Ceresit CT 100 Impactum - Adhesive
What is Ceresit CT 100?
Ceresit CT 100 Impactum is a high-performance, ready-to-use, fibre-reinforced dispersion mortar designed for creating an impact-resistant basecoat on EPS (polystyrene) insulation boards. It is part of the Ceresit Impactum system, offering the highest level of mechanical durability (exceeding 100 Joules of impact resistance with specific mesh combinations) and allowing for direct application of renders without an additional primer.
| Technical Specification | Value / Detail |
|---|---|
| Material Base | Aqueous synthetic resin dispersion with fibers |
| Primary Use | High-impact basecoat on EPS/XPS boards |
| Coverage (Single Mesh) | Approx. 2.5 – 3.0 kg/m² |
| Impact Resistance | > 100 Joules (in Impactum System) |
| Key Benefit | No primer needed before plaster application |
| Application Temp | +10°C to +25°C |
| Features | Highly flexible, hydrophobic, machine applicable |
- Why choose Ceresit CT 100 over cement-based basecoats?
Ceresit CT 100 is significantly more flexible and durable due to its specialized fibre reinforcement (carbon, glass, and polyacrylamide fibres) and resin base. It is designed for areas of extreme mechanical loads and resists thermal stresses and cracks far better than rigid cement mortars. - Do I need a primer before applying render over CT 100?
No. One of the main advantages of CT 100 is that it does not require the use of a primer like Ceresit CT 16 before applying the final plaster. This saves an entire application step and drying time on site. - Can CT 100 be used to repair damaged render?
Yes. CT 100 can be used for fixing damaged or cracked existing insulation systems. It fills holes and cracks up to 2mm in width and provides a strong, flexible repair when used with an embedded piece of mesh.
Step by Step installation
- Substrate Prep: Ensure EPS boards are fixed, sanded flat, and free of dust.
- Mixing: The product is ready-to-use. Simply mix the tub until homogenous. Up to 1% water can be added if necessary for consistency.
- Application: Spread the mortar evenly on the boards using a notched trowel (6-8mm teeth).
- Mesh Embedding: Immediately embed the fiberglass mesh into the wet compound with a trowel, ensuring a minimum 10cm overlap.
- Drying: Allow to dry for 24-48 hours before applying the final render.
- Pro-Tip on Location: This product is ideal for ground floors, entrances, and parking zones where impacts are likely. Its high impact resistance prevents costly damage.
- Pro-Tip on Efficiency: Using CT 100 eliminates the primer step entirely, significantly speeding up the EWI installation process compared to traditional cement-based basecoats.
- Pro-Tip on Color: CT 100 can be tinted in the mass using Ceresit pigments, which helps ensure color consistency with the final render finish.