Usage: Fills hairline cracks and gaps between plastic parts. The product can be sanded when fully dry using a fine grade of sandpaper and painted. Substrate: Plastic model kits. Application: Directly onto substrate without excessive application of product. If gaps are deep two thin coats are preferable to one thick coat. Drying Time: Surface dry in 1-2 hours. Fully dry in 24 hours. How to Clean: Wipe away using a damp cloth. Product is permanent once dry.