How To Sand Epoxy Resin?

Nick Shushan
By Nick Shusan , Epoxy Expert and the CEO of NYC Epoxy Flooring.

June 14, 2022

To get the best result out of your epoxy resin material, sanding is necessary. To sand an epoxy resin workpiece, use an orbital sander with adequate dust extraction to smoothen the surface vertically and horizontally. Then use either of the following sandpaper grit sequences for the finish: 120 grit, 150 grit, 180 grit, 220 grit, 320 grit, 500 grit, 1000 grit, and 1500 grit.

However, you should need only 120 grit for the initial abrasion. But if you wish to polish the resin surface, you can go for higher grits.

As you read further, you will see the material needed to sand epoxy resin and how you should do it. In addition, you will see how you can shine epoxy resin after sanding.

What Is the Best Way to Sand Epoxy Resin?

Wet sanding is recommended when sanding epoxy resin because it requires waterproof sandpaper. Waterproof sandpaper is manufactured from silicon carbide and comes in a variety of grit sizes. It’s recommended to start with at least 120 grit because even the tiniest grains can produce holes in the epoxy.

Using a dry sheet of sandpaper is better if you are new to epoxy sanding, but not advisable. It’s better for you to wet-sand epoxy rather than dry-sand it. Wet sanding is the most suitable way for scrubbing epoxy resin in most situations because dry sanding your resin item with a random orbital sander, or just by hand, produces a lot of heat owing to pressure between the different surfaces.

How Do You Polish Epoxy Once It Is Sanded?

Pour a small amount of the translucent polishing solution on the fabric or linen cloth and dampen it gently. Then gently wipe the cloth throughout your work in slow, small circles with gentle force. It could take a while for the material’s surface to get the required finish.


To sand an epoxy resin surface or material, you need an orbital sander with good dust extraction, and it should be done sideways (vertically and horizontally). Afterwards, use either a 120, 150, 180, 220, 320, 500, 1000 or 1500 sandpaper grit sequence for the finish.