Ceresit CX 15 STRONG adheres to both steel and solid, load-bearing, clean and moist concrete, free of substances that may impair adhesion such as: fats, bituminous, dust. Dirt, anti-adhesive substances and paint coatings must be completely removed.
The concrete substrate must be opened-pored, rough and have a good keying structure. Thoroughly pre-wet the concrete, but free of puddles. Check the clearance of mounting element is not less than 20 mm between the edge of mounting hole and anchor.
Add the material into a measured quantity of 2 l of clean water and premix with a compulsory- type mixer or electric drill with stirrer attachment until homogeneous, completely free of lumps. Then add about 0.9 l of water until the appreciate consistency is reached and mix for a further 5 minutes. Apply mortar within 60 minutes. Observe a minimum clearance of 20 mm at every point of the anchoring or of the cavity to be grouted to ensure cavity-free compaction. When filling holes over 50 mm wide, Ceresit CX 15 STRONG should be mix with approx. 6.25 kg of the dolomite aggregate fraction 4/8 mm or basalt fraction 4/8 mm or 8/16 mm, water added to the required consistency. The addition of gravel does not affect setting time, but slightly reduces the strength of the anchorage. The material can be applied mechanically using a pump Pneumix PG 50 or equivalent. Protect fresh mortar against too rapid drying and keep damp for at least 48 hours.