Darcoid FVMQ (Fluorosilicone) Material Compound Data Sheet #6001. Original test data stored in the Darcoid Compound Database. This material is available to run in our manufacturing partner plant in N America and Hardness Shore A (+/- 5) is 70. FVMQ (Fluorosilicone) meets MIL-DTL-25988, TY I, CL I, GR 70, UL listed certification.