Improves the adhesive capacity of XtraGrip TM Green mirror adhesive on porous surfaces (also suitable for use with other silicone adhesives or MS polymers). Xtraprime is also recommended to prime surfaces subject to humidity. Xtraprime is thin and transparent. Instructions for useProcessing temperature +5°C to +25°C. The subsurface must be clean, dry and free of dust and grease. Generously apply Xtraprime undiluted with a brush. Allow Xtraprime to dry thoroughly (approx. 60 min. at +20°C / 65% relative humidity) before applying adhesive. To ensure that the subsurface is completely covered, a second coating of Xtraprime can be applied. After Xtraprime has been applied, protect the surface against moisture and dirt. Covers approx. 5 m²/litre, depending on the condition of the subsurface.