Sanitary Silicone Sealant CERESIT CS25 Carrara 280 ml, mold-resistant sanitary joint sealant

CERESIT CS25 Carrara is a sanitary silicone sealant supplied in a 280 ml cartridge, formulated for sealing joints and connections in bathrooms, kitchens and other wet rooms. The product creates a flexible, water-tight seal between sanitary fixtures, tiles, bathtubs, shower trays and sinks. Its mold-resistant formulation is intended for long-term use in humid environments and for maintenance of sanitary joints where hygiene and moisture protection are required.

Advantages

The silicone provides durable elasticity that accommodates small movements in joints while maintaining a watertight barrier. The mold-resistant formulation reduces visible fungal growth and helps preserve joint appearance and hygiene. Easy to apply with a standard caulking gun, the sealant cures to a smooth, durable bead that resists moisture and common household cleaning agents.

Suitable for

• Sealing gaps between tiles and sanitary fixtures in bathrooms and showers
• Sealing joints around bathtubs, sinks and shower trays
• Waterproofing connections where constant or intermittent moisture is present
• Use on non-porous surfaces such as glazed tiles, ceramics and sanitary enamel

When it may not be suitable

This sanitary silicone is designed for non-structural sealing and movement accommodation; it is not intended for use as an adhesive for load-bearing connections or structural repairs. It is not suitable for application on substrates that require primer or on highly porous materials where a specific primer or different sealant type is recommended.

Key specifications

• Volume: 280 ml cartridge
• Type: sanitary silicone sealant with mold-resistant formulation
• Curing: neutral-acid/neutral-cure (suitable for sanitary applications and sensitive surfaces)
• Texture after cure: flexible, elastic silicone bead
• Application temperature range: suitable for typical indoor temperatures (check technical sheet for exact range)

How to use

Ensure surfaces are clean, dry and free from dust, grease and old sealant residues. Cut the cartridge nozzle at an appropriate angle and fit into a standard caulking gun. Apply a continuous bead into the joint, maintaining steady pressure to ensure full contact with both sides of the gap. Smooth the bead with a suitable finishing tool or a wetted finger before skin formation. Allow the sealant to cure undisturbed for the time specified by the manufacturer; ventilation can help the curing process.

What to consider before purchase

• Intended use: designed for sanitary joints and wet-room applications, not for structural bonding
• Surface compatibility: best on non-porous surfaces such as glazed tiles, ceramics and enamel
• Color matching: confirm the Carrara shade suits surrounding materials
• Required curing time and application temperature: consider project timeline and ambient conditions

Usage recommendations

For optimal performance, apply CERESIT CS25 Carrara to clean, fully prepared surfaces and use masking tape for neat edges. Allow full cure before exposing the joint to continuous water contact; replace damaged or aged sealant rather than overcoating. When in doubt about substrate compatibility or specific conditions, refer to the manufacturer’s technical datasheet.