I think I would hesitate to add that compound between a head shell and cartridge. In fact, I went down such a rabbit hole with Shure and AT cartridges several years ago and any gains I found were questionable at best. I started by experimenting with wood head shells and potting cartridges and the only thing gained there, really, was an easier mounting wherein I could screw directly into the wood cartridge body. I thought the sound was better, but was it really?
Then I broke one of the little aluminum mounting 'ears' off of a Shure m97xe. Those little guys are brittle! I decided to mount it into a pretty paradox pulse universal aluminum cartridge body. I ended up with a cartridge that is high compliance but weighs a portly 11.5 grams with stylus. I can barely mount it on a Rega arm with standard counterweight and I can't get past the compliance bit when I play it at all of 1.25 gram on an aftermarket HE stylus with brush down. So, in the end, all of that and a cartridge I almost never use anymore. In hindsight I should have used less epoxy, or even just a couple of dabs of something like super glue, to mount the cart in the body. That might have made it a much more reasonable weight. Stupid me, but the point is that the DIY work can lead to such outcomes unless great care is taken.
The manufacturers, especially Shure, tested these cartridges with the little cheap plastic bodies they sold them in, so I generally accept that they will perform as expected even though the little plastic mounts can sometimes seem crappy. As an aside, I also found that when I sold a couple of Shure sc35c cartridges that had been rebodied into paradox pulse bodies, there was limited interest. Hobbyists want genuine stock items, so there's that.
My take away has been that I will reserve remounting of cartridges for ones that I really love but where the mount has fallen apart, and then only with caution so as not to change the essential character of the thing. Adding the coupling putty you could create a mess, or who knows what? If the sound is good I'd probably focus my energy on something else.