is this non-toxic?

so i just upgraded one of my cresties to a MUCH bigger enclosure, and wanna stick some cork bark on the sides with some silicone and this is what i could find that wasn’t industrial grade. would this work for him or should i get something different?

so i just upgraded one of my cresties to a MUCH bigger enclosure, and wanna stick some cork bark on the sides with some silicone and this is what i could find that wasn’t industrial grade. would this work for him or should i get something different?