abm Waterstop - shower tray, bath & kitchen worktop flexible seal upstand. The first and ONLY seal to successfully and permanently prevent leaks WITHOUT THE NEED FOR SILICONE SEALANT. No more mess, no more black mould, no more constant re-application and maintenance. Absolutely no leaks. Quick and easy to fit. High quality product. 10 year warranty. No fuss, no mess, no worries. Fit it once, and Forget It.