Does wood stain have an expire date?

Yes, wood stain does have an expiration date. While it may not have a specific "use by" date, its effectiveness can diminish over time, especially if it’s not stored properly. Factors like temperature fluctuations, exposure to air, and moisture can lead to changes in consistency and performance. It's best to check for any signs of separation, thickening, or an off smell before use, and when in doubt, conduct a test on a small area.