M_Boats: Butyl tape as bedding compound

I'm removing most of the deck hardware on my M-17, epoxy-lining the attachment holes and rebedding everything this winter. The fiberglass guy at the place I store my boat suggested that I use butyl tape as a bedding compound instead of polysulfide caulk. He said it's easier to work with and that he hasn't experienced a leak with it yet. Considering how messy polysulfide caulk can be, I'm tempted to try butyl tape -- but most importantly I want a good, long-lasting seal. Does anyone out there have experience with the stuff? Gordon M-17 #377 "Sapphire" Milwaukee