Upon inspection of the office building at Woonpalet Zeewolde, it was found that the powder-coated aluminum window frames were seriously contaminated and powdered. On the advice of MAVRO International, NVT Onderhoudsgroep BV provided the frames with NITOCRYL, a transparent, color and gloss-restoring coating. This easy to apply coating offers protection for 4-6 years and is reversible. They have also cleaned and impregnated the masonry with MAVROSEAL. A great result!