RENOBUD R 102

Concrete substrate: The surface must be properly prepared before applying NEXLER RENOBUD R 102. The concrete substrate must be made of concrete of min. C20/25 grade, with a strength of at least 1,5 MPa measured by the pull-off method. The substrate must be clean and free of oil, grease, cement laitance and other substances that impair adhesion. Clean the substrate mechanically, remove dust and any loose layers. Concrete substrates that are significantly deteriorated, soiled or chemically or biologically corroded should be subjected to special treatments such as sandblasting, shot-blasting, milling, fungi removal. The substrate must be properly mechanically roughened before the product is applied.
NEXLER RENOBUD R 102 should be used on a matt-damp substrate. The surface of the concrete should be uniformly dark and matt, without light-coloured spots or water stagnation. Immediately before applying the product, wet the substrate with water to a matt-damp state. Porous and dry substrates should be saturated with water a minimum of 1 day before application. 

Rebars: Prior to the application of NEXLER RENOBUD R 102, the rebars should be cleaned of any rust film and other elements that can result in separation or accelerate corrosion. The exposed surfaces of the reinforcement elements should be thoroughly cleaned, for example by sandblasting, removing rust and any other dirt, up to a cleanliness grade of SA 2. In the case of bars with a fully or largely exposed surface, the concrete around them should be chiselled in such a way that after reprofiling the lagging made of NEXLER RENOBUD R 103 mortar has a minimum thickness of 1,5 cm.

Check the production date on the packaging before use. The product should not be incorporated beyond its shelf life. The product should not be objectionable (e.g. contain lumps, clumps, mechanical impurities) after opening. The mortar should be dry after opening the packaging, with no visible signs of moisture. Do not use a product that bears signs of freezing. After mixing with water, the mortar should be homogeneous and free of lumps and clumps resulting from under-mixing. Properly mixed, the product spreads easily over the surface and does not run off.

Before use, NEXLER RENOBUD R 102 should be poured into a vessel with a measured quantity of clean water and mixed with a slow speed mixer until a homogeneous consistency is obtained. If partial use is assumed, the product should be prepared maintaining the weight ratio of the components. Use 1 kg of dry mix per 0,32 - 0,35 l of water. After the maturing time of 5 minutes, mix the material again. The mixed material, ready for processing, should be used within 2 hours. The thickened material cannot be stirred and processed again.

Check that the product is evenly applied and covers the entire surface. Check the progress of drying before further work is carried out. The bonding layer must not be completely dry before the next mortar is applied. A well-applied layer should be permanently bonded to the substrate and should not detach. The bonding layer should not be too smooth but should have a suitable, slightly rough texture that ensures adequate adhesion of subsequent layers.

Work should begin with making a protective layer for reinforcement. Apply the prepared NEXLER RENOBUD R 102 mortar evenly with a brush to the cleaned rebars. After securing the reinforcement, NEXLER RENOBUD R 102 should be applied evenly to the substrate by firmly rubbing it in with a paint brush or broom brush. When applying the bonding layer, the mortar should be applied to an area slightly larger than the repair area so that the next system layer of NEXLER RENOBUD R 103 can be applied according to the ‘wet on wet’ principle. If the bonding layer dries out before the next mortar is applied, it must be applied again.

Before use, please read the application details in the product's Technical Data Sheet.