I have a nice new technium rod and wish to seal the cork handles.In the past I used a product called U-40 cork sealer with good results. I cant seem to be able to find it anywhere.What do you guys use (if anything) to seal cork handles. Linseed oil, flat finish varathane, diluted white glue, or other? Thanks in advance. And if you know where I can get U-40, please Do tell. Brian.