What is the compressed thickness of your current gasket and what is/was your squish measurement?
If the gasket is off, squish it with a pair of calipers.
? ? ? ? Post up these measurements and I'll try and steer you in the right direction as the AFM's compress under load and cometic has no idea how this works much less what you'll actually need.
I've used the 1184, like I said get the 1211http://www.amazon.com/Three-Bond-Silicone-Liquid-1211AT100/dp/B0022ZZ26S