Going through a spate of ripping my Kubi cuffs on my drysuit. Dug out the replacement latex set to discover they'd perished -- more like BluTac than latex. I've always preferred Silicone seals anyway as they've more stretch and don't perish. But they do rip! So replaced my torn cuff with a Waterproof silicone cuff, all fine. Two dives later it ripped in half. Thankfully one more spare left. Been researching options. Seems there's three options: Waterproof 'standard' thickness which are thin and the one I've just torn - about £24/pair Waterproof 'HD' thickness which apparently are thicker - about £33/pair Si Tech seals which have worked fine for years on my drysuit. These are thicker than the Waterproof standard ones, but aren't easy to source online. So just ordered a pair from my LDS. About £24/pair (sold singly) Which seals do you use and any recommendations / preferences?