Sliquid Spark is a pharmaceutical grade silicone personal lubricant and is SliquidÕs Premium silicone formulation infused with menthol. Super long- lasting and 100% waterproof, it is the perfect choice for those who need a lubricant to last. Made from an ultra-concentrated blend of pharmaceutical grade silicones, Sliquid Naturals Spark will last for hours with only a few drops and is easy to clean up with simple soap and water (except some fabrics). All Sliquid products are formulated by sensitive women, for sensible women.