The basics A gel version of SDA-40 alcohol and isopropanol that can be used in any application where 99% isopropyl alcohol is used. The benefits It has a reduced alcohol scent, will not drip or run, and is excellent as a vehicle for alcohol-based color applications. The uses You can use it to thin out rubber mask grease paint, or thinning other types of makeup.  Use it as a prep skin for any airbrush application of temporary tattoos or alcohol based skin paints.  It is also great to use to remove alcohol based makeup. The bottom line ISO-Gel is the easiest and cleanest version of 99% alcohol ever made.