Labelling Epoxy Resin Containers with Opening and Expiry Dates

Why Labelling Matters

Epoxy resins do not last forever, especially once the container is opened. Exposure to air and humidity can start a slow ageing process, potentially affecting the chemical performance or clarity over time. By marking the date you opened the product, you create an easy reference to judge if the resin is still suitable for your next project. Many manufacturers also provide a general shelf life, but this is usually based on unopened containers, so tracking your own usage is especially helpful.

How to Label Epoxy Resin Containers Correctly

• Use a permanent marker or a self-adhesive label to clearly write the date of opening on a visible part of the container.
• If available, note the recommended expiration or best-before date from the product label, or calculate an expiry based on the manufacturer’s shelf life (typically 6–12 months after opening).
• Keep the label legible and avoid marking over product instructions.

This habit is especially handy for products with resealable packaging, such as the “Klebfix” Two-Component Fast Epoxy Glue, where the resealable cap allows you to use only what you need and store the rest for later.

When Labelling Is Especially Important

Labelling is crucial for shared workshops, professional studios, or if you use multiple types of resin, such as those for different thicknesses or food contact. It minimises the risk of using resin past its prime and helps ensure consistent, safe results whether you’re casting with products like “Trasparente” Clear Epoxy Resin or applying surface finishes with “Icrystal” Odourless Epoxy Resin.