CN 69

SUBSTRATE PREPARATION

Ceresit CN 69 adheres to all solid, load-bearing, clean and dry surfaces free of substances which can cause separation. Wax coatings, oil, grease and adhesive stains must be removed completely. Concrete floors and cement screeds: Loose and soft layers of the subfloor should be removed mechanically. Clean the surface and remove the dust. Prime substrate with Ceresit R 777 Primer. On screeds dilute Ceresit R 777 1:1 with water, on concrete floors use Ceresit R 777 undiluted. Apply evenly with a lambskin roller. Do not allow the primer to form puddles. A second coat may be necessary on porous, very absorbent substrates after drying. Apply Ceresit CN 69 when the primed surface is dry (approx. after 1 to 4 hours depending on the climate conditions). Non-absorbent substrates (e.g. old tile coverings): Clean non-absorbent substrates such as old tile coverings or floors with adhesive residues mechanically. Apply R 755 with a lambs wool roller onto the cleaned substrate with not more than 0.100kg/m² R 766 diluted 1:1 with water.

APPLICATION

Pour 5.5 - 6.0 liters of clean water into a mixing bucket and stir in 25kg Ceresit CN 69, lump free, with the appropriate stirrer at approx. 600 rpm for 2 minutes. Apply the levelling compound with either a flooring rake or smoothing trowel to the desired layer thickness. On nonabsorbent, mineral substrates layer thickness must be a minimum of 2mm. Protect the screed layer against too rapid drying (direct sunlight etc.). The application time is approximate 20–25 minutes. All the CN 69 data given were obtained at a temperature of 23°C and 50% relative air humidity. Under other climatic conditions bear in mind that hardening may be accelerated or delayed. In case of doubt check the substrate humidity content before laying the floor covering.