to reduce discolouration

without proper preparation before decoration

The natural oil-based and microporous finish does not crack

High Performance Gloss provides great adhesion

Johnstones Trade Alkali Resisting Primer White Size:5l to reduce discolourationDescription Specification Download Shipping & Returns Product Description: Johnstone's Trade Alkali Resisting Primer is a pigmented solvent based primer and sealer for interior and exterior use on new or bare plaster, concrete, cement, render, or wood and metal surfaces. It is suitable for interior and exterior use, and provides exceptional resistance to alkali attack when used as a primer on unpainted surfaces, or as a sealer on powdery substrates.