Sliquid Spark Booty Buzz Stimulating Silicone Lube 4.2 fluid ounces. Sliquid Spark is a pharmaceutical grade silicone personal lubricant. It is Sliquid's 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 and clothing!. All Sliquid products are formulated by sensitive women, for sensible women.