Thompson's WaterSeal Penetrating Timber Oil Review (2026)
By The DIYPicks Team · Updated July 2026
DIYPicks is reader-supported. As an Amazon Associate and affiliate of home-improvement retailers, we may earn a commission when you buy through links on our site — at no extra cost to you. This never affects our recommendations.
- Budget minded fence refresh
- New cedar and redwood fences
- Penetrating water repellency with light tint
- Widely stocked at big box stores
A budget penetrating oil for fences that soaks into bare cedar and redwood, repels water, and adds light grain-enhancing tint, and it is stocked at nearly every big-box store for easy touch-ups. The catch is durability: its thin, near-transparent film carries little pigment, so graying protection is modest and most fences need a fresh coat every 1-2 years. Oil cleanup and a dry 48-hour window are the usual oil-stain trade-offs.
Pros
- Deep-penetrating triple-oil blend nourishes bare cedar and redwood and repels water well for the price
- Cheap and stocked at nearly every big-box store, so touch-ups are easy to buy
- Light tint enhances grain and adds some mildew and UV resistance without hiding the wood
Cons
- Thin, near-transparent film wears fast and typically needs reapplying every 1-2 years
- Limited pigment means weaker graying protection than semi-transparent or solid fence stains
- Oil base requires mineral-spirit cleanup and a dry 48-hour weather window after coating
Specifications
| opacity | Transparent to semi-transparent |
|---|---|
| base | Oil-based penetrating (triple oil blend) |
| coats | 1 coat |
| coverage | Up to 250 sq ft per gallon on smooth wood; less on rough fence boards |
| dryTime | About 2 hours to touch; keep off rain for 48 hours |
| cleanup | Mineral spirits |
| reapply | Roughly every 1-2 years |
| note | Resists mildew and UV; sold at Home Depot, Lowe's, Walmart and Ace |