How to Use Epoxy Resin for Crafts? | Strong, Clear Results

A glossy resin coaster or pendant starts with two bottles and a stopwatch. The way to use epoxy resin for crafts comes down to accurate measuring, thorough mixing, and patient curing — skip any one and the piece stays sticky or cloudy rather than glass-hard. Get these three things right and even a first-timer can produce pieces that look shop-bought. Here’s the exact process that works for coasters, keychains, trays, and jewelry.

Using Epoxy Resin For Crafts: The Core Mixing Rules

Most craft epoxy kits use a 1:1 volume ratio, not weight. That means equal volumes of resin and hardener, measured in identical graduated cups. Pour each to the same line and check the levels side by side before combining. Guessing or eyeballing is the fastest route to a ruined pour — an off-ratio mix either stays tacky forever or never hardens at all. Work in a well-ventilated area and wear disposable gloves plus a respirator; epoxy fumes can irritate the lungs with repeated exposure.

Mix slowly for a full 3–5 minutes, scraping the sides and bottom of the cup at least twice with a flat plastic stir stick. Unmixed material that clings to the cup wall never enters the chemical reaction, which is why incomplete cup scraping is the most common cause of sticky, uncured spots. Keep stirring until the mixture runs clear and streak-free with no visible waves or separation. Cover your work surface with scrap paper or a silicone mat — drips are nearly impossible to remove once cured.

Your workspace temperature must sit at 70–75°F (21–24°C). Cold resin is noticeably thicker and traps more air; warm resin cures faster than you can pour it. If the bottles feel cool to the touch, submerge them in warm (not boiling) water for 10–15 minutes before measuring — this simple step cuts bubble volume dramatically for most beginners. Once combined, you have about 20–30 minutes of working time before the resin heats up from its own reaction and starts to gel. Craft Resin’s epoxy basics guide covers these temperature and timing details in more depth.

What’s The Right Pour Depth And Cure Time?

Pour each layer no deeper than 5–6 mm. The chemical reaction produces heat, and a thicker pour traps that heat inside — it can scorch the resin, causing yellowing, cracking, or a misshapen surface. If your mold is deeper than 6 mm, pour in two or three layers, letting each one cure completely before adding the next. Pour slowly from one corner and let the resin flow naturally across the mold; this pushes air toward the edges and minimizes bubble formation.

After pouring, let the piece sit for about 2 minutes so the largest bubbles rise to the surface. Skipping this rest means you are torching bubbles that have not risen yet, which wastes the heat. Then use a heat torch or heat gun in slow, sweeping passes to pop them — one quick pass from six inches away clears most bubbles without overheating the resin. This is also the moment to embed dried flowers, mica powder, glitter, or other dry inclusions. Use a toothpick to position them gently. Never use fresh flowers, damp leaves, or anything with moisture; water stops epoxy from curing and leaves cloudy, soft spots that never harden.

The resin is hard enough to remove from the mold after 24 hours. But full structural cure takes 3–7 days — during that week the piece reaches its final hardness, scratch resistance, and chemical durability. Keep the project at 70–75°F for the entire cure period and leave it completely undisturbed. Moving it during the first 12 hours can wrinkle the surface, shift inclusions, or create permanent distortion. Cover the curing piece with a cardboard box or clean cloth to keep airborne dust from settling into the finish.

Common Mistakes That Ruin Resin Projects

A handful of errors account for nearly every failed resin pour. Staying ahead of these five makes the difference between a keeper and a recycle-bin piece.

The quality of the resin itself sets the ceiling on your results — even perfect technique cannot rescue a weak or expired batch. Silicone molds labeled specifically for epoxy are the safest choice; plastic or metal molds rarely release cleanly. Our picks for the best epoxy resin for crafts can save you the trial-and-error of finding a reliable brand on your own. Buy fresh kits with a stated 1:1 ratio and a shelf life of at least 12 months unopened, then store them in a cool, dry place away from direct sunlight.

FAQs

Can I use regular kitchen cups to measure resin?

You can, but graduated measuring cups with clear markings are far more reliable. Identical cups make it easy to match the levels side by side, which is how you confirm a true 1:1 ratio without a scale. Disposable plastic cups work well and save cleanup time.

Why is my resin still sticky after 24 hours?

Incomplete mixing is the most common cause — resin that was never scraped off the cup sides did not get blended into the reaction. A room below 70°F or an inaccurate 1:1 ratio can also leave the surface tacky. If the piece is only slightly sticky, moving it to a warmer spot sometimes helps the cure finish over a few extra days.

Can I put hot drinks on a resin coaster?

Cured resin tolerates warm items, but hot mugs can damage the surface over time. The full 3–7 day cure is required before any use, including decorative coasters.