How do you fix white spots on epoxy?

White spots on your epoxy can be caused by multiple things, but your best bet is to let it cure longer, stirring thoroughly, and then sanding.

You may have to remove or sand the entire layer of epoxy off as well. Some people use a hair dryer to get rid of white spots on cured epoxy, while others recommend mixing in some black pigment powder to cover up white spots on your next round of epoxy. Here’s how you do all that:

Why does my epoxy have white spots?

Your epoxy is white because there are air bubbles in the mixture, which have not been completely pressed out. This can happen for a number of reasons:

Why does my epoxy have white spots

  • You may have mixed the components too quickly or added them too quickly. If you notice that your mixture is bubbly and frothy rather than smooth and homogenous, then this is likely to be your problem.
  • If you used too much hardener, it will cure faster than normal and leave little time for the solvent to evaporate from between the molecules of resin before they set together. When resin cures properly with solvent separating its molecules, it forms a clear coating; when it cures without enough solvent to separate those molecules, however, it turns milky white instead (and sometimes becomes sticky).
  • Using an incorrect catalyst can also cause bubbles in your epoxy coatings because some catalysts are designed specifically for particular kinds of resins—if you use one type on another kind of resin without following instructions carefully (or at all), then your results may suffer as a result

How do you fix epoxy spots?

Here are some ways to fix a white spot on epoxy:

  • Sandpaper. Use a sanding block and coarse grit sandpaper to remove the white spots. Once they’re gone, you can use epoxy to fill in the spots and make sure your surface is smooth again.
  • Paint. If you don’t want to fill in your white spot with another layer of epoxy, you can simply paint over it instead! This can be helpful if your project needs only light touch-ups or if there’s just one tiny area that needs fixing—you don’t have to go through all that unnecessary work when you’re already halfway done applying your finish coat! Just remember not to get any paint or primer on areas where no color has been applied yet because it will mess up how attractive (or unattractive) these colors look together once everything dries again…

How do you fix epoxy craters?

To fix a crater, use a plastic putty knife to remove the excess epoxy. Next, dampen a clean cloth and wipe off any remaining epoxy.

How do you fix a mistake in epoxy?

How do you fix a mistake in epoxy

If you made a mistake with the epoxy and your board is not covered in white spots, here are some ways to fix it.

Option 1: Use a putty knife or razor blade to scrape off the epoxy.

Option 2: Cut out the epoxy with a razor blade, then use sandpaper to remove any remaining residue (this will make more dust).

How do you get white bubbles out of resin?

If the bubbles are small, you can push them out with a toothpick. If they’re larger, insert a pin into the side of the bubble and it will pop.

A needle also works well if you have one on hand; do not use a sharp object such as a razor blade or paper clip to poke holes in your epoxy because this could harm your project!

How do you get white bubbles out of resin

If you still need help removing white spots from your epoxy resin fix them by using an airbrush compressor or jig saw with an attachment that creates heat.

Using this method each time before applying more layers of resin will ensure there is no bubbling after drying which could lead to cracks forming due to too much stress on certain parts causing breakage later down the line when trying something different like mixing colors together instead of just focusing on one color throughout the whole process without adding any extra steps afterward like painting over top coat etcetera so please take note before putting new layers down – don’t forget about old ones underneath!

Can you sand epoxy and recoat?

You can sand epoxy and recoat it. To do so, you’ll need to have the following supplies on hand:

  • Sandpaper (100-grit will work)
  • Mineral spirits or paint thinner
  • A drop cloth to protect surrounding surfaces from overspray. Use plastic or paper tarps instead of fabric tarps, which are flammable. Also, avoid using cardboard as it’s not absorbent enough for clean-up purposes.

Sanding epoxy is super easy—just make sure that your sandpaper is wet before starting so that the dust stays on the paper and doesn’t get into your air supply! Once you’ve finished with one layer, wipe down all of your tools with mineral spirits or paint thinner so they’re ready for another coat; this will help prevent cross-contamination between coats during application.

How do you fix clear epoxy?

While it’s not always possible to fix a blemished epoxy floor, the solution depends on the amount of damage. In some cases, you can remove white spots by scraping them off with a putty knife or razor blade.

Using heat from your hair dryer or heat gun will also help soften up hardened epoxy so that it’s easier for you to scrape away any residue.

Can you pour epoxy over cured epoxy?

Can you pour epoxy over cured epoxy

In short, you don’t want to pour epoxy over cured epoxy.

Why? Because pouring epoxy on top of cured epoxy is essentially like trying to put a Band-Aid on a blister after it’s popped.

You’ll have to deal with the mess that results from trying to pour your new coat into existing layers of goop and you’ll be left with an even more unsightly result than before. If the area in question has hardened correctly and you’re sure there are no patches missing, then by all means continue with pouring your new layer on top!

But if any areas remain soft or uncured, invest some time into sanding them down before adding another layer—you’ll save yourself both time and hassle as well as ensure a professional finish!


The best way to fix white spots on epoxy is by using a clear coat and a mix of sanding sandpaper.

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Martin Flood

Martin Flood has been working in the construction industry for over 20 years as a general contractor with expertise in remodeling projects that are large or small. He has furthered his career by specializing in epoxy resin flooring, providing excellent service to both commercial and residential clients. Martin’s experience enables him to offer professional advice on how to choose the right type of project based on your needs and budget.

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