Answer
Fabric that has been in contact with Voltarol Emulgel burns more easily, creating a serious fire hazard and risk of severe burns near smoking or naked flames, and washing may reduce but not completely remove product build-up.
Sources for this answer
- Voltarol 1.16% Emulgel, gelHaleon UK Trading Limited · emc · SmPC §4.4 Special warnings and precautions for use · Version 15Document updated
Sources checked