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Exterior Polymerized Tung Oil Sealer


The combination of UV guards, fungicide and Polymerized Tung Oil make this a superior exterior coating for a variety of outdoor applications.

The elasticity of the Polymerized Tung Oil allows this finish to withstand harsh seasonal cycles. This finish requires timely maintenance to protect the wood.

Sutherland Welles Exterior Polymerized Tung Oil Sealer is formulated for the tung oil to penetrate deep into the wood. We recommended it as the primer coat for finishing with our Exterior Polymerized Tung Oil Medium Luster and Marine Spar Varnish.

Looking for larger quantities?

We offer 5 Gallon Pails made to order at a 15% discount off the gallon price (Exterior Polymerized Tung Oil Sealer: $552.29). Please call us at 1-800-322-1245 to order.

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Sutherland Welles Exterior Polymerized Tung Oil finish requires timely maintenance to protect the wood. With multiple seasonal cycles the finish will eventually develop hairline fractures that allow moisture to invade, but with timely maintenance coats those fractures are filled in with new Tung Oil and help keep the finish intact. Ultraviolet light from the sun is the biggest threat as it completely weakens the finish. So how often to re-apply the Exterior Tung Oil will be a function of how much sun it gets, but at a minimum we recommend an annual application. Timely maintenance reduces the labor involved to keep a project looking great and well protected. Reapplication is easy, just clean and re-coat.

Product Stats

Solid: Polymerized Tung Oil, Ultraviolet Guards, Fungicide
Solvent: Refined Mineral Spirits
Average Finish Longevity: 1-3 years
Spot Repairable: Yes
Sheen: Low
Coverage: (per gallon)
Coat 1= 600sqf
Coat 2= 800sqf
Coat 3= 1,000sqf
Coat 4= 1,000sqf
Dry Time: 12-24 hours per coat.


  • wood species
  • applications method
  • weather conditions 55-75ºF
  • temperature change during curing process
  • humidity 65% or less

Best Used For:

Exterior Ceilings and Soffits
Exterior Decks & Porch Floors
Exterior Windows & Doors
Exterior Siding
Exterior Timber Frames
Exterior Staining
Exterior Furniture
Exterior Playsets and Tree Houses
Truck Beds

SDS Sheets

Exterior Polymerized Tung Oil – Sealer

Additional information

Weight N/A
Dimensions N/A

Quart, Gallon