I use same plastic thats used on Rapala lures & many other finnish& other European commercial &hobby lures ,works as a charm for me .You can dip ,spray &brush it on .Do a search on Propionate here in the hardbait forum .I also use lips in same material so only glue i need is the sealer ,dip lip in sealer put in place & its ready to tune,testswim in 10 minutes.
I usually buy in bulk so let me know if you need some both lips & sealer
Sealer comes in pelletsform that you disolve in Thinner or Acetone