The following is taken from the Titebond web site:
I replaced a bottle of Titebond III glue a few days ago. It was at least three years old, and stored above freezing. (I had a bottle of Titebond freeze about ten years ago, and that was the end of that bottle......stiffened.)
The Titebond III glue had noticeably thickened some, but was still fluid and bonded well. This winter, I noticed that it had become lumpy, and it was time to replace it. It was still bonding well, but I couldn't take the chance of one of my waste blocks coming off while turning.
It might be best to replace the bottle every year, or maybe two......what does everyone else do?
ooc
What is the shelf life of Titebond Wood Glues?
Our literature states the shelf life of all of our glues as one year. Titebond Liquid Hide Glue includes an expiration date on the bottle, because it can progressively lose its ability to dry hard, and this change is not visually obvious. Titebond Polyurethane Glue has a one-year shelf life in an unopened container, but is useable as long as the glue remains fluid. Polyurethanes, however, are designed to react when exposed to moisture. Sometimes, they begin to cure, and solidify, after the bottle has been opened. Most of our yellow and white glues, including Titebond Original and Titebond II, remain usable beyond two years. Should Titebond Original become thick and stringy, or Titebond II turn into an orange-colored gel, these changes signify that the glue is no longer usable. The minimum shelf life of Titebond III is stated as one year. When stored appropriately at room temperature, Titebond III is expected to last beyond its stated shelf life. If thickened, shake vigorously by firmly tapping bottle on a hard surface until product is restored to original form.
I replaced a bottle of Titebond III glue a few days ago. It was at least three years old, and stored above freezing. (I had a bottle of Titebond freeze about ten years ago, and that was the end of that bottle......stiffened.)
The Titebond III glue had noticeably thickened some, but was still fluid and bonded well. This winter, I noticed that it had become lumpy, and it was time to replace it. It was still bonding well, but I couldn't take the chance of one of my waste blocks coming off while turning.
It might be best to replace the bottle every year, or maybe two......what does everyone else do?
ooc