Can I use lube with Flex Discs? The Flex Company December 18, 2020 00:33 Updated Follow Yup! Flex Discs are totally safe to use with water-based lubricants. Have another question? Contact us here. Related articles When having sex, will Flex Disc prevent my natural vaginal lubrication? Mess-Free Period Sex™️ w/ Flex My partner and I can feel Flex Disc during sex. How can I change my plan? 10 tips for using Flex Disc Comments 0 comments Article is closed for comments.