Penetreat by Sashco

PeneTreat by Sashco is a borate-based wood preservative that forms a shell of protection to defend against rot, most wood-destroying insects and fungi. It is easy to apply and an inexpensive way to protect your investment for years to come. PeneTreat is a powder concentrate that is mixed with water and then applied with a brush or sprayed on with a garden sprayer. It is odorless, colorless and will not interfere with the adhesion of your stain, chinking or caulking materials.