Is the BURST Floss waxed? October 22, 2021 20:01 Updated Yes, The BURST Floss uses Microcrystalline wax, there are No PFAs. Related articles Is the BURST Floss biodegradable? Why does the BURST Floss get stuck in my teeth sometimes? How long is the BURST Floss Refill and how long should it last? Can I buy another BURST Floss case by itself? How thick is the BURST Floss strand?