We can't find products matching the selection.

What is the difference between lead and lead free solder? Lead solders are cheaper but pose a substantial health hazard. Lead free solders, meanwhile, are safer and create stronger bonds that are more vibration/thermal cycle resistant. All the solders below meet lead free and cadmium free standards that respond to growing regulation requirements around the world.

Plumbing & Structural Applications on Copper, Brass, and Stainless (Compliant with NSF/ANSI Standards) 

Plumbing application of lead free solder

Best cost, strength, and profile for most applications:  

Widest melting range for large joints:  

High tolerance to vibration, stress, and thermal cycling: 

  • KappZapp4 (Best for hand soldering)    

  • KappZapp7 (Best for speaker industry and/or high vibration) 

Capable of highest heat, affordable cost: 

Galvanized Coating Repair After Welding (Exceeds ASTM standards) 

Autobody repair of old car

Excellent barrier protection, easy application: 


Most corrosion resistant, great tensile strength 

  • KappAloy (Best for low temperature solder joints) 

Best for radiator and heat exchanger repair 

Best for dissimilar metals and high temperatures 

Durakapp#2 Grade 2 Babbitt for bearings, tinning compounds, Fluxes, and all our accessories are also lead free products!



For any questions, please fill out the form below and a Kapp representative will contact you shortly.