Do I Need to Sand Between Resin Coats on Walls?

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When applying resin to walls, achieving a lasting, flawless finish is all about paying attention between coats. Sanding might seem like an extra step, but it can make a real difference—especially over multiple layers.

Why Light Sanding Matters

Sanding between resin coats creates a slightly roughened surface, giving the next layer a better key and helping to prevent issues such as delamination or uneven finishes. This is particularly essential if more than 24 hours have passed since your previous application, as resin surfaces can become too smooth for optimal adhesion after curing.

The process doesn’t require aggressive sanding—a gentle pass with fine-grit sandpaper (around 320–400 grit) is usually enough to remove gloss and provide some grip for the next coat.

How to Sand and Prepare for Recoating

• Wait at least 48 hours for the previous coat to fully harden before sanding.
• Use fine-grit sandpaper and apply light, even pressure, focusing on removing any shine rather than sanding through the resin.
• After sanding, wipe away all dust with a damp, lint-free cloth and allow the surface to dry thoroughly before recoating.

For large, vertical surfaces, using specialised tools like the Resin & Paint Application Rollers can help achieve an even finish and speed up the process, especially alongside careful surface prep.

When This Step Is Crucial

Sanding is especially important if you’re leaving more than a day between coats, correcting surface imperfections, or seeking the best bond for your top (finish) layer. For products such as “Vertical Glass” Resin Wall Coating, which is designed for decorative vertical finishes, proper sanding is key to a durable, polished result.

Related products

• "Vertical Glass" – Thick Resin Decorative Wall Coating
• Resin & Paint Application Rollers – Short-Pile, Large, and Sponge Types
• "Art Pro Deluxe" – Ultra-High Viscosity Epoxy Resin for Artists

Related guides

• How Do You Apply Resin To The Wall

Taking the time to sand between resin coats ensures your wall application stands the test of time. For more tips on wall resin application, return to our main guide: How do you apply resin to the wall?