Loctite 7649 Primer N decreases the set-up time of Loctite brand threadlockers and increases breakaway torque on most fastener surfaces. Allows application of threadlockers in cold weather. Contains no ozone-depleting compounds. Loctite 7649 is used where increased cure speed of Loctite anaerobic products is required. It is especially recommended for applications with passive metals or inert surfaces and with large bond gaps. Loctite 7649 is particularly recommended when prevailing temperature is low (<15 0C). 1.75 fluid ounce bottle.