Prepares surface, accelerates curing and promotes maximum performance of Park Tool TLR-1 and TLR-2 Threadlockers as well as RC-1 Retaining Compound Must be used on all components, fasteners and carbon fiber surfaces in conjunction with threadlockers and retaining compounds that contact carbon fiber, failure to do so can result in permanent bonding Adhesive Primer 30ml AP-1UPC/EAN/GTIN: 763477000088