Epoxy Tumbler Coat Guide
Getting epoxy and glitter amounts right means less waste and more consistent tumblers. Too little epoxy and you get bare spots; too much and it drips off the turner before curing. The amounts in this calculator are calibrated to standard tumbler diameters and typical epoxy viscosity.
Tumbler Coat Sequence
| Coat | Purpose | Glitter? |
|---|---|---|
| Coat 1 | Glitter base / adhesion coat | Yes — apply generously |
| Coat 2 | Seal glitter in place | Optional — very light |
| Coat 3 | Build depth and clarity | No |
| Coat 4 | Final finish coat | No |
Pro Tip: Mix your epoxy for a full 3–5 minutes, scraping the sides and bottom of the cup. Under-mixed epoxy has swirly streaks and soft spots after curing. A good stir stick and a warm workspace are your two best tools.
Glitter Epoxy FAQs
How many coats of epoxy does a tumbler need?▼
Most tumblers need 2–4 coats: a glitter base coat, a seal coat over the glitter, and 1–2 finish coats for depth and durability. Each coat should cure 24 hours on a turner before the next is applied.
What's the correct epoxy ratio for tumblers?▼
Most tumbler epoxy uses a 1:1 ratio by volume (equal parts Part A and Part B). Always follow your specific brand's instructions — using the wrong ratio results in epoxy that never fully cures and stays tacky.
How much glitter do I use per coat?▼
For a glitter base coat, approximately 0.5 oz of fine glitter or 0.75 oz of chunky glitter per 0.5 oz of mixed epoxy gives good coverage without overwhelming the resin. Apply glitter while the epoxy is wet and tacky, turning continuously.
Why is my epoxy orange-peeling or not smooth?▼
Orange peel texture usually means the epoxy was too thick (too cold) or applied in a layer that was too heavy. Warm your epoxy to room temperature (70–75°F) before mixing, and apply thinner coats — it's better to add a coat than fix a mess.