Our special Knot Filler was already made in 1991, especially for the window industry. Today we have many satisfied customers in all sectors of the wood industry. The innovative Knot Filler is one component and is none dangerous for the user and end consumer. Knotfiller is a punctual repair, for knots and cracks, which means very little waste. And because its a one component product, you don't have to mix any troubled two part fillers. in only a matter of seconds the Knot Filler is dry and the wood component can be worked on straight after. Knot Filler comes in 14 colors and can be used for all wood sorts. Is very good for outdoor and indoor use. All surface treatments possible.