The original No-Toil Air Filter Oil is a super-tacky, dirt-grabbing, water-resistant filter oil that increases horsepower. It will not wash out with gas, solvents or water alone. But, you'll be amazed at how quickly and easily your filter will come completely clean with the highly concentrated No-Toil Air Filter Cleaner (sold separately) and water. The filter will be super tacky and ready for use quickly due to the alcohol carrier. This oil will work on both foam and fabric filters (K&N). Super tacky, sticky and amazingly good at stopping dirt. Engineered to not only provide adequate engine protection, but to also focus on performance. Increased airflow due to Micro-Flow Technology, thus providing a horsepower increase by decreasing the resistance of the air travelling through the foam air filter. Easy cleaning in seconds with water and No-Toil Cleaner. Waterproof, will not remove from filter with water alone.