Ecorend SP15 Silicone Primer - 25kg Fired Earthecorend SP15 Silicone Primer is a ready to use, through coloured primer for use prior to the ecorend SR15 Silicone Thin Coat Render topcoat. The product has been developed to be highly vapour permeable and to control the suction of the substrate, thus preventing any substrate grin through, and can be applied by brush, roller or spray. Specifications Coverage Approx. 3. 2m2 per kg Application Temperature +5Cto 25C for a minimum of 24 hours Unit Size