What's the difference between consumer and industrial grade strain gauge adhesive?
A quick search turned up phidgits own guide to using strain gauges.

https://www.phidgets.com/docs/Strain_Gauge_Primer

They recommend epoxy as a starting point. I was going to recommend JB weld, as I've had good luck with it, it's not conductive.

On a more general note, you can call adhesive manufacturers like Loctite, and they'll often be happy to recommend one of their adhesives. They have HUGE catalogs of different formulations, so it's likely they'll be able find something that will work for you. It'll probably come in a tiny tube and cost 15 bucks, but it won't be omega expensive. Plus they have bulk options if you need that.