Lucas Milhaupt has been a trusted partner to the HVAC/R industry for decades, providing specialized brazing alloys and expertise that ensure durable, leak-free joints in refrigeration and air conditioning equipment. Our legacy began with the invention of Sil-Fos® – a silver-copper-phosphorus brazing alloy patented in 1931 – which allows flux-free brazing of copper connections and remains a staple for HVAC/R contractors.