Gamsol is the safest, cleanest and 100% pure odorless mineral spirit. Gamsol is strong enough to thin oil colors and Gamblin alkyd resin mediums and can be reused until the solvent will no longer clear. Gamsol cannot dissolve damar or other natural resins, and will cloud damar varnish if used as an extender. This is considered a hazardous item and can only be shipped via ground service within the 48 contiguous states. Due to new regulations, 128 oz. size gallons of Gamblin Gamsol are not to be sold to anyone in the following states: Connecticut, Delaware, Maryland, New Hampshire, Utah, and California. We apologize for any inconvenience.