The recommended shelf life on PVA glue is generally a way for the company to cover its butt. One year is simply the length of time they will guarantee the quality level. But most glues can go for two years or more if stored consistently at room temp. And fortunately, the glue will show signs of problems when it is bad.

Can you use expired glue?

You’ll notice, especially with your natural glues (protein/gelatin based) and liquid water-based glues, that after they have hit their expiration date they may become moldy and unusable. … Glue that is past the expiration date will not provide the appropriate bonding properties, and you will likely have to discard it.

How do you revive PVA glue?

According to Titebond you should first try repeatedly tapping the container on a hard surface to loosen it up. Then you can thin it with water up to 5% of the glue’s weight or volume. Regarding strength, they say: Adding more than 5% water to our glues will decrease the bond strength.