This surfacer is suitable for small to medium repair work on various automotive substrates, providing a smooth and durable finish. The mixing ratio is 1:1 surfacer to thinner, with the addition of 25% hardener on volume. The components include the TH345 Rapid Surfacer Thinner and H345 Rapid Surfacer Hardener. Please note that the surfacer and thinner can be pre-mixed, but the hardener should be added just before application due to its limited pot life. Upgrade your workflow with Octoral Rapid Surfacer Grey PF345G.