Should I Add Extra Resin to Account for Mixing Losses?

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Should I Add Extra Resin for Mixing Losses?

When planning your resin project, a precise calculation of required resin helps prevent waste and ensure a flawless finish. However, it’s easy to overlook the small but inevitable mixing losses that occur during preparation. Factoring in a little extra resin can ensure your project runs smoothly from start to finish.

Why You Should Include Extra Resin

During mixing and pouring, some resin will always remain in your mixing cups and on your stirring sticks, and a few drops may be lost to accidental drips or minor spills. These small amounts add up, particularly on larger or more complex projects. Adding an extra 5-10% on top of your calculated requirement is a sensible approach to avoid shortages.

How Much Extra Resin Should You Add?

The rule of thumb is to add approximately 5-10% extra resin to your total calculation. For example, if your project needs 2 litres, adding around 100–200ml more provides a comfortable margin. For high-volume pours such as river tables, a higher buffer helps manage the greater surface area left in large mixing containers.

Using accurate tools like a 2L Graduated Measuring Cup or digital scales ensures you dose both the main quantity and your extra allowance precisely.

Practical Tips for Accurate Measurements

Always weigh or measure the resin with calibrated scales or graduated measuring cups for consistency.
Plan your mixes with the mixing losses in mind, mixing slightly more than you expect to need for each layer or section.
Pour carefully and scrape out as much resin as possible, but assume some residue will remain, especially in thick or viscous products.

When This Matters Most

Adding extra resin is particularly important for deep pours, complex moulds, or any project where running short mid-pour could lead to visible seams or surface defects. This precaution is especially valuable with products like EpoxyTable 5-Five, designed for continuous pours up to 5cm thick.

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How Do I Calculate The Amount Of Resin Needed

Allowing for mixing losses means you’re far less likely to run out partway through your resin project. This small adjustment leads to a smoother process and more professional results—especially when following expert tips for calculating the amount of resin needed for any application.