An acetone wash and polyurethane glue (Gorilla) is the proper way to glue teak. Any other glue WILL delaminate. Had the problem with one of my subcontractors. Decided to save $100 and go with a cheaper glue (Liquid Nails drywall adhesive). It worked fine till the teak started to leach oil (about 8 months), then we had to have it all removed. The glue was still stck to the wall, but the 4" teak strips were free of any glue residue. If it were me, I would either use it as a full length shaft, or reserve it for a different project. In the long run, there are better woods suitable for footings.