For heavier work you will not have to apply as much heat. Since all solder pastes flow at low temperature you will be able to solder delicate pieces without distortion or in the case of electronics without damaging insulation or delicate components. Solder-It Pastes produce solder joints that are 5 to 10 times stronger than conventional solder. That is 5 000 to 28 000 psi depending on the metals you are joining. PRO-70 Torch with a Catalytic (flameless) Soldering Tip a Vinyl Storage Pouch Removable Stand Full Instructions and Warranty. Silver Bearing Paste. Aluminum Paste. Copper Bearing Paste. Pot Metal Paste. One Boxed Kit.