HIGHSIDE 30004 HIG30004 Solderlene Solderlene from Highside Chemicals is a high-quality, solder paste type, nonacid soldering flux. It features industrial-strength wetting agents to promote solder flow. Use it with low and mid-temperature soft solders. Features Soldering Paste For Use With Low Mid Temperatures Both Lead Lead-free Applications For Use On All Metals Except Aluminum Magnesium Great for all your needs Great for all your needs USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.