Watertite CL 51
Watertite CL 51
1-component sealing film
Properties
- Flexible waterproof
- Suitable for brushing, rolling and spreading
- Crack-bridging
- For indoor use
Description
Waterproof, flexible sealing under tiles and coverings for seamless and jointless coverings in damp and wet areas, e.g. in private bathrooms with bathtubs, showers, toilets and kitchens, acc. to the information sheet “Sealing in conjunction with tile linings and coverings …” issued by the German Tile Trade Association. In the case of floor constructions with insulating layers CL 51 is applied directly onto the loaddistribution layer (screed). Also suitable for use on heated screeds.
TDS For Watertite CL 51
- Step by Step
Substrate preparation
CL 51 adheres to all dry, solid, load-bearing, dimensionally stable, clean surfaces which are ready for covering and free of substances which can cause separation (e.g. separating agents, loose particles, dust, sand, binding agents, efflorescence, dirt). Brush off powdering, dusty surfaces and prime them with CT 17 or CN 94. The top surface must be sufficiently levelled and free of penetrating cracks. CL 51 is suitable for use on mineral surfaces, e.g. plasters of mortar groups PIc, PII and PIII, concrete, fully pointed brick-work, cement screed, mastic asphalt screed, dry screed made of cementitious fiber boards and on gypsum wallboards, gypsum plasterboards, gypsum fiber boards, gypsum planks, gypsum-bound levelling compounds, aerated concrete slabs, cavity wallboards made of lightweight concrete, old ceramic coverings, sandwich-type elements made of closed- pored rigid foam with mortar coating. In the case of calciumsulphate- bound flow screeds (mechanically roughened, freed from dust and primed with CT 17 or CN 94), anhydrite screeds and gypsum-bound levelling com pounds, the moisture content must be ≤ 0.5 % by weight. With gypsum plasters (P IVa/b and P V) the moisture content must be ≤ 1.0 % by weight. Gypsum plasters must be sufficiently stable and surface load-bearing. Medium thickness of the plaster layer must be 15 mm. Plaster layers of ≤ 10mm are not permissible. The plaster surface must not be smoothed down but scraped off. Penetration of moisture into the calcium-sulphate-bound substrate, e.g. via an external wall, must not be possible. After application of the sealant, the substrate must deform only to a limited extent, i.e. surface deformations must be excluded as far as possible. Critical substrates, e.g. paint coats, must be primed with CN 94. In these cases make sure to observe the instructions given in the CN 94 Information Sheet as special requirements must be fulfilled.
Application
CL 51 is applied undiluted using a lambskin roll, brush or spreader. To produce a water-proof protective layer at least 2 coats with a total thickness of min. 0.4 to 0.5 mm are required. The second coat can be applied after only approx. 2 hours. About 4 hours after application of the second coat the surface is ready for covering, e.g. with CM 90 EasyFlex PLUS, CM 117 adhesive mortar “flexibel” or CM 15 thin-bed mortar for marble and natural stone. Settlement and edge joints must be secured with CL 52/CL 252 sealing tape, wall junctions and floor drains with CL 53/54 sealing collars for walls/floors. The sealing tape or collar is placed into the first coat and embedded with the second sealing coat. Use CL 51 only in dry conditions and at temperatures of +5°C to +40°C.
