Bostik Wide Joint Grey Compound is a single-component jointing compound that forms a solid joint once cured. It resists weed growth and sand loss from power washing or mechanical cleaning. Suitable for most domestic paving types, including natural stone, concrete, clay, and terracotta, in joints 5mm to 30mm wide. Water permeable, allowing the paving to drain. Unaffected by salt and freezing conditions when cured. Available in a 15kg size, with a grey color.