Yes, pjur serums are silicone-based. However, the silicone in these products has a different function to the silicone in pjur personal lubricants. The film does initially have a lubricating effect. However, its main purpose is to protect the skin and reduce sensitivity. In contrast to silicone-based personal lubricants, the silicone in the serums is only used as a carrier for the film-forming agents. As such, we recommend using the serums in combination with pjur personal lubricants as these will provide long-lasting lubrication.