TPR R 41 resin is used in order to strengthen and impregnate extremely porous substrates, to close up cracks in composite screeds and as an injection resin for hollow screeds. TPR R 41 resin should only be used on cement substrates. It is not generally recommended for use on natural stone. Flooding the surface to saturation point helps to stabilise the substrate. After impregnation, the surface must be primed if it is to be subsequently coated. If impregnating composite screeds, watch out for cracks extending into the concrete underneath. Otherwise there is a danger of dripping into the storey below. The cracks may need to be stopped up first.
Advice on application
Once the substrate has been inspected, it normally needs to be pre-treated. The necessary quantity of hardener must be adjusted in light of the temperature of the surface. For exact details, please refer to the table “Hardener dosages”.
You must not dose less than the given quantity of hardening powder, as this will jeopardize the curing process.
You must also avoid overdosing the hardening powder, as this can likewise lead to serious curing problems.
If the pot life, within which good penetration of the substrate is guaranteed, is to be observed, appropriate batch quanti- ties should be estimated. The material must be applied as soon as the hardening powder has finished dissolving in the resin components.
TPR R 41 resin must be applied evenly without leaving puddles by means of a paint roller or brush. If rubber blades are used, the surface must always be rolled with a paint roller afterwards. Matt and heavily absorbent patches must be reworked wet in wet before hardening until the pores are closed up.
In the case of wider cracks and holes, TPR Filler QS 0.2 – 0.6 mm must be sprinkled in before the resin hardens. TPR R 41 resin must be completely cured before any further coat is applied
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