HIGH QUALITY neutral cure silicone. Eliminates the need for grouting. Excellent adhesion to most building materials. Compatible with all types of lead - milled, rolled, sand cast, water-cooled) , as well as other metals, brickwork, concrete, granite, marble, slate, cement, stone and roofing tiles. Stain free on most substrates. Lead grey colouring. Good UV and weather resistance. Forms a watertight and permanently flexible seal. Roofing joints. Sealing lead flashing into brick, stone or concrete. Joints on gutters, downpipes and venting. Steel roofing. Sealing overlaps in rigid sheet roofing. Excellent adhesion. Stain free. Good UV resistance. Weather resistant.