Have you ever found yourself wondering why our glue has an expiration date? If so, we're about to let you know why.

Before the 1970's, the primary ingredient in our protein glues was extracted collagen from hides of bovine and porcine. 

If you're reading this post, chances are you are using, or plan to use, protein glue (animal glue). If that's the case, you're in the right spot. 

Have you ever been part way through production and completely run out of protein glue (animal glue, hide glue)? Or maybe you've ordered way glue more than you needed and you had to dispose it because it expired?