CERESIT CE 40 Aquastatic Natura is a flexible, waterproof grout supplied in a 5 kg package, formulated for filling and protecting joints between ceramic, porcelain and natural stone tiles. The product creates an elastic, water-repellent joint layer that helps maintain tile installations in wet environments by reducing water penetration and accommodating minor substrate movement.
Advantages
The grout combines flexibility and water resistance to protect joints against cracking and moisture ingress. Its composition is designed to adhere well to common tile materials while remaining elastic to absorb small movements. The 5 kg packaging is suitable for moderate repair or renovation jobs and offers a consistent texture for uniform application and finishing.
Suitable for
- Bathroom walls and floors where waterproof jointing is required
- Kitchen splashbacks and worktop surrounds exposed to moisture
- Balconies, terraces and other outdoor areas with ceramic or porcelain tiles
- Natural stone installations provided the grout shade matches and is compatible with the stone
When it may not be suitable
This grout is intended for tile joints and is not a substitute for structural waterproofing systems or liquid-applied membranes. It may not be suitable for extremely wide joints beyond the product's recommended joint width or for substrates with heavy ongoing movement where specialized expansion joints are required. For continuous immersion situations or areas with aggressive chemical exposure, consult technical guidelines to confirm suitability.
Key specifications
- Form: cementitious flexible grout
- Package size: 5 kg
- Water resistance: designed to provide water-repellent joints for wet areas
- Application: suitable for ceramic, porcelain and natural stone tiles
- Performance: elastic joint to accommodate minor movement and reduce cracking
How to use
Prepare the substrate and ensure tile adhesive has fully cured before grouting. Mix the grout powder with water following the manufacturer’s recommended water-to-powder ratio until a homogeneous, lump-free consistency is achieved. Apply the grout using a rubber float, pressing the material firmly into the joints and removing excess grout from the tile surface. After initial set, clean remaining haze with a damp sponge and allow the grout to cure undisturbed for the time indicated in the product instructions. Protect finished joints from water and heavy loading until fully cured.
What to consider before purchase
- Confirm the recommended joint width and ensure compatibility with your tile type (ceramic, porcelain, natural stone).
- Verify the required grout color and any need for sealing on sensitive natural stones.
- Estimate the required quantity based on tile size, joint width and area to avoid multiple purchases.
- Check technical documentation for curing times and suitability for outdoor use or freeze–thaw conditions.
Usage recommendations
Use the grout in well-ventilated conditions and follow the manufacturer’s mixing and curing guidelines. For wet-room installations, allow full curing before exposing joints to continuous water contact. When working with natural stone, test a small area first to ensure color compatibility and consider applying an appropriate sealer if recommended.
