CERESIT® CR 90 is used for waterproofing concrete and reinforced concrete, brickwork with full-joints and mineral plasters. It can be applied from the possitive (up to 15 m) as well as the negative (up to 5 m) water pressure side. CR 90 allows a proper cooperation with the CERESIT CL 152 Sealing Tape on the connections between walls and floor and expansion joints. CR 90 can also be applied on corners combined with with CERESIT CL 56, CERESIT CL 57 and CERESIT CL 5.Available pack size: 25kg
Substrates must be smooth, absorbent and porous. Dirt, existing layers of low resistance and all previous paint coverings, lime plasters, and substances that impede adhesion must be carefully removed. Corroded joints should be removed up to the depth of 2 cm and refilled with cement mortar. Deep holes and uneven substrates should also be repaired with cement mortars or concrete. CERESIT CR 90 requires the pre-wetting of the substrates before application to the mat-wet conditions.
Sprinkle CERESIT CR 90 into clean, cold water and mix (using a mixer) until the homogenous mass without lumps is obtained:– for brush application – use 8 l water per 25 kg CR 90,– for trowel application – use 6 l water per 25 kg CR 90.The layer should be applied on the damp but not wet substrate. The first layer of CR 90 should be applied crosswise with a brush, the second layer can be applied by brush or a trowel.
Do not mix with other materials, additives or binders. Before finishing the application check if the required thickness of CERESIT CR 90 is achieved. Use CR 90 only in dry conditions and at temperatures ranging from +5°C to +25°C. All the data refer to the temperature of +23°C and relative humidity of 55%. Please note that under other climatic conditions hardening can be accelerated or delayed.
CERESIT CR 90 is used for waterproofing concrete and reinforced concrete, brickwork with full-joints and mineral plasters. It can be applied from the positive (up to 15 m) as well as the negative (up to 5 m) water-pressure side. The CERESIT CR 90 allows a proper cooperation with the CERESIT CL 152 Sealing Tape on the connections between walls and floor and expansion joints. CR 90 can also be applied on corners combined with with CERESIT CL 56, CERESIT CL 57 and CERESIT CL 5
CERESIT CR 90 adheares to load-bearing, solid and clean substrates, free from any substances that decrease adhesion (such as grease, bitumen, dust), namely:– concrete with a minimum class of C 12/15 (over 3 months old),– mineral plasters (cement, cement-lime) with the thickness of >10 mm and cement screeds (strength >12 MPa, over 28 days old),– brickwork with full-joints, and the strength of >6 MPa (over 3 months old).
CERESIT CR 90 is suitable for the light, medium and heavy damp-and waterproofing classes. In case of possible mechanical loads such as pedestrian traffic, the coating should be protected e. g. through the application of the flooring layer or plaster without gypsum content, or by laying the ceramic tiles with the help of CERESIT CM mortars. Deformable structures require the use of flexible products, such as: CERESIT CR 166, CL 50, CL 5 To block water leakages, rapid cement CERESIT CX 1 and CX 5 should be applied. Additionally, CERESIT CR 166 should be used for sealing of the terraces and substrates with heated floors.