98 Repair & Renovation Guide DUROSTICK has a special and complete product line related to building paints for exterior building facades. Depending on the nature and location of the surface, the choice of the paint is equally important as the preparation of the substrates before painting. Substrate preparation Concrete and marble-based plaster surfaces have to be dry, free from loose materials and oils, and must have cured for at least 30 days after their construction. For new concrete surfaces, make sure to remove any formwork oils, if any, using the biodegradable oil remover BIOCLEAN INDUSTRIAL. Subsequently, apply 2 coats of 1mm each one using the corrosion inhibitor RUST FREE POWER of DUROSTICK, on any exposed rebars, if any. Once dry, cover the rebars with the repair mortar DUROFIX or the thixotropic and fiber-reinforced rapid set repair mortar DS-245 POWER MORTAR RAPID of DUROSTICK. Finally, prime with SOLVENT-BASED PRIMER of DUROSTICK, diluted with THINNER 101 or white spirit. For new marble-based plaster surfaces, sand them down using No60 sandpaper and prime using 100% ACRYLIC PRIMER, AQUAFIX micromolar stabilizer or SOLVENT-BASED PRIMER of DUROSTICK. Surfaces infested with black or green mold or even active fungi, necessarily have to be cleaned using DUROSTICK D-95 CLEANER, then rinse thoroughly, dry and prime using SOLVENT-BASED PRIMER or the micromolar stabilizer AQUAFIX of DUROSTICK. For skimming or filling, use STUCOFIX paste, STUCOFIXP, POWDER COAT, GRANULAR ULTRA or GRANULAR of DUROSTICK, or any combination of the above, depending on the surface imperfections and smoothness of the finish necessary. Follow by priming the surfaces. Preparation of exterior building surfaces The exterior surfaces of buildings are exposed to air pollutants, temperature variations and weather conditions in general. PAINT Already painted, sound surfaces require just two coats of the DUROSTICK paint of your choice. Surfaces soiled with soot and air pollution, are cleaned with the biodegradable cleaner BIOCLEAN (for nicotine and soot) or they are primed with METAL PRIMER of DUROSTICK. For peeling surfaces, remove all loose materials and prime using 100% ACRYLIC PRIMER, or the micromolar stabilizer AQUAFIX of DUROSTICK. Marble-based plaster surfaces with severe cracks, are sealed with the fast setting white repair plaster D-32. Concrete surfaces are sealed with the repair mortar D-55 of DUROSTICK and primed afterwards as described before. Especially on surfaces with intense expansions and contractions, the application of the water repellent, flexible plaster, HYDROSTOP PLASTER ELASTIC or the innovative and flexible, multipurpose, repairing cementitious mortar, MEGAFIX of DUROSTICK, is highly recommended. Filling joints around doors and window casings, by using the paintable ACRYLIC CAULK for interior use, the elastomeric sealant DUROFLEX-PU for exterior use, or the versatile sealant and adhesive for interior/exterior use, DS POLYMER of DUROSTICK, available in 32 colors.
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