15 mL / 0.5 FL OZ / 10-Free A barrier-like clear coat specifically made to lock in magnetic designs, and avoid the magnetic effect dispersing due to quick dry top coats. How To: After magnetizing the final coat of your magnetic polish of choice, apply a thin coat of Lock & Key and remagnetize for 60 seconds. Lock & Key will only slightly re-wet your magnetic polish, but not so much that you should see drastic movement during painting and/or remagnetizing. Once Lock & Key has dried, apply one coat of any quick dry top coat. No need to magnetize the QDTC layer; Lock & Key will keep your design safe. Please Keep In Mind: Lock & Key will not rewet the polish enough to "fix" any mistakes. This product can be used to prevent your magnetic design from changing with quick dry top coat.