ONETIME LIFETIME treatment. The ultimate in WOOD PRESERVATION. This dynamic product triggers the early stages of WOOD PETRIFICATION. SWCO Wood Preservative is a PENETRANT, not a coating. Treat your OLD OR NEW deck, dock, fence, outdoor furniture, equine center and any other wooden or bamboo construction with this dynamic Cedar Oil and Silicone solution. Petriwoods unique penetrating ability gets to the core of the wood and delivers a water, insect and decay proof treatment that will eliminate splitting, checking, cupping and expansion or contraction of the wood. Fastener rejection is eliminated. Strength is increased by fiber and cellular adhesion. STOPS DECAY AND ROT IN EXISTING STRUCTURES. SWCO Wood Preservative provides protection in below zero to 130f degree temperatures. Can be used inside or outside. Apply using a compression sprayer, air or airless paint guns, brush or roller. Simple and preferred application using a garden sprayer is recommended. Water or oil based paints and stains can effectively be applied after treatment. The composition of SWCO Wood Preservative meets FDA FOOD GRADE requirements that are considered "SAFE FOR CHILDREN AND PETS". This product may be used to encapsulate ACQ, CCA and other toxic wood treatments found in PLAYGROUND equipment. Available in 1, 5 and 55 Gallon sizes (contact us directly for 55 gallon purchase, 1 and 5 gallons can be purchased directly online through this site)