Grout CERESIT CE 40 Aquastatic flexible waterproof grout, anthracite, 5 kg

CERESIT CE 40 Aquastatic flexible waterproof grout in anthracite (5 kg) is a polymer-modified tile grout formulated for use in areas exposed to moisture and light movement. The product combines flexibility and water resistance to seal joints between ceramic, porcelain and natural stone tiles. Supplied in a 5 kg bag, this anthracite-coloured grout is intended for interior and exterior applications where a durable, flexible joint fill is required.

Advantages

The grout offers elasticity to accommodate minor substrate or tile movements and contains additives that improve water resistance and reduce water absorption. Its anthracite shade provides a consistent, modern joint colour that resists common staining when properly applied and maintained. The formulation delivers good workability and trowelability for filling joints of various widths and creates a firm, yet slightly flexible, joint after curing.

Suitable for

• Tile joints in bathrooms, showers and wet rooms
• Kitchen floors and backsplashes exposed to splashes and spills
• Balconies, terraces and outdoor tiled surfaces with limited structural movement
• Floor and wall joints where a flexible, water-resistant grout is required

When it may not be suitable

This flexible grout is not intended for heavy structural movement joints or expansion joints that require a dedicated elastomeric sealant. It may not be appropriate for very wide joints beyond the recommended joint width for cementitious grouts; for such cases a different product designed for wide joints should be chosen. When using on certain types of natural stone, testing in an inconspicuous area is recommended to ensure colour and compatibility.

Key specifications

• Form: polymer-modified cementitious grout
• Colour: anthracite
• Package size: 5 kg
• Application: interior and exterior tile joints (floors and walls)
• Properties: flexible, water-resistant after curing
• Suitable joint widths: suitable for standard tile joint widths (follow manufacturer instructions)

How to use

Prepare joints by removing loose material and ensuring surfaces are clean and dry. Mix the grout powder with water according to the manufacturer's mixing ratio until a homogeneous, lump‑free paste is achieved. Apply the grout using a rubber float, pressing it firmly into joints and removing excess material. After initial set, clean tile faces with a damp sponge, taking care not to excavate joints. Allow the grout to cure fully before exposing to water or heavy traffic; follow the manufacturer's recommended curing times and temperature conditions.

What to consider before purchase

• Confirm the anthracite colour matches tile and design preferences; colour may vary slightly after curing.
• Check recommended joint width and substrate movement compatibility for your application.
• Ensure the quantity (5 kg) covers the total joint area; calculate required amount based on tile size and joint width.
• Verify suitability for use on specific natural stones or sensitive surfaces; perform a small test if necessary.

Usage recommendations

For best results, use appropriate personal protective equipment, follow the mixing ratios and working times, and protect newly grouted areas from water and traffic until full cure. Store unopened bags in a dry place and use mixed material within the stated pot life.