Application of reactive resin products
Epoxy and polyurethane resins are supplied in two matched components and are brought to reaction by intensive mixing. Resin base and hardener react chemically by cross-linking to form mechanically and chemically highly resistant end products. These so-called liquid resins are used as primers, levelling coatings or screed binders. The mixing and processing of these very high-quality products requires special care and expertise.
Simple & safe to the goal
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Safety first
Reactive resins are usually subject to labelling and therefore make special demands on work safety. For the processing of epoxy resins, the national Employer's Liability Insurance Associations stipulates that protective goggles, long-sleeved clothing and special gloves must be worn, and that neither eating nor smoking should be allowed during processing.
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Proper storage
Reactive resins should be stored in a temperature range of > +15 °C to +25 °C. Cold resin components behave like honey and can only be mixed with great difficulty or insufficiently. Inversely, if the components are stored in a very warm environment (inside a vehicle in the sun), an immediate reaction occurs during mixing. The processing time is thus extremely shortened.
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Application
1. Reactive resins generate heat during the setting process. This can cause the mixed material in the mixing vessel to heat up very quickly. Therefore, the reaction resin should be poured out quickly after mixing and distributed (as coating) with the rake weber Großflächenrakel + triangular notched blade weber Zahnleiste or a rubber squeegee (as primer).
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3. Levelling (self-spreading) coatings are applied with the rake weber Großflächenrakel + notched blade weber Zahnleiste no. 1 (notch 2.5 mm) in the intended layer thickness and de-aerated with a spike roller in crosswise motions for approx. 5 - 10 minutes. On inclined or vertical surfaces, the mixture can be adjusted to a non-sag consistency by adding a thixotropic agent (weber.floor 4917) and applied with a trowel.
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6. For improving the cleanability, apply a top sealer, for ex. the epoxy resin coating weber.tec 796. For this purpose, the material (unfilled - without silica sand) is poured onto the floor, spread with a rubber squeegee with a soft lip and finished with a shorthair lambskin roller for providing a thin layer.
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Application on inclined surfaces
1. When working on inclined or vertical surfaces, the otherwise highly flowable reactive resin coatings can be adjusted to a trowel-grade consistency by adding a thixotropic agent (weber.floor 4917). Depending on the desired consistency and application, mix the pre-said product at a rate of 2% and 8 % by weight into the already mixed binder.
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2. The thixotropic adjusted material can now be applied in thin layers with a roller or in thick layers with a flat trowel. In case of multiple roller application, it is recommended to make the intermediate layers non-skid by scattering quartz sand (0.1 - 0.5 mm) so that the roller does not slip during application. This also increases the adhesion of the intermediate coat and ensures a uniform application thickness.
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Connection floor – wall
3. The transition from the horizontal to the vertical surface is formed by installing a triangular wedge or a bottle-form groove made of epoxy resin mortar. The leg length should be 30 - 50 mm. The mixing ratio of the epoxy resin mortar is 1 : 7 parts by weight of the epoxy resin primer weber.tec 794 and silica sand in the appropriate grading curve.