The Konig hardener acts as the curing catalyst for Konig's Rex Lith 2 part filler and Polyester filler. Optimum mix ratio is 10 parts filler to 1 part hardener. TIP- If mixing colour into the filler, do this first, then once you are happy with the colour add the hardener. Work time once the hardener has been added is approximately 2 to 3 minutes.

The Hardener is sold as 5 x 10g tubes.