Dry Suit Gasket replacement

Who do you all use for gasket replacement on a dry suit?  Also are the SI tech wrist seals worth the investment?  Are you all using silicone or latex for your seals.  Thanks

I replace my own neck gaskets.  It's easy and quick to do, which is good, because my neck gaskets only tend to last about two years. Kokatat has instructions for replacing neck gaskets at https://assets.ctfassets.net/pe7xw34fs2z8/3cLs216SqZ4LgvuI6j1CZW/fdbca98e00bd3b03362d3f39274a9c2d/kokatat-neck_gasket_repair_with_kokatats_neck_gasket_replacement_kit-INSERT-web.pdf.  Kokatat charges $86 for its neck gasket replacement tool and the spring clamps which clamp it in place, see https://kokatat.com/neck-replacement-tool-acctoolnec, but I use a reproduction of that tool which I cut out of 1/4" masonite.  The tool is just a 10" diameter disc with a couple of holes drilled in it to help you maneuver it around as you're positioning it, and a 1.5" wide ring with a 10" outside diameter. Instead of using spring clamps to apply pressure on the gasket when I glue it, I use a bowl which has a rim the same diameter as the center of the gasket tool's ring, with a weight on top of it, because that applies more even pressure to the gasket than spring clamps.

A replacement neck gasket is more likely to be comfortable if you buy one which is the right size for your neck.  OS Systems sells neck gaskets in seven different sizes, see http://ossystems.com/?page_id=802, as does Immersion Research, see https://immersionresearch.com/products/latex-neck-gasket. NRS's neck gaskets come in four sizes, see https://www.nrs.com/product/2284/nrs-latex-neck-gasket, and Bare's neck gaskets come in three sizes, see https://www.amazon.com/Bare-Latex-Drysuit-Neck-Seal/dp/B07BNCBZHN, but Kokatat's neck gaskets only come in sizes large and small, see https://kokatat.com/latex-neck-gasket-zcufnek.  NRS neck gaskets come with a tacky adhesive coating on the area you would put glue on when gluing a neck gasket on the outside of a dry suit; I find this coating to be a hassle regardless of whether I'm gluing the neck gasket on the inside or the outside of the dry suit.

Neck gaskets have ridges on the inside of the neck area to provide a better seal against your skin.  If your drysuit has its gasket glued on the outside of the fabric of the drysuit, the gasket will be right-side-out when you glue it, and the ridges should be on the inside.  If your drysuit has its gasket glued on the inside of the fabric of the drysuit, the gasket will be inside-out when you glue it, and the ridges should be on the outside.

Glue doesn't stick to silicone, so silicone neck gaskets can only be used on drysuits which have a ring device installed in their neck to clamp in the silicone gasket.  For an interesting discussion of the different materials which can be used to make neck gaskets and latex-free alternatives, see https://immersionresearch.com/pages/latex-free-gaskets.

Also are the SI tech wrist seals worth the investment?

I have SI Tech quick-release dry glove rings on the dry suit which I use for snorkeling and speargunning for pike, so I can use hardware store rubber gloves as dry gloves.  Diving dry gloves are real expensive, and pike and many other kinds of fish are way too hard on dry gloves for it to be economical to use diving dry gloves. If you want to wear dry gloves when kayak fishing to keep your hands warm, but want to be able to pop off the gloves when you need to do something which requires manual dexterity, the rings are a good way to go. But only if you have a pedal kayak.  If you have a paddle kayak, the rings would constantly bang on the hull of the kayak, which would make you crazy.  The SI Tech Rings can be installed on the wrist gaskets of a dry suit, so you don't need to do expensive and permanent modifications to your dry suit to install the ring system. Over time and lots of use, both of the knurled rubber grips which fit over the rotating part of the rings fell off and got lost, so I put some black duct tape on the ring to provide better friction than the bare plastic.

However, there are way cheaper and more convenient ways to keep your hands warm while kayak fishing than buying a diving dry glove system.  In cold weather, I wear 8 mil disposable nitrile gloves with polypro glove liners inside them.  See https://www.northwestkayakanglers.com/index.php?topic=21815.msg227951#msg227951.