The best replacement for gaskets is spiral wound.

The best alternatives to gaskets are rated as following:
★★★★★  spiral wound
★★★★  cometic
★★★  rubber gaskets
★★  auto gaskets
★★  automotive gaskets
★  felpro
★  stock sti head gaskets
★  felpro gaskets

Your alternative for gaskets is not listed? Suggest!
Speaking about gaskets, one probably shouldn't forget about headers.

Other search terms related to gaskets and their ratings are:
★★★★★ headers
★★★ rtv
You have in mind a companion for gaskets and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of gaskets in all years. Click on graph for more.
gaskets
spiral wound
cometic