Nisus PenaShield Wood Preservative

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Starting at $51.15

Grouped product items
Product Name Price/Ea. Quantity
Penashield - Gallon
Penashield - Gallon
  • Buy 2 for $49.15 each and save 4%
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Pro Tips
Pro Tips & Quick Tricks
Add ALG Super Marking Dye to the PenaShield mix, so it will be easy to see where you are spraying. I would mix it in a separate container using hot water and then use a pump sprayer. Once you mix PenaShield, use it the same day and clean your sprayer.

Product Information

PenaShield Wood Preservative - Fully Pentrates Wood

PenaShield is a ready to use formulation with Disodium Octaborate Tetrahydrate (a natural borate salt), just like Boracare. Penashield is a termiticide and wood preservative in a patented penetrant.

Use a hand pump sprayer or a brush to apply Penashield to all structural wood and any other building material surfaces, which can include concrete, block walls, plumbing pipes, OSB, plywood and sheet rock.

Yield: One Gallon covers 150-250 square feet.

Penetration of Wood by Penashield over 4-6 weeks

Shows how PeanaShield can penetrate wood

PenaShield -Fungicide -Termiticide and Preservative

  • Prevents Wood Decay
  • Fully Penetrates Wood Kills & Prevents Termites, Carpenter Ants, Wood Boring Beetles and Wood Decay
  • Apply to All Untreated Bare Wood Surfaces

prevents decay and fungi on wood

As the picture shows, PenaShield prevents decay and fungi on wood and cuts.


  • PenaShield will not stain or discolor wood. - Once it is dry, you can paint or varnish wood surfaces.
  • 8.5% Disodium Octaborate Tetrahydrate (DOT).
  • No mixing required - ready to use formulation
  • Long-term protection
  • Kills and prevents wood destroying organisms, including termites, carpenter ants, wood boring beetles and decay fungi (wet and dry rot).
  • Application Instructions


  1. Does weather affect the application?
    PenaShield should not be applied when it is raining or snowing. Treated wood should be protected from rain or snow for at least 24 hours after application.
  2. Will PenaShield penetrate pressure-treated wood?
    Yes, PenaShield will penetrate pressure-treated wood.
  3. How does PenaShield stop insect and fungus pests?
    PenaShield acts as a stomach toxicant to insects and is a contact toxicant to fungi.
Packaging N/A
Product Label Product Label
Target Pest

Penashield eliminates existing infestations and provides long-term protection against wood destroying organisms such as: Wood Rot (Wet and Dry Rot), Decay Fungi ,Subterranean Termites, Drywood Termites, Powderpost Beetles, Anobiid Beetles,Old House Borers, Longhorn Beetles, and Carpenter Ants.

Active Ingredient (s) Disodium Octaborate Tetrahydrate (Na2B8O13•4H2O) ......... 8.5%
For Use : Preserves/Protects Wood and Prevents Wood Decay (Wet and Dry Rot) to Wood Structures and Materials as well as wood Components of Homes, Apartment Buildings, Cabins, Log Homes, Outbuildings (Barns, Sheds, Coops, Garages, etc.), Office Buildings, Decks, Fences, Flooring, Gazebos, Furniture, Cabinets, Shelves, Doors, Handrails, Picnic Shelters, Bath Houses, Saunas, Logs, Beams, Timber, Dimensional Lumber, Plywood, Paneling, etc.
Yield One Gallon covers 150-250 square feet, depending on the porosity of the wood.
Mixture|Application Ready to use, use a pump sprayer for ease of use.
  • Only apply PenaShield to bare wood surfaces. Remove any finishes or water repellents before applying PenaShield. Clean any dirt to make sure that the wood is free of contaminates.
  • One gallon of PenaShield will treat 150-250 square feet of wood surface (one coat). Coverage will vary depending on the surface texture and porosity of the wood. A second coat would be needed it the wood is 1 inch or thicker. Apply the second coat after the first coat has been absorbed, about 20 minutes. Apply PenaShield to the point of runoff.
  • On wood with only one or two sides available, treat at least twice to the point of runoff.
  • Repeat applications of PenaShield should be made at least 20 minutes apart. Read and follow all label instructions before use.
Shipping Restrictions AK
More Instructions

Notes for Powderpost Beetles and Penashield Application

  • Powderpost Beetles may have adults emerging from treated wood up to a year, due to their life cycles.
  • If the wood is too dry (less than 15%), depth of penetration with the Penashield may only occur to the top 1/4 inch. To solve this, spray the wood first with water to increase moisture.

Frequently Asked Questions


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