Fernox LS-X 50g External Leak Sealer - Silicone Paste

Fernox LS-X is a fast-acting silicone paste engineered as an external leak sealer and jointing compound for both hot and cold water applications, including potable water systems. This ready-to-use formula requires no mixing and works effectively on compression joints and screwed fittings without setting rock hard, allowing joints to be easily undone for future maintenance. The 50g tube delivers reliable performance across extreme temperatures from below freezing to above boiling point, whilst remaining completely safe for drinking water and holding WRAS approval. Unlike conventional sealers, LS-X does not shrink or crack with age, providing long-lasting protection for plumbing installations where flexibility and reversibility are essential.