Permatex aviation form-a-gasket #3 sealant is a slow-drying, non-hardening gasket sealant/dressing/coating thin brush top liquid dressing or sealer for close-fitting parts. Suitable for continuous temperatures to 400 degrees Fahrenheit. Resistant to antifreeze, aviation fuels, high-detergent oils, grease and lubricants. Conforms to MIL-S-45180 D, Type III. Approved for avaition and automobile uses. 4 oz can.