Problems And Solutions To Common Epoxy Resin
Epoxy Resin is a highly versatile material used in DIY, woodworking, resin art, jewellery making, flooring, and river tables. When mixed correctly, it creates a crystal-clear, durable, and glossy finish. However, many beginners and even professionals face resin problems and epoxy resin problems such as bubbles, sticky surfaces, cloudy finishes, or colour separation.
If you are dealing with resin issues or wondering why is my epoxy resin separating, this complete guide will help you understand the causes and provide step-by-step solutions to fix every common resin problem.
Cloudy or Milky Epoxy Resin
Reasons epoxy resin turns cloudy
Cloudy resin is one of the most common epoxy resin problems, especially in the UK due to humidity and cold temperatures. This type of resin issue can be caused by:
- High moisture or humidity
- Cold working environment
- Wet mixing tools
- Uncured or improperly mixed resin
- Too many trapped microbubbles
Environmental conditions play a big role in resin problems, and poor temperature control often leads to hazy finishes.
How to repair cloudy resin surfaces
- Work in a controlled temperature (20–25°C)
- Use a dehumidifier in damp areas
- Warm resin bottles slightly before mixing
- Ensure all surfaces are completely dry
If already cured, sand the surface and apply a fresh clear coat to fix this resin problem.
Sticky epoxy resin troubleshooting guide
Why It Happens
Sticky resin is another major epoxy resin problem caused by:
- Incorrect mixing ratio
- Poor mixing technique
- Unmixed resin on container edges
- Pouring too thick layers
This is one of the most frequent resin issues beginners face.
How to Fix Sticky Resin
- Remove uncured resin
- Clean with isopropyl alcohol
- Sand lightly
- Reapply properly mixed resin
Accurate measurement and proper mixing are essential to avoid this resin problem.
Preventing and removing air bubbles in resin
Why It Happens
Bubbles are common resin problems caused by:
- Fast mixing
- Cold resin
- Pouring on porous surfaces
- Rapid pouring
How to Fix Bubbles
- Mix slowly
- Warm resin before use
- Use a heat gun or torch
- Seal porous surfaces first
Peeling or Delamination
Why It Happens
This epoxy resin problem occurs when:
- Surface is not prepared
- Dust or oil contamination
- Applying on smooth glossy surfaces
How to Fix Peeling Resin
- Sand the surface
- Clean thoroughly
- Reapply resin correctly
Separation or Colour Problems of Pigment
Why It Happens
If you're asking why is my epoxy resin separating, the main reasons include:
- Too much pigment added
- Low-quality or incompatible pigments
- Improper mixing
This is a common resin issue in coloured resin projects.
How to Fix Pigment Problems
- Use recommended pigment ratios (2–6%)
- Mix pigment properly before adding hardener
- Use high-quality epoxy-compatible pigments
Fish Eyes or Craters in Resin
Causes of fish eyes in epoxy resin
Fish eyes are frustrating resin problems caused by contamination:
- Silicone
- Oil or grease
- Wax residues
How to Fix Fish Eyes
- Clean surfaces thoroughly
- Avoid silicone products nearby
- Sand and recoat
Burning, Splitting or Discoloring
Why epoxy resin overheats and cracks
Overheating is a serious epoxy resin problem caused by:
- Pouring too thick
- Wrong resin type
- High temperatures
Fixing cracked or yellowed epoxy resin
- Use deep pour resin
- Pour in layers
- Control temperature
Uneven or Wavy Surface
Causes of uneven resin surface
This resin problem happens due to:
- Unlevel surfaces
- Airflow during curing
- Uneven pouring
How to level epoxy resin surface
- Level your workspace
- Protect from dust and airflow
- Sand and apply top coat
Best practices to avoid epoxy resin mistakes
To avoid common resin problems and resin issues, follow these tips:
- Measure accurately
- Mix thoroughly
- Work in ideal temperature
- Use high-quality materials
- Prepare surfaces properly
Frequently Asked Question
Why has my epoxy resin not hardened after 24 hrs?
This common epoxy resin problem is usually caused by incorrect ratios or low temperature. If still sticky, remove and reapply.
Conclusions
Understanding resin problems and how to fix them is key to success. Most epoxy resin problems like bubbles, cloudiness, or separation, can be avoided with proper technique and preparation.
With the right approach, you can eliminate resin issues and achieve professional results every time.
Alex
A very helpful guide that explains common epoxy resin problems and simple fixes. Great for quickly solving resin issues and improving results.
Apr 07, 2026