I seal my glitter with mod podge clear acrylic spray

How to Seal Glitter using Mod Podge - Makes, Bakes and Decor

How to Seal Glitter (Prevent It from Falling Off!)

Mod podge, glitter, let dry. Repeat. Seal off with clear acrylic sealer. Did it on a plain plastic phone case.

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Mod Podge ® Iridescent Acrylic Sealer

Mod Podge Iridescent Acrylic Spray Sealer, 8 oz

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