Sliquid Spark is a pharmaceutical grade silicone personal lubricant. It is SliquidÕs Premium 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 from some sheets & clothing!). All Sliquid products are formulated by sensitive women, for sensible women.