Get some skateboard tape at a local skateboard shop. They might even have some scraps they'll give you. I put some on a front strap of a 1911 & it's been on there for a couple years.
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This or go to a hardware store if there isn't a skateboard shop near you. If all you're doing is front strap, it's really the easiest way. If I were doing an entire grip, I would probably use the Talon Grips. But I like the stippling for the grips and would go with Hogue G10s if I went in another direction. So that only leaves the front strap.
The 226 is a great gun. If it fits your needs go for it. I carried a P226DAK And a Sig P229 both in .40. I hated the 229 it was too small for me. The 226 carried the same amount of rounds in a larger gun.
I'm a Sig, Glock and M&P armorer. One thing I hated about the Sigs were the damn grip screws. I love our Glocks and I'm starting to like the M&P's. There is less going on with the Glock and M&P. Did I say I hate the grip screws! They ofen fell out and were always rusting. Not an issue with the polymer guns. The fit and finish of the Sig's I've taken apart have been impressive. It was immediately clear to me why they cost more.
+1 all around. I work for a large federal agency that has 4000+ 229s in the field and authorizes the 226 (amongst other guns) as a personally owned weapon. From speaking with HQ firearms staff we have an exceptionally low failure rate (they keep very detailed logs of malfunctions and failures of our issued 229s) with our new production 229s. Personally I carry Glocks off duty (either a 19 or 43), and would on duty as well if I could, but there's an undeniable difference in the level of craftsmanship that goes into the two guns. Doesn't translate into a performance advantage for the Sig IMO, but I can certainly see why they cost more because of it.
Grip screw issues have been a problem for as long as I've been a Sig Armorer (coming up on 12 years now). I've lost count of the number of agents I've seen walking around with missing grip screws - one dude showed up for a range with rubber bands around his grips because he'd lost both screws on one side.
The screws rust like crazy, but once installed, they can be kept in place with a light application of penetrating thread locker, or even better, clear nail polish (solvent will remove that, so needs to be re-applied after a couple of cleanings, but, hey, it's cheap!)
Sig 220's used to come with star lock washers under the screws. Depending on the grips on a 226 there are 2 lengths of screws. Longer for wood and shorter for polymer grips. Long screw in poly grip may rub magazine. Short screw in wood grips may not hold due to not enough threads holding.