89259 ⎘
After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone; Coating or impregnating e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements, with organic materials; Macromolecular compounds; Condensation polymers of aldehydes or ketones Urea-formaldehyde condensation products