Free shipping on orders over £29,85 
Shipping Tracking! 
Google
Facebook← Back to How much hardener should be used with resin?
When starting a resin project, you might wonder if you can simply swap out hardeners from one epoxy kit to another. In reality, hardeners are not universal, and using the correct one is essential for proper curing and lasting results.
Why Hardeners Differ Across Epoxy Systems
Each epoxy resin formulation is paired with a specifically engineered hardener. The precise chemical balance between resin and hardener ensures your mix cures fully and delivers the right clarity, strength, and handling properties. Mixing hardeners between brands or product lines—even if ratios seem similar—may lead to unpredictable results, including incomplete curing, cloudy surfaces, or weak bonds.
The Importance of Mixing Ratios
It’s not just the type of hardener that varies; the mixing ratio is unique for each system. For example, the One-2-One Epoxy Resin is designed for a 1:1 ratio by volume, making measuring straightforward for jewellery and craft work. Other systems, such as Icrystal and EpoxyTable 5-Five, require 2:1 or 100:55 ratios (resin to hardener) by weight. Always check your product’s specific instructions—using the wrong ratio can harm the cure and finished quality.
Practical Guidance When Working with Epoxy
- Never mix different brands or types of hardener and resin.
- Measure accurately according to the specified method (by weight or volume).
- If unsure, consult your product’s documentation or supplier for confirmation.
This simple care ensures your creation is stable, glossy, and durable.
When This Matters Most
Selecting the correct hardener and mixing ratio is especially crucial for projects where strength and appearance are vital, such as resin jewellery, tabletops, or large decorative casts. Rushing the process or substituting components often leads to disappointment and wasted materials.
Related products
Related guides
In summary, using the hardener specifically made for your chosen epoxy resin is key to a successful result. Careful attention to these details not only protects your project but underpins everything discussed on our FAQ about resin hardener quantities.