prevent shrinkage cracks. When used before the application of self-levelling compounds, 
Primer G reduces the formation of air bubbles and helps prevent over-rapid drying making self-levelling easier. Primer G is not flammable and can therefore also be used in closed, unventilated environments without any precautions having to be taken.