Some Reason Why Will Epoxy not Stick to Cured Epoxy and Other Materials

Updated: 13 Jul 2023


The resin is used in various industries from flooring to your hobby DIY project. When my team start working on epoxy initially they stack on whether epoxy sticks to cured epoxy. But after analysis they get epoxy will stick on its other layer.

Before applying the second layer you need to sand the first layer. But make sure you sand enough layers to stay. Properly clean the surface and remove any debris on the floor. The next layer will take more time to dry because it depends upon humidity and temperature.

In this blog, you should know does resin sticks to the cured resin and the reason why it did not cured well in some conditions.

Reason Why You Want to Coat Existing Epoxy

There are many reasons why you need to coat your existing resin layer. Although it was tough and durable, they are less likely to damage, but wear and tear make it broken. Applying the second layer makes it more durable, uses for high wear and tear.

Here are some reasons why you apply the second coat.


Coating with the resin gives a hard and durable surface but heavy weight makes it broken. Falling heavy weight on the coating makes it broken and less durable. The broken layer cannot be repaired with any material. Applying another layer while sanding the existing layer makes it usable again.

Wrong Application Use

Some new carpenters apply epoxy without knowing its proper uses and instructions. Applying epoxy without a base coat is another reason to break the resin layer. Some other reasons are:

  • Incorrect mixing
  • Issues with humidity or temperature
  • Poor preparation
  • Not proper Drying


A thick layer also makes it possible to apply another layer. The thick layer gets easily brake with heavyweight. Fallen small things also make it easily broken. Add too many chemicals while mixing also make it easily broke-able.


Does Resin Stick with Materials:

Epoxy will stick strongly with some materials and give more durability and flexibility than normal. It will make a strong chemical bond with it and a high finish and clean surface.

Some of the material that works well with epoxy are as follow:

  • Wood
  • Copper
  • Stainless Steel
  • Aluminum
  • Stone
  • Iron
  • Ceramics
  • Cured Epoxy
  • Concrete
  • Plastic
  • Paper
  • Ceramics
  • Tin
  • Zinc
  • Glass
  • Fabric
  • Polymer clay

These materials are mostly used for DIY projects to personal hobbies. Epoxy uses with these item make them flexible and more durable. Before applying resin make sure sanding and well cleaning of material.

Things Epoxy Does not Stick 

As side epoxy stick strongly with some items, there is some item resin that did not stick. Avoid using resin to use in your project while playing with these items:

  • Oil Surface: Oily surfaces prevent epoxy to form a strong bond. Remove all oil that resin makes a strong bond.
  • Melamine: It is a smooth and polished surface that prevents to adhere resin well.
  • Plastic: For some plastic, the epoxy did not adhere well because it is resistant to epoxies.
  • Rubber: Soft and flexible rubber did not stick to epoxy for their well-being.
  • Acrylic: Well polish surface prevent to epoxy and its other comparative.
  • Glass: Some smooth glass is resistant to epoxy and other chemicals as well because it has a smooth and crystal surface.
  • Duct Tape: A nonstick tape resistant to epoxy and other chemicals as well. The sticky side will use to hold the mold resin together.
  • Damp Wood: These wood are highly water friendly and pretend to stick resin and other materials as well.
  • Asphalt: It is an oily element and is always resistant to resin and other glues to stick.
  • Electric Tape: It is made with flexible plastic and resistant to resin and other glue because it has the flexibility of rubber.
  • Hot Glue: Hot glue also has properties of the resin. Hot glue worked while heating so it was resistant to epoxy and other chemical bond-making materials.
  • Leather: It is a soft material. It may stick but not too much and with time it loses its bond and broke leather.
  • Nylon: Nylon does not make enough wet to make a bond with epoxy.
  • Packing Tape: The packing tap has a shiny surface and is resistant to resin. It also adheres to other glue as well.

There are always some scenarios when you cannot apply a second coat on the existing floor. These movements give you some headaches because they need more repairing and some tricks to handle.

When your existing floor has more heat than normal it shows floor coating more than resin coat. Applying a second coat to these spaces gives you more broken and expensive. Before applying any paint you need to work on your floor heat.


Another option is when your floor is peeling and you try to apply a second paint coat. Accessibility of water again makes it more damaged and less used for other purposes.

Issues with poor adhesion

During applying epoxy your negligence let you in trouble. These challenges appear again and again if you do not proper care during installation. Some issues during the process are common like:

Inadequate surface preparation

  • Read the importance of proper surface preparation before applying the mixture.
  • Follow steps for surface preparation like cleaning the surface, removing contaminants, drying it well-removing oil if any.
  • Highlight the area for the usage of etching or sanding to create a rough surface for proper adhesion.

Improper mixing or application

  • Mix the exact ratio of resin with proper blending.
  • Read the instruction carefully and measure space with the proper tools.

Substrate the Contamination

  • Identify the common contamination such as oils, solvents, and any dirt from the surface.
  • Suggest appropriate methods to clean these contaminants.
  • Advising on the importance of clean surfaces during and after epoxy installation.

Repairing or re-bonding cured epoxy

Cured resins re-bounding easily without installing a new surface. It cost you less and requires fewer materials as needed. Some tips for bonding epoxy to cured epoxy surface are as follows:

Identifying areas of failure

  • Identify the area where epoxy has not adhered properly.
  • Identify visual cues like cracks, bubbles, and delamination as signs of adhesion failure.
  • Use a touch or tap test to detect weak sport or detached surface areas.

Appropriate techniques for re-bonding

  • Mechanical and chemical methods use for rebounding.
  • Mechanical technical like sanding, and roughing for proper adhesion.
  • Chemical methods involve epoxy primer or other compatible adhesion.

Some Common Questions and Answers

Can I put another coat of epoxy over uncured epoxy?

Yes, but before applying the resin coat you need to sand all your existing layers well. Sanding makes it stay for other coats or layers without creating any problems.

How will epoxy stick to cured epoxy?

Epoxy stick to cured epoxy with sanding and proper cleaning surface for a second coat. Some resin material stick to the second coat strongly but some of its competitors do not stay well.

Does epoxy bond well to epoxy?

Yes, it makes a good bond. Before making good bound sand well and remove all bubbles and oily materials from the surface.

Can you fix the epoxy after it dries?

Yes, but you need to make it sand well. Remove bubbles and oily material and dirt from it. Make sure you have a base coat with a wall covering.


Epoxy is highly used in all industry and give excellent result. My team did it well to find a possible answer on how to fix uncured resin and its stick with the first coat and some other materials.

Can you pour epoxy over cured epoxy without removing all layers and you did not want to start work from scratch? Removing uncured epoxy by sanding it and removing all unnecessary material from the surface to make it more durable.

You can fix your cured resin without getting into trouble. Epoxy sticks to other materials that are friendly to chemicals. I and my team may be wrong at some point we mention above. We would welcome you to correct us and give your points of view. Comment if you are going to give us some points.

Nouman Ali

Nouman Ali

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