Yes, Wood Juice will absorb all the way through the wood. The time it takes depends upon the type and size of the wood. Keep in mind that most of the absorption is through the end grain. When using the brushing method, keep applying until the wood will no longer absorb Wood Juice. In between brushing applications, the wood should be wrapped in plastic in order to help absorption and prevent premature evaporation. Remove the plastic during drying – this will allow the wood to breathe and prevent mold growth.