Spend a few dollars more and get a Hogue Handall or Hogue Handall Jr grip sleeve.
I started using innertubes 15 years ago after buying a hogue that slipped around and altered the circumference of my pistol grip.
Innertube works perfectly and the price is right. I'm suprised no one sells pieces as "Low Profile Polymer Tactical Adhesion Sleeves" for $5 a piece. After all, little kids buy "Sillybands", rubberbands in various shapes at 25 cents a piece.