• HOW TOs
  • Does this look familiar? Use PeneTreat®.

    Rot and beetles and termites – oh my! PeneTreat® is the inexpensive insurance every log and wood homeowner needs. When sprayed or brushed on bare wood, this borate-based log home preservative forms a protective shell to defend against rot and wood-ingesting insects. It’s easy to use and EPA-registered. PeneTreat will not affect the color of wood and is chemically compatible with all of Sashco’s stain, caulking and chinking products. It costs five times less than its glycol-based counterparts, yet does not sacrifice protection.

    PeneTreat® is the inexpensive rot and insect infestation insurance for use on:

    • Exterior log and wood surfaces
    • Interior log and wood surfaces (optional)

    Do not use:

    • On wood coated with any stain, paint or finish. PeneTreat will work only when applied to bare wood.

    PeneTreat Info Sheet

    PeneTreat vs. Glycol Borate Preservatives

    PeneTreat MSDS


    Keeping the Dream Alive – Sashco’s Complete Guide to Log and Wood Home Finishing and Maintenance

Photo Gallery


  • Borate-based log home preservative protects against wood-ingesting insects and rot
  • Powder concentrate – easy to mix, environmentally friendly, safe for people, plants and pets
  • No glycols, same protection – penetrates as deeply as glycol-based borates, but dries faster, which means less wait time before stains can be applied
  • Costs 5 times less than glycol-based borates