Pentacryl will penetrate the wood in one day where it will take PEG 6 months to do so. PEG needs to be soaked with heat elements to keep it hot while applying. PEG acts as a humectant and encapsulates the water molecules by drawing in moisture from the air and makes the wood sticky and hard to apply a finish. Wood is heavier when treated with PEG. Pentacryl eliminates these issues associated with the use of PEG.