Sanitary Silicone Sealant CERESIT MicroProtect CS 25 — melba, 280 ml, mold-resistant

CERESIT MicroProtect CS 25 in melba is a sanitary silicone sealant supplied in a 280 ml cartridge designed for sealing joints in wet and humid environments. The formula is intended for sanitary applications, providing a flexible, waterproof connection that resists mold and mildew. It is suitable for use around baths, sinks, showers, tiles and other sanitary fixtures where long-lasting elastic joints are required.

Advantages

The sealant combines long-term elasticity with water resistance and an active mold-inhibiting system that reduces visible fungal growth in sealed joints. Its ready-to-use cartridge format allows for controlled application with standard caulking guns, and the melba color blends with warm beige and terracotta tones in bathroom and kitchen interiors. The product cures to form a durable, flexible bead that accommodates small movements between surfaces while maintaining a watertight barrier.

Suitable for

• Sealing joints between bath, shower trays and wall tiles
• Sealing around washbasins, bidets and kitchen sinks
• Joints in sanitary rooms, bathrooms and steam-prone areas
• Sealing connections between ceramic, glazed surfaces and enamelled fixtures

When it may not be suitable

This sanitary silicone is formulated specifically for typical sanitary and ceramic applications; it is not intended for structural bonding or use as a gap-filling adhesive for load-bearing connections. It may not adhere optimally to certain plastics, polyethylene, polypropylene or other low-energy surfaces without a primer. Compatibility with painted or untreated porous substrates should be checked before application.

Key specifications

• Color: melba (warm beige tone)
• Package volume: 280 ml cartridge
• Joint movement capability: elastic, accommodates minor substrate movement
• Application type: sanitary silicone for wet areas and sanitary joints
• Properties: water-resistant, mold- and mildew-inhibiting formulation

How to use

Prepare surfaces by cleaning and removing old sealant, grease, soap residues and loose material. Ensure surfaces are dry and free of dust. Cut the cartridge tip to the desired bead size and use a standard caulking gun for application. Apply a continuous bead of sealant into the joint, then smooth the bead with a suitable tool or spatula within the product's skin formation time to ensure adhesion and neat finish. Allow the sealant to cure fully according to ambient temperature and humidity before exposure to water.

What to consider before purchase

• Confirm the melba color matches existing tiles and fixtures in your room.
• Check that substrates are suitable for silicone sealing (ceramic, glazed surfaces, enamelled fixtures).
• For low-energy plastics or painted surfaces, verify adhesion or use a recommended primer.
• Allow adequate curing time before exposing joints to water; follow ambient temperature and humidity guidelines.

Usage recommendations

For best results, apply at temperatures recommended by the manufacturer, keep the joint width appropriate for the expected movement, and tool the bead smooth immediately after application. Regular cleaning of sealed joints and maintaining ventilation in wet rooms will help preserve the mold-resistant properties over time.