CERESIT CS 25 EXPRESS is a high-quality transparent sanitary silicone sealant in a 300 ml cartridge for sealing joints and expansion gaps in wet rooms. Made from 100% silicone, it is ideal for corners, around bathtubs, shower enclosures and sinks, plus the wall-to-floor connections. It bonds strongly to glass, ceramics, enamel, tiles and aluminium without a primer.