Aside from the obvious benefit that it has ‘funk’ in the name, it appears to quickly form to a shape that gives a good seal with no maintenance. I’ve been just sticking it on with superglue.
Whether funkyfoam is the OP’s thing or not, synthetic seems to be a good way to go. From having to re-pad my old clarinet, I’ve learned more than I ever wanted to about pad mites.
Though I will say leather pads also seem to do the trick. It takes at least a couple decades for it to harden enough to need replacing, right?
Funky Foam is good stuff, I got some after Andy gave it a heads up on the NSP forum. However, there is another synthetic product called Poron, which is used to make orthotics as it is highly conformable and can be glued on with Evostik. The more it is compressed the more airtight it becomes, which makes it great for drone switch pads.
And if you think pad mites are bad, what about beetles that munch tortoiseshell? When I was an apprentice someone brought in a Hill “Fleur de Lys” gold and tortoiseshell bow for us to rehair. I thought that the frog was covered with rosin dust. It was the waste product of a tiny beetle that prefers Keratin to anything else. Frog ruined!
The customer was not happy when told the news, and my boss said that the best way of preventing future damage to other frogs was to hoover the case out, leave it open in the sun for a few days before using it… and then to keep some old toenails in it as these would be easier to digest than the harder tortoiseshell.