TPR Systems R 51 (-25 °C) resin is a low-viscosity, transparent, solvent-free 2-component methacrylic resin with good penetrating power which cures rapidly even at low temperatures.

Application

TPR Systems R 51 (-25 °C) resin is used as an adherent primer on concrete and cement substrates at processing tempera-tures from 0 to -25 °C.

Advice on application

Once the substrate has been inspected, it normally needs to be pre-treated.

Before being applied, TPR Systems R 51 (-25 °C) resin must be chilled to 0 °C or lower. The necessary quantity of hardener is 7 percent by weight of the quantity of resin.

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 System R 51 (-25 °C) 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 absorb- ent patches must be reprimed wet in wet before hardening until the pores are closed up. Resin consumption is about 0.4 kg/m2.

TPR Systems Filler QS 0.7 – 1.2 mm can be sprinkled loosely into the fresh primer coat.

In the case of subsequent coating with TPR Systems R 68, RV 310 or RV 368 resin,TPR Systems Filler QS 0.7

– 1.2 mm (0.2 – 0.5 kg/m2) must always be sprinkled in.

TPR Systems R 51 (-25 °C) resin must be completely cured before any further coat is applied.

Special advice

If working in refrigerated rooms in which foodstuffs are stored, we recommend that you work in tents with an extraction unit so that the foodstuffs being stored cannot be contaminated with methacrylic emissions. The extracted air must

be led outside. Warm air coming in from outside will lead to condensation of air humidity, which will in turn cause poor adhesion to the substrate. For that reason the incoming air should also be chilled.

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