Evolution Air filter oil has all the great dirt stopping tackiness and high air flow characteristics as the original No-Toil Filter Oil, but without the alcohol. Evolution is compatible with any brand of air filter and, without the alcohol solvent, the foam element will last longer and glue seams wont delaminate. Evolution is compatible with the original No-Toil Filter Cleaner and cleans amazingly easy and quick and will shock your senses with how clean it will get your dirty filter. For the oil to tack up, it may take as long as five or more hours. No-Toil recommends letting it set out overnight before use. No alcohol. Non-flammable. Only "air shippable" foam air filter oil in the world. Compatible with all foam air filters. Foam friendly (will not degrade foam). Hi-Tack. Completely biodegradable and non-toxic. Waterproof: will not wash off filter with water alone. Super easy to clean using No-Toil Filter Cleaner. Green Standard leader. Note: The water carrier drying time will vary depending on climate and relative humidity and will require at least 5 hours to "tack up" sufficiently for use. Overnight drying is recommended. Acceleration of drying time can be accomplished by direct sunlight or fans. The (2) filter system is recommended where one filter is always on the bike and one being "prepped". For those riders who dont have time for Evolutions longer drying time, then the original No-Toil filter oil is the correct choice.