Cause 1: Pure soy wax with no added paraffin.

Pour cooler (around 52–57°C) and avoid temperature swings during cure.

Cause 2: Temperature swings during cure or storage.

Cure away from direct sunlight and heat sources.

Cause 3: Excessive fragrance load forcing wax to re-set unevenly.

Add a small amount of coconut oil (1–3%) to soften the crystal structure.

Appearance

White frost crystals on soy candles

Frosting is the natural recrystallisation of soy wax. It is a quality indicator (proof the wax is pure soy) but customers often read it as a fault. Mitigate, not eliminate.

Written by Maya Holloway

Likely causes

Pure soy wax with no added paraffin.
Temperature swings during cure or storage.
Excessive fragrance load forcing wax to re-set unevenly.

How to diagnose

Confirm wax is 100% soy (not a parasoy blend).
Check storage temperature stability.

What to change next batch

01
Pour cooler (around 52–57°C) and avoid temperature swings during cure.
02
Cure away from direct sunlight and heat sources.
03
Add a small amount of coconut oil (1–3%) to soften the crystal structure.
04
Add a customer-facing note: frosting is proof of natural soy.

Read deeper

Fragrance load and IFRA: why your max load varies
IFRA category 12 caps candle fragrance load. Here's what the standard says, and why exceeding wax max backfires.