CU 22

Substrate preparation

CU 22 adheres to all solid, load-bearing, clean and dry surfaces free of substances which can cause separation. Coatings, dirt deposits and separating agents must be completely removed. Screed over uneven areas and fill holes 12 hours before applying the adhesive. CU 22 can be mixed with up to 15 % fire-dried quartz sand (grain size: 0.2-0.6 mm.

Application

CU 22 is supplied in two components in either a single container or two seperate containers. Add one part by weight of hardener (component B) to 3 parts by weight of base solution (component A) and mix with an electric drill at approx. 400–800 rpm until completely free of lumps. Make sure the colour is uniform with no streaks.

Pot life and open time are strongly dependent on temperature. CU 22 is applied using the thin-bed method. In the case of heavy-duty ceramic coverings, e.g. in medicinal baths, swimming pools or battery stores, seal the surface with CE 49 Epoxi FlexSeal which provides watertightness. For obtaining watertight corners and edges use CL 52, CL 252, CL 56 and CL 57. These products are embedded into the middle of the sealing coat at all corners and near settlement joints. Fresh excess adhesive can be removed with warm water and a brush within pot life; once hardened only mechanical removal is possible. Joints can be grouted after only 24 hours. When laying ceramic slabs with a strongly raised back, CU 22 can be mixed with up to 15 % firedried quartz sand (grain size 0.2-0.6 mm, e. g. F 36 or H 33).

When using CU 22 for grouting it is necessary to follow the directions for use in the Technical Data Sheets of CE 47. Use CU 22 only at surface and air temperatures of +10°C to +40°C.