Penofin Pro-Tech Brightener restore the natural pH balance of your wood. This is your second step after the use of Pro-Tech Stripper or Cleaner. This will neutralize the wood prior to application of a Penofin Wood Stain. Concentrate: This container will make 8 Liquid Gallons of Brightener. Each Liquid Gallon will Brighten 200 sq. feet. Brightens the wood Biodegradable Restores neutral pH balance of the wood Removes Mill Glaze