My 42 year old Cheoy Lee yawl has teak decking over plywood subdecking. The teak is embedded in thiokol and srewed down. The plywood is actually in good shape (recently resurveyed by a wooden boat surveyor who surveyed it pre-purchase in 1997) but there a still the usual leaks. In addition to replacing bad bungs and seams, would there be any additional advantage to using a wood sealer product like Thompson's?
Or is this just wishful thinking