Review on 🖋️ Nisus 30201 PenShield: Ultimate 128oz Borate Wood Preservative for Long-lasting Protection and Clarity by Jorge Gutierrez

Read and follow precautions. This is good protection for treated wood if used prior to installation/construction. It is less effective when sprayed on after assembly as it does not penetrate the joint seams as it should. I don't take my deck apart to apply it, so as much as possible sprays from below. I had to replace a few floor joists due to moisture rot. Too bad treated wood needs a little extra work to make it last as long as it should. Use this before building or replacing your next deck and maybe it will last longer than my 10 years.