Epoxy resin is a liquid polymer that cures into a solid, clear coating. It’s used as a protective finish for wood or other materials and as an adhesive.
When pouring epoxy resin to make clear coatings, it’s important to choose the right thickness. Different thicknesses are needed depending on how you want your project to look and what you’re using the resin for.
What happens if you pour epoxy resin too thick?
When epoxy resin is poured more than 1/8” thick, it will not cure properly. At this thickness, the epoxy cures from the outside edges toward the center of the pour. Since heat is generated during the curing process, a reaction called exothermic heat occurs. The outside edge of your pour will get warmer and cure faster than the middle and bottom of your piece.
If the thickness exceeds 2” to 3”, it’s possible that it won’t even fully cure. If you pour resin more than 4” thick, it is likely that your project will trap air bubbles in its center and not fully cure properly of top to bottom.
Your project may also be cloudy at this point if you don’t use enough vibration or tapping to release trapped air bubbles.
Another issue with pouring too much resin at once is that it may be too thick for whatever purpose you intend for your piece (for example: using as a tabletop). It may take longer to dry or even never dry completely because heat can’t escape from inside the piece due to its thickness—which will cause an exothermic reaction as we discussed above.
Table of Contents
- What happens if you pour epoxy resin too thick?
- How thick can you put on epoxy?
- How thin can you pour deep pour epoxy?
- How thick should epoxy be on table top?
- How long does deep pour epoxy take to harden?
- Can I pour epoxy over epoxy?
- How thick can you pour self leveling epoxy?
- How do you apply thick epoxy?
How thick can you put on epoxy?
First, let’s take a look at the most common size for epoxy resin. A standard set of Bar & Table Top Epoxy Resin covers approximately 25 square feet. This equates to 2-3/8” (60 mm) of cured epoxy. In this article, we’ll be using that as our example.
How thick can you pour a single layer of epoxy? How thick can you pour a single layer of self-leveling epoxy? How thick can you pour a single layer without self-leveling? These are all great questions!
How thin can you pour deep pour epoxy?
- Thinner pours are better for smaller projects such as jewelry or coasters. If you want thicker pours, use less hardener in the mixture.
- You can pour deep pour epoxy resin up to 2 inches deep in one go. For depths greater than this, it’s best to pour your epoxy resin in layers.
- Use a heat gun to remove any bubbles and promote curing. Keep the resin out of direct sunlight and away from windows so that it doesn’t cure too quickly. Now that we’ve covered how to mix your epoxy resin, let’s discuss whether you can add colorants such as powdered pigments or paint to the mixture.
How thick should epoxy be on table top?
Thickness for an epoxy resin table top is best when it’s between 1/8″ and 3/16″, which will allow the user to build up the edges without causing a mess.
To create this thickness of epoxy resin, you need to pour a minimum of 1 gallon per every 50 square feet. This measurement is a good rule of thumb for first-time users who aren’t sure how much epoxy should be used.
How long does deep pour epoxy take to harden?
Depending on the ratio of resin to hardener and the temperature and humidity, Deep Pour Epoxy will harden in 18-36 hours. You should wait at least 16 hours before removing or repositioning cured epoxy.
If you’re adding a second coat, you should wait 36 hours before pouring. For additional coats (which are recommended), you can get away with waiting 24 hours if it’s warm enough (80+ degrees), but 36 is recommended for cooler temperatures.
Can I pour epoxy over epoxy?
Yes, you can pour epoxy over epoxy. However, while you can do that, we recommend that you sand the surface of the first layer of epoxy before pouring another layer over it.
Not only will this help ensure that your second coat of epoxy adheres properly to the original surface, but it will also allow you to create a better finish on your project.
We also recommend that you use a thinner layer of epoxy when pouring on top of another coat of resin. This is because if your layers are too thick, any air bubbles in the newly poured resin won’t have enough time to rise up and be removed from the resin before curing takes place.
Also keep in mind that thicker layers are more likely to create uneven coats and lead to poor coverage, which could result in problems such as yellowing or clouding down the road.
How thick can you pour self leveling epoxy?
For self leveling epoxy, you can pour a maximum of 2 inches. This is the max thickness that is recommended by most manufacturers. However, pouring epoxy resin over 2 inches thick can cause issues with the curing process.
If you need to pour epoxy thicker than 2 inches you should add multiple layers of 1/2 inch or less. That way, you will reach the desired thickness while keeping within the recommended maximums. For each layer that you pour, it will be necessary to let it fully cure before adding another layer on top of it.
How do you apply thick epoxy?
Most epoxy resin projects will require you to pour a thick layer of epoxy. This isn’t normally difficult, but there are some tricks to keep in mind when pouring large amounts of resin. So how do we apply thick epoxy?
With Epoxy, the question of how thick you pour epoxy resin is best answered by what type of epoxy you are using. If you are using a fast-curing epoxy, you will want to pour it thinner and in multiple thin layers as opposed to one thick layer. This will reduce the likelihood of overheating within your resin which could result in incomplete curling or cracking.
Pouring your epoxy over a large surface area can also lead to bubbles being trapped if there isn’t enough airflow across the epoxy so make sure that when pouring over large areas you use a blowtorch to remove any bubbles.
Epoxies are typically used low viscosity liquids but their viscosity can be increased through heat application or vacuum degassing. The ability for them to act in a viscous state can help with pours.