Redecker Brush Manufacturer since 1935 Thermo brush, light. Thermo brushes with cotton strap attached with brass nails. Thermo Wood: Wood, processed by means of a delicate heat treatment, has a higher density and is impervious to water, thus completely impregnated. And that without coating! At medium temperatures of 180 ° -220 ° C, the wood is baked. It changes the wooden structure and it's getting that pretty dark brown color. With its color and properties is thus similar to some tropical woods. The wood is harder and no longer absorbs water. The thermoplastic timber shows minimal work, swelling or warping.