Epoxy Resin Mixing Ratios: Weight or Volume?

Q: Mixing by Weight vs. Volume: What’s the Difference?

Most deep-pour epoxy resins —such as Epoxytable 10-Ten or EpoxyTable 5-Five—are mixed by weight. This ensures accuracy, as varying component densities can otherwise lead to incorrect ratios if measured by volume. Some resins , like One-2-One, are specifically formulated for a simple 1:1 ratio by volume. This makes preparation straightforward for handcraft or decorative projects and is ideal when precision digital scales are not available.

← Back to Epoxy resin for thick casting

Are Your Resins Mixed by Weight or Volume?

Understanding how to mix epoxy resin correctly is vital for any project, especially when working with thick casting applications. The method—whether by weight or by volume—directly affects the quality and outcome of your work.

Why Mixing Ratio Matters

Epoxy resins rely on precise chemical ratios between resin and hardener to achieve full cure and correct physical properties. Under- or over-measured components can result in tacky surfaces, weak bonds, or incomplete curing—problems heightened in deep or thick casting projects. Always refer to the manufacturer’s instructions for each specific product, as recommended by the supplier.

Mixing by Weight vs. Volume: What’s the Difference?

Most deep-pour epoxy resins—such as Epoxytable 10-Ten or EpoxyTable 5-Five—are mixed by weight. This ensures accuracy, as varying component densities can otherwise lead to incorrect ratios if measured by volume.
Some resins, like One-2-One, are specifically formulated for a simple 1:1 ratio by volume. This makes preparation straightforward for handcraft or decorative projects and is ideal when precision digital scales are not available.

Practical Mixing Guidance

Before pouring, check your chosen product’s instructions. For thick castings, use digital scales for resins mixed by weight, ensuring you accurately follow the specified ratio. For 1:1 volume resins like One-2-One, use identical measuring containers for each part. Thoroughly combine resin and hardener, scraping sides and bottom to achieve a uniform blend.

When This Matters Most

Choosing the right mixing method is crucial for large pours, river tables, or when working at greater depths. Mistakes are harder to correct in thick layers, so diligent measuring and mixing safeguard your results and investment in quality epoxy resin.

Related guides

Epoxy Resin For Thick Casting

Selecting the correct mixing technique ensures your thick casting and deep-pour resin projects are durable, clear, and reliably cured. Visit our epoxy resin for thick casting hub for more tips and detailed product advice.