Browse our range of flashing for watertight roof joints and seams. In our wide range you’ll find lead flashing, code 3 and 4, for a long-lasting seal, and man-made flashing materials too. To keep your newly installed lead flashing protected we have Calder patination oil to help prevent the lead from staining, as well as the material below it. Our flashing is available in a selection of sizes to suit your roofing project, along with flashing tape, clips and sealant.