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? Tips for using Flex Disc during sex My partner and I can feel Flex Disc during sex. Sex With Flex Disc How can I change my plan? Comments 0 comments Article is closed for comments.