

🛡️ Protect your wood, preserve your peace of mind — the smart shield every space deserves!
PenaShield is a ready-to-use, borate-based wood preservative that penetrates deeply to protect against termites, carpenter ants, wood-boring beetles, and decay fungi. Suitable for indoor and outdoor use, it dries clear without discoloration, allowing treated wood to be painted or stained naturally. This eco-friendly formula emits no harmful VOCs, providing long-lasting, safe protection for decks, attics, and woodworking projects.



















| Best Sellers Rank | #94,590 in Health & Household ( See Top 100 in Health & Household ) #130 in Wood Conditioners, Waxes & Oils |
| Brand | Nisus |
| Color | Clear |
| Customer Reviews | 4.6 out of 5 stars 378 Reviews |
| Material | Wood |
| Model Name | PenaShield 128oz |
| Size | 1 Gallon |
| Surface Recommendation | Wood |
B**.
Impressed upon application
Very easy to apply using pump garden sprayer. Covered a large area and soap and water cleanup! I am optimistic that this product is a solution to preventative termite and carpenter ant issues.
S**E
Great prod
Great prod
R**B
Time will tell how well it works!
I use this one on my back deck and it’s pretty much the same as only time I’ll be able to tell how well it works. Easy to apply. Doesn’t smell bad at all.
A**M
Stopped the damage!
Used this to save the side of an outbuilding I have and it worked! I had to rebuild part of a ground level wall but was unable to remove every single last piece of the wall. Soaked it in the Penashield and months later it has done the job and stabilized the wall. In spring I will be doing the same repair to the other side of the building and the first thing I'll do is order Penashield.
M**B
Perfect
Works very well
R**M
Nisus 30201 PenaShield Clear Wood Preservative seems like a quality product and easy to apply.
Purchased the Nisus 30201 PenaShield Clear Wood preservative to prevent future carpenter ants on pressure treated deck wood joists. Only applied recently but had good reviews and seems like a quality product. I would recommend using this.
R**S
High quality product, seems to be difference depending on where it is manufactured.
I have bought this product 3 times. It seems like a good product. My issue is they seem to have different manufactors making the product one in India and one here in the US. The first two times I bought the product I recieved the one that looked as pictured here, seems to be the one made in the US. The last time I bought it the product looked different and had a very strong smell to it and a yellowish color. It was applied outside and the odor remained over 24 hours after application. This did not happen with the first two times I ordered this. If it wasn't for this I would rate it 4 stars.
R**H
bought to keep wood safe from carpenter ants
After an infestation of carpenter ants left major damage on my 150 year old house, I used this on areas inside soffits with bare wood to prevent a repeat performance. This and an external ant deterrent helps me sleep at night.
Trustpilot
3 weeks ago
3 days ago