No thinning is necessary. However, in cooler temperatures and to increase penetration with reduced viscosity, it can be thinned with acetone. Make small batches, just a few ounces at a time. Make sure all surfaces being repaired get coated with at least one heavy coat. Otherwise, when components are hot, they can react and harden in 5 minutes or less - before you have a chance to use them.
Heat accelerates the curing process.
Warm the components to room temperature or keep them in an inside pocket of your coat to accelerate cure times. It also reinforces, waterproofs and hardens wood. Avoid skin contact. Skin sensitization may result from prolonged and repeated contact. If use causes soreness, redness, blistering, or other symptoms of irritation, stop use and see a physician immediately.