Instantly Seals Leaks In Windows, Guttering, Roofs, Pipes Etc. 1x White Mastic Sealant Spray 300ml. Imagine being able to repair a leak in seconds without hiring expensive plumbers or specialists. With Rapide Mastic Sealant you can simply clean the are to sealed, apply the spray that's it and you have a watertight seal in seconds.
eBay