What is Spunk Pure Silicone Lubricant? Well it is just that it is a personal lubricant that has a silicone base instead of a water base. Silicone lubricants can last for a good while without having to reapply like I have experienced with some of the water based lubricants I have used in the past. Spunk Lube is in all honestly the very FIRST Pure Silicone lube I have used and I have to say I am impressed and I love it! It has partially replaced my other lubricant that I have used for years. Spunk Lube is a hypoallergenic lubricant in all 3 formulas so you are less likely to have an allergic reaction to this lube.