Title

Why Your Resin Wont Cure Fast and How to Fix 

Why Your Resin Won’t Cure Fast

and What You Can Do About It

You mixed your resin poured it perfectly and waited. But hours or even days later it’s still tacky soft or just not setting the way it should. If you’re wondering why your won’t cure fast you’re not alone.

Whether you’re working on a DIY

craft epoxy art or a countertop project—curing issues are frustrating but fixable. Let’s break down the most common causes and show you exactly how to troubleshoot them.

1. Wrong Resin and Hardener Ratio

Mixing your and hardener in the wrong ratio is one of the most common reasons it won’t cure.

Why it matters:

 needs a very specific chemical reaction to cure. Too much or too little hardener will stop or slow that reaction.

How to fix it:

Always follow the manufacturer’s ratio exactly. If it says 1:1 mix precisely 1:1 by volume unless stated otherwise.

 Recommended Product:

Pro Marine Supplies Table Top Epoxy – great for beginners with clear ratio instructions

2. Inadequate Mixing

Even with the right ratio, poor mixing can cause parts of your project to remain sticky or soft.

Symptoms: Patchy soft spots, sticky areas, or uneven finishes

Fix: Mix thoroughly for at least 3 to 5 minutes. Scrape the sides and bottom of your cup often.

Tip: Use two mixing containers.

Mix in one, pour into the second, and mix again.

3. Cold or Humid Environment

Resin is very sensitive to temperature and humidity. If your room is too cold (below 70°F or 21°C) or too humid the cure time will slow dramatically.

Why it matters:

Cold slows the chemical reaction. Humidity can also cause cloudiness or amine blush.

Solution: Work in a room between 72°F and 78°F (22°C to 25°C) with low humidity.

You might consider using a small

space heater or dehumidifier for consistent conditions

4. Expired or Old Resin

Yes, resin can go bad. Using that’s past its shelf life can cause curing issues—even if you mix it perfectly.

How to tell: resin

Yellowing in the bottle, separated components, or strange smell

Fix: Always check the expiration date and store  in a cool dark place

Tip: Once opened, most are good for about 6 months.

5. Too Thick of a Pour resin

Pouring too thick all at once can trap heat or actually slow the cure depending on the product.

Symptoms: Outer layer cured but inner part still soft or warm

Solution: resin

Pour in thin layers no more than 1/8″ to 1/4″ at a time unless using deep pour epoxy

What To Do If Your Still Won’t Cure

If your resin hasn’t cured after 24–48 hours: resin

Leave it longer: Some resins need up to 72 hours depending on the project size and room conditions

Use gentle heat: A heat gun or warm lamp can help kickstart curing

Remove and restart: If it’s still gooey after 3 days, you may need to scrape it off and reapply with a fresh batch

Final Thoughts resin

that won’t cure can be a headache, but with the right steps you can avoid most issues before they start. Accurate mixing, the right room temperature, and fresh materials make all the difference.

If you’re struggling,

try reviewing our [Insert Internal Link: Step by Step Checklist] for a smoother process next time.

Quick Fix Table

Problem Cause Fix

Still sticky Wrong ratio Measure exactly
Soft spots Poor mixing Mix thoroughly
Not hardening Cold or humid room Control environment
Uneven cure Thick pour Use thin layers
Won’t cure at all Expired Replace with new

Still having trouble?

Join our [Insert Internal Link: Resin Help Forum] or check out in-depth resin tutorials from experts like Art

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