Sealant silicone CERESIT CS25 Ocean (88) 280 ml — sanitary and construction silicone

CERESIT CS25 Ocean (88) 280 ml is a sanitary and construction silicone sealant supplied in a cartridge for use with a standard caulking gun. Formulated for flexible, water-resistant joints, this silicone is intended for sealing sanitary fixtures, bathroom and kitchen joints, window perimeters and general gap sealing in interior and exterior applications where a mold-resistant sanitary finish is required.

Advantages

This silicone offers elastic joints that accommodate small movements in building elements while maintaining a watertight seal. It resists household moisture and typical bathroom conditions, providing a smooth, finishing surface that can be tooled to neat lines. Supplied in a 280 ml cartridge, it is compatible with manual or pneumatic caulking guns for straightforward application.

Suitable for

• Sealing joints around washbasins, bathtubs and showers
• Sealing kitchen sinks and worktop edges against moisture
• Window and door frame perimeter sealing where flexible joints are required
• General finishing and gap sealing in sanitary and construction tasks

When it may not be suitable

This product is a neutral-curing silicone designed for sanitary and general construction use; it is not suitable for structural glazing or load-bearing structural joints. It may not adhere well to some plastics, polyethylene, polypropylene or PTFE without appropriate surface treatment or primers. For applications requiring paintability, specific paintable sealants should be chosen because typical silicone sealants are not paintable.

Key specifications

• Form: cartridge (280 ml)
• Curing type: neutral-cure silicone providing flexible joints
• Primary properties: water-resistant, mold-resistant formulation for sanitary use
• Application temperature range: suitable for common indoor and outdoor temperatures (follow manufacturer guidance for exact limits)
• Typical uses: sanitary joints, kitchen and bathroom sealing, window and door perimeters, general gap filling

How to use

Ensure surfaces are clean, dry and free from dust, grease and loose particles. Cut the cartridge nozzle to the required bead size and use a caulking gun to apply a continuous bead into the joint. Tool the seal within the product skin time to obtain a smooth finish and ensure full contact with joint edges. Allow the sealant to cure undisturbed according to ambient temperature and humidity until a fully elastic joint is achieved. Remove uncured excess with a suitable solvent; once cured, silicone must be removed mechanically.

What to consider before purchase

• Verify compatibility with the substrate (tiles, ceramics, many metals, glass); test or use primer for difficult plastics
• Confirm color and finish required for the visible joint
• Consider the bead size and quantity needed: 280 ml cartridge capacity per cartridge
• Check whether the application requires a paintable or structural sealant instead of silicone

Usage recommendations

For best results, apply at recommended temperatures, tool the joint immediately after application, and allow adequate curing time before exposure to water. Use appropriate primers for problematic substrates and follow all safety instructions on the product label.