Solders & fluxes

Soldering is a process in which metal parts are joined with an additional material (solder) whose melting temperature is lower than the melting temperature of the metals to be joined. A solid metallurgical bond is created by the connection between the filler metal and the metals to be joined. A distinction is made between brazing, in which the melting temperature of the filler metal is below 450°C, and hard soldering, in which the melting temperature is above 45°C. Physical and chemical phenomena such as capillarity occur during brazing. Castolin Eutectic's wide range of filler alloys and fluxes offers you a solution for all brazing applications.

1020 XFC - Cadmium-free silver solder

1020 XFC - Cadmium-free silver solder

€1,215.73 €1,215.73 / kg

for iron, copper and nickel materials

Castolin 1655 Cadmium-free silver solder

Castolin 1655 Cadmium-free silver solder

€533.10

for iron, copper and nickel materials

EcoBraz 38234F High silver content brazing alloy

EcoBraz 38234F High silver content brazing alloy

€410.42

34% silver, coated, 1kg

1666 XFC brazing rods

1666 XFC Brazing rods

€550

Flexible flux-coated solder rod

EcoBraz 38240F High silver content brazing alloy

EcoBraz 38240 High silver content brazing alloy

€451.44

40% silver, coated, 1kg

Castolin Eutectic 5283 RB Brazing alloy based on copper-silver-phosphorus

5283 RB Brazing alloy based

€350

Cu-P, 15% silver, round 2.0mm

EcoBraz 38244F Silver-coated solder

EcoBraz 38244F Silver-coated solder

€455.14

44% silver, Ø 2.0mm, 1.0kg

EcoBraz 38220B Brazing flux

EcoBraz 38220B Brazing flux

€342.81

for iron and copper materials

EcoBraz 38220F Silver brazing alloy

EcoBraz 38220F Silver brazing alloy

€320.05

Silver brazing alloy for iron and cop...

EcoBraz 38255F High silver content brazing alloy

EcoBraz 38255F High silver content brazing alloy

€848.64

brazing alloy 55% silver, coated, 1kg

EcoBraz 38256F cadmium-free brazing alloy

EcoBraz 38256F Brazing alloy

€565.63

56% silver, coated, 1kg

XuperPhos 38118 BV Copper - Phosphor - Solder

XuperPhos 38118 BV Copper - Phosphor - Solder

€207.81 €207.81 / kg

Cu-P, 18% silver, 2x2mm square

EcoBraz 38230B Brazing alloy

EcoBraz 38230B Brazing alloy

€498.17

30% silver, bright, 1kg

EcoBraz 38244B Brazing alloy

EcoBraz 38244B Brazing alloy

€558.70

High silver content, cadmium-free bra...

EcoBraz 38245B Cadmium-free alloy

EcoBraz 38245B Cadmium-free alloy

€579.73

45% silver, bright, 1kg

EcoBraz 38255B Brazing alloy

EcoBraz 38255B Brazing alloy

€720.24

55% silver, bright, 1kg

Popular GreenFlux 1602 brazing flux

GreenFlux 1602 brazing flux

€85.41 €341.64 / kg

Flux without CMR substances

157 Soft solder

157 Soft solder

€421 €421 / kg

for iron and copper materials

Castolin 192 FBK Aluminum solder

Castolin 192 FBK Aluminum solder

€458.50

Flux-filled solder rod with core wire

Castolin 16 Brass solder

Castolin 16 Brass solder

€298.90 €119.56 / kg

Brass solder for steels and nickel al...

Castolin 146 Brass solder

Castolin 146 Brass solder

€417.39 €83.48 / kg

Brass solder for steels and nickel al...

Castolin 185 Brass solder

Castolin 185 Brass solder

€766.20 €153.24 / kg

Brass solder for applications

Castolin SPD 5423 Soft solder paste 0.25 kg

Castolin SPD 5423 Soft solder paste 0.25 kg

€81.81 €327.24 / kg

for copper and copper materials

157T Soft solder wire on spool

157T Soft solder wire on spool

€282.99

for iron and copper materials

1020 F Cadmium-free silver solder

1020 F Cadmium-free silver solder

€905.50 €905.50 / kg

for iron, copper and nickel materials

Solders and fluxes are important materials for a variety of industrial and electronic applications. Solder is a metal alloy used to join two metal parts. Flux is a chemical that helps clean the metal surfaces and prevents oxidation.

There are many different types of solder, each with its own unique properties. The most common type of solder is tin-lead solder, a mixture of tin and lead. Tin-lead solder is easy to work with and has a low melting point, making it suitable for a variety of applications. Other types of solder include silver solder, which is used for high-temperature applications, and copper solder, which is used for electrical applications.

There are also many different types of flux, each with their own unique properties. The most common flux is rosin, a type of organic flux made from tree resin. Rosin fluxes are easy to use and create a strong bond. Other fluxes include acid fluxes, which are made from acids, and water-soluble fluxes, which are made from water-soluble solvents.

Solders and fluxes are used in a variety of industrial and electronic applications, such as plumbing, heating and cooling, and construction
Solders and fluxes offer a number of advantages, including ease of use, low melting point, strong bond, wide range of applications

When selecting solder and flux, it is important to consider the following factors:

  • The type of metal to be joined
  • The temperature range
  • The desired properties of the joint


When using solder and flux, it is important to use the correct type of solder and flux for the application and to have a clean work surface. Follow the manufacturer's instructions carefully, wear safety goggles and gloves and dispose of solder and flux properly.