No one wants to replace logs after investing so much in their home. You shouldn't have to either. Treat your logs right from the start. When sprayed or brushed on your home, Penetreat, a borate-based wood preservative, forms a shell of protection to defend against rot, most wood-destroying insects and fungi. Penetreat is a powder that is mixed with water and then applied with a brush or sprayed on with a garden sprayer. It is also EPA-approved. Penetreat will not effect the color of wood, interfere with stain or caulk adhesion, and is completely odorless. Low cost and easy application make Penetreat the popular choice.