TWP 1500 Series Flat/Matte Cedartone Semi-Transparent Oil-Based Wood Preservative 5 galTWP 1500 Series is an EPA registered wood preservative designed to protect and extend the life of exterior, above ground wood surfaces. Its advanced formula helps prevent structural damage and wood decay while enhancing the natural beauty of both new and previously treated wood. Ideal for applications such as fencing, decking, siding, log homes, and roofing, TWP 1500 penetrates deeply to resist water absorption helping to reduce warping, cracking, and