Handyflex is a general-purpose, one-pack acrylic crack repair filler, for interior and exterior use. It forms a water-resistant joint and a dust and damp-proof seal in situations too demanding for normal fillers. A general purpose, flexible joint treatment for cement fibre board and paintable crack repair filler for interior and exterior use. It is a quick drying, waterproof, weather resistant, highly adhesive, easy to apply compound with permanent flexibility that can be painted after 24 hours. It bonds extremely well to cementitious materials, gypsum, building boards, plaster, wood and all common building surfaces.