In ground structures

After reading your newsletter we remembered using your wood sealant on a loading dock built into a side hill. In 1996 we built this dock for loading hay. We started by digging into a hillside that would let us back our flat bed truck in and then use our New Holland bale stacker to unload onto the flat bed. We used Seal-It on the rough spruce that was put in as cribbing. There is no other protection from the weather, yet the spruce shows no rot. We would not have expected the wood to last this long especially in contact with soil.