Epoxy Resin & Hardener: Comparing Mixing Ratios and Key Differences

The amount of hardener you mix with resin depends on the specific epoxy system. At ResinPro, the most common ratios are 1:1 by volume, 2:1 and 4:1 by weight, and 100:55 by weight. The ratio determines the resin’s physical properties, working time, and the curing process. Using the correct ratio is essential for clarity, hardness, and long-term performance. Some resins are extremely forgiving with simple ratios for beginners, while others are engineered for professional, extra-large projects where precision is critical.

Here’s a quick comparison of our leading resin systems:

• 1:1 Mixing Ratio (by volume): Very user-friendly, great for handcraft and jewellery projects.
• 2:1 Mixing Ratio (by weight): Ideal for surfaces, art, and general coatings, balancing ease of use with enhanced performance.
• 4:1 and 100:55 Ratios (by weight): Designed for thicker applications such as deep pour and large surface projects, optimising cure and reducing risk of overheating.

Visualising Resin-Hardener Ratios In Action

Correct resin to hardener ratios make the difference between failure and flawless results. Visual demos show just how simple and effective the right ratio can be—whether you’re making jewellery or casting a large river table.

“One-2-One” – Epoxy Resin for Handcraft, 1:1 Mixing Ratio

The “One-2-One” – Epoxy Resin for Handcraft, 1:1 Mixing Ratio uses a highly intuitive equal-parts (by volume) mixing ratio. This means you simply combine equal amounts of resin and hardener, making it an excellent choice for jewellery, cabochons, coatings and decorative crafts. This non-toxic formulation offers a crystal clear, super-glossy finish and is durable against scratches and moisture. The easy 1:1 ratio minimises mistakes, ensuring reliable results for hobbyists and professionals alike.

• Resin for Jewellery

“Icrystal” – Clear Epoxy Resin – 2:1 Mixing Ratio

The “Icrystal” – Clear Epoxy Resin – Odourless Formula – Up to 1.5cm is designed for layered applications up to 1.5cm. Its easy 2:1 resin to hardener mixing ratio (by weight) ensures a straightforward process for DIY, artistic, and woodworking projects. The odourless quality and crystal clear finish make it popular for coatings and decorative pours on tables and surfaces.

• resins for tables and surfaces finishes

“EpoxyTable 5-Five” – Deep Pour Epoxy Resin for Tables and Large Projects, 100:55 Ratio

When casting tabletops, countertops, or embedding objects up to 5cm thick, “EpoxyTable 5-Five” – Deep Pour Epoxy Resin for Tables and Large Projects – Up to 5cm is a top choice. This resin employs a 100:55 ratio by weight (100 parts resin to 55 parts hardener). Strictly following this ratio is necessary for low exothermic reaction enabling thick, stable castings without overheating. The system is designed for long working time and low viscosity for bubble-free, easy pouring—ideal for creative and woodworking projects requiring reliable, scratchproof durability.

• Top Sellers

“Epoxytable 10-Ten” – Deep Pour Epoxy Resin, 4:1 Mixing Ratio

For very deep casting jobs (up to 10cm per pour), “Epoxytable 10-Ten” – Deep Pour Epoxy Resin for Tables, Up to 10cm Casting uses a strict 4:1 resin-to-hardener ratio (by weight). This formulation ensures formulated for deep pours up to 10cm thickness with low exothermic reaction preventing overheating and strong UV filters help prevent yellowing for up to 5 years. It’s engineered to perform in high-thickness, large-scale resin art and table projects.

• Resins for Tables and Surfaces Finishes

Tips for Accurate Mixing and Choosing the Right Ratio

Always measure resin and hardener by the method specified on the product label—either by volume or by weight. Mixing inaccurate proportions can cause improper curing or tacky finishes. Use clean, dry containers and mix thoroughly, scraping sides and bottom to avoid unmixed patches. When working on large projects, pour in layers if needed to avoid overheating (especially with deep pour systems). If you’re unsure, opt for the product that fits your project’s scale and layer thickness, and follow recommended ratios for flawless results every time.

Get Reliable Results by Measuring Meticulously

Accurate measuring tools and careful preparation are vital for any epoxy mixing. Explore guides and video content to see correct measurement and mixing in practice—giving you confidence to mix ratios like a pro.