Flame Height Requirements
Per ASTM F2417, a candle must not produce a flame height exceeding 3 inches (76mm) above the top of the candle or container during normal burning under controlled conditions.
- Flame must not ignite materials placed at a standard safe distance.
- No sustained flaring that could ignite nearby materials.
- Afterglow must extinguish within 2 minutes after the flame is extinguished.
Melt Pool & Drip Requirements
- Dripping wax must not ignite if it falls onto a non-combustible surface during testing.
- Pooling wax must stay contained within the vessel for container candles.
- Pillar candle flames must not contact the outer wall of the candle.
- The melt pool must never overflow the container.
Container integrity is critical — jars must withstand thermal shock across the full burn cycle.
Multi-Candle & Proximity Burn Rules
- Space multiple candles at least 3 inches apart when burning simultaneously.
- Candles must not pose an ignition risk to surfaces 12 inches below overhead cabinetry.
- Burn time per session should be limited as specified on the label (typically 4 hours maximum).
Content last reviewed: April 2026
Disclaimer: This reference guide is provided for educational purposes only and summarizes publicly available information from ASTM International, the National Candle Association, and related bodies. It does not constitute legal advice. Always consult the full official standards documents and a qualified regulatory professional before manufacturing candles for commercial sale.