Silic8 PS2 primer is a concentrated liquid designed to soak in and reduce suction in many backgrounds whilst still remaining breathable. Penetrating solutions can be used to consolidate and stabilise problematic surfaces and backgrounds providing additional bond strength for the next coat. Unlike most primers, PS2 does not contain plastics or emulsions; it is completely mineral so you won't smell any odours or breathe in any VOC's. Lime Green know breathability is vital, so Silic8 PS2 primer is independently tested for vapour diffusion to reassure you that water vapour will not be trapped in the fabric of your building. Some typical substrate types: Masonry backgrounds, magnesium silicate boards, historic or new plasters (lime, cement or gypsum), stone, wood, and wood type boards, terracotta and some ceramic tiles and paints.