AVAILABLE from Lee Valley
Polyethylene Glycol (PEG)
PEG is used to fully stabilize green wood. Used soon after the wood has been cut, it enters end grain rapidly and edge grain more slowly; best results are seen with end-grain cuts.
PEG remains as a waxy coating inside cell walls, preventing them from shrinking, expanding, or collapsing. Two types are available.
PEG 1000 has a molecular weight of 1000. At room temperature the solid block has a firm, waxy consistency. It melts around 98°F (37°C). PEG 1450 has a higher molecular weight and its flaked form is easier to dissolve. It takes a bit longer than PEG 1000 to fully permeate and stabilize the wood cells, but it has a higher melting temperature (110°F or 43°C) and is less subject to bleeding at high temperatures or high humidity. Both types use the same mixture ratios (makes one gallon at 50% solution).
To finish wood treated with PEG let the object fully dry; complete any sanding, carving and routing; apply a penetrating oil finish or, for a glossy finish, an epoxy polymer.