Tung Oil Storage — Drying Oil Tank Selection for Spar Varnish, Gunstock, Heritage Wood-Finish

Storing Tung Oil? Start Here

Tung oil, also known as China wood oil, is a popular choice for high-quality wood finishes, marine spar varnishes, and waterproofing applications. It's prized for its ability to create a tough, water-resistant film, making it ideal for outdoor furniture, gunstocks, and even food-contact items like cutting boards. However, it's important to handle tung oil carefully due to its tendency to spontaneously combust and its fast oxidation rate.

Can you store it in a poly tank?

Yes, you can store tung oil in a polyethylene (HDPE or XLPE) tank at ambient temperatures. However, if you plan to heat the oil for processes like making stand-oil, polyethylene is not suitable. For high-temperature applications, stainless steel tanks are recommended.

Watch out for spontaneous combustion

One of the key issues with storing tung oil is its high risk of spontaneous combustion, especially when rags or other materials soaked in the oil are left in piles. Always ensure proper disposal and storage practices to prevent fire hazards.

The safety that actually matters

• Store in a cool, dry place away from heat sources.
• Use stainless steel tanks for heated applications.
• Dispose of oil-soaked materials properly to prevent fires.

Common questions

Can tung oil be used on food-contact surfaces?

Yes, once cured, tung oil is FDA-approved for use on food-contact wood surfaces like cutting boards.

What type of gasket should I use?

For ambient storage, EPDM gaskets are suitable. For heated applications, Viton or PTFE gaskets are recommended.

Does tung oil darken over time?

Yes, tung oil naturally darkens to an amber color over time, even under optimal storage conditions.