And I've often use a finger full of this smeared round before assembly with great success.

http://www.ebay.co.uk/itm/Holts-Gun-Gum-Fire-Gum-Exhaust-Silencer-Assembly-Repair-Paste-150g-FG1RP-FireGum-/302041124642?epid=1525162205&hash=item46530dcf22:g:LUwAAOSwdzVXrw3r

Ron

email (option): ronpier@talk21.com