Question: Does Raychem have a flame retardant product?
Answer: Absolutely. The most commonly sold flame retardant heat shrink tubing is Raychem's FCSM product. It is very, very similar to the WCSM product; but flame retardant. It is rated for use at 2000 volts. FCSM is available either coated (with a sealant) or un-coated (no sealant).
Available in 1200mm sticks (4 feet) FCSM and having a 3:1 shrink ration; FCSM is a very versatile product; capable of serving multiple duties.