SikaCeram-621 FlowFix Jointing Compound 15KgSikaCeram 621 FlowFix is a controlled, cementitious flowable jointing grout which is applied by mixing with water on site and poured over joints with ease and worked into other exposed joints by squeegee. Once dry the surplus is simply washed off. SikaCeram 621 FlowFix Jointing Compound is a highly workable product that is non permeable once cured. For use with porcelain or ceramic paving. Suitable for joints between 3 10mm wide and 15mm in depth.