Damp proofing compound CERESIT CT17 10L – deep penetration waterproofing treatment

Ceresit deep penetration primer CT 17 is a professional priming product designed to consolidate and prepare mineral substrates before tiling, floor installation, plastering or filling. The formulation improves surface adhesion while reducing substrate absorbency, ensuring uniform and safe application of subsequent layers. CT 17 is particularly useful where fast drying of adhesives or fillers may occur due to weak or highly porous bases.

Advantages

The water-dispersed synthetic resin in CT 17 penetrates deeply into the material structure, strengthening the surface without significantly increasing its overall mechanical strength. The product is suitable for both interior and exterior use on render, concrete, solid floors and other absorbent substrates. It is recommended for gypsum, aerated concrete, chipboard and untreated gypsum plasterboard. The yellow tint provides visual control of application quality on uneven surfaces.

Suitable for

• Preparation of mineral substrates before ceramic tile adhesive application
• Priming floors prior to screed or floor coverings
• Stabilising weak or highly absorbent plaster and gypsum surfaces
• Use on concrete, render, aerated concrete, chipboard and untreated gypsum boards

Key specifications

• Base: water dispersion of synthetic resins
• Density: approx. 1.0 kg/dm³
• Working temperature: +5 to +25 °C
• Drying time: approx. 2 hours depending on substrate
• Consumption: 0.1–0.5 l/m² depending on substrate absorbency
• Suitable for interior and exterior use
• Application: brush
• Volume: 10 L

How to use

Ensure the substrate is dry, load-bearing and free from dust, grease and other contaminants that reduce adhesion. Very absorbent or weak substrates can be diluted with water up to 1:1. Apply CT 17 with a brush in one or more coats using a wet-on-wet method. Allow the primer to dry — average drying time is about 2 hours but may vary with substrate absorbency and environmental conditions.

Usage recommendations

Apply within the recommended temperature range (+5 to +25 °C). Ensure uniform coverage using the yellow tint as a guide. Do not apply on frozen surfaces or during heavy rain when used outdoors.