McMaster carr also sells empty hysol-like cartridges. This will allow you to pre mix west systems and cabosil, milled fiber etc, load it into a cartridge and then use the normal gun to reach tight places or in places where neatness counts. Scrape it out and throw it in a jar of acetone when you are done and it will be ready for the next use. You can use the nozzles, but take out the mixing spiral since the epoxy is already mixed.