ECO Wood treatment for bee equipment. 

This is how we treat our wooden wear. A good treatment takes at least two doses, but it's easy and fast.
We purchased the 5 gallon size so that we could save a little money. The mixture is 40 grams to a gallon of distilled water. I only mix 20 grams to 1/2 gallon because it goes really far. The bag can be resealed, so no problems there.