⚡ ARMACK CWK flux for soldering copper, 250 g

ARMACK AMASAN CWK 250 g is a professional liquid flux, also known as soldering water, intended for soft soldering copper and copper alloys. It is ideal for roofing, sheet-metal, installation and repair work.

The preparation improves wetting of the surfaces to be joined and solder flow, making it easier to create even, durable joints. Unlike aggressive soldering acids, CWK flux was developed for delicate copper surfaces – it leaves no stains and does not damage copper, helping to preserve its natural resistance to corrosion.

✅ Key benefits of ARMACK CWK flux

• Designed specifically for copper and copper alloys.
• Facilitates solder flow and improves surface wetting.
• Leaves no stains on copper.
• Does not damage copper surfaces when used correctly.
• Helps preserve copper’s resistance to corrosion.
• The liquid consistency enables easy and precise application.
• Suitable for roofing and sheet-metal work.
• Intended for use with lead-free solder Sn97Cu3 (LC97).
• The product has a PZH certificate.

✅ Ideal for soldering copper components

CWK flux was developed for soft soldering copper and its alloys. It facilitates surface preparation and the correct flow of tin at the joint.

It is particularly suitable where joint appearance and preservation of the copper surface properties are important.

✅ Applications

ARMACK AMASAN CWK can be used, among other applications, for:

• soldering copper gutters,
• soldering copper roof coverings,
• forming parapet flashings,
• soldering drain baskets,
• joining copper and copper-alloy components,
• roofing work,
• sheet-metal work,
• repairing and renovating copper components.

✅ Recommended solder Sn97Cu3

The manufacturer recommends using CWK flux together with Sn97Cu3 (LC97) soft solder. This is a lead-free solder intended for making durable joints in copper and copper-alloy components.

Choosing the appropriate solder and preparing the surfaces correctly have a direct impact on the durability and quality of the joint.

✅ How to use CWK flux

Before soldering, the surface must be thoroughly cleaned of oil, dust and other contaminants.

Apply the flux in a thin, even layer using a brush for soldering preparations. The recommended overlap width, i.e. the solder joint width, is approximately 10–15 mm.

Then heat the component appropriately and feed in the solder. After soldering, remove flux residues with a damp cloth.

✅ For roofing soldering irons

Depending on the work being carried out, CWK can be used for soldering with soldering irons and roofing soldering irons with a copper tip, both hammer and pointed types.

Keeping the tip in good condition improves heat transfer and helps limit the formation of unwanted inclusions in the joint.

✅ Technical data

• Manufacturer: ARMACK
• Series: AMASAN
• Name: CWK
• Type: flux / soldering water
• Intended use: soft soldering
• Materials: copper and copper alloys
• Form: liquid
• Weight: 250 g
• Classification: DIN EN 29454-1 3.1.1.A (F-SW 21)
• Recommended solder: Sn97Cu3 (LC97)
• Certificate: PZH

✅ Important application information

Surfaces should be clean and degreased before soldering. After completing the work, thoroughly remove flux residues from the soldered area.

Use the preparation as intended and in accordance with the information on the label and in the safety data sheet. Keep chemical products out of the reach of children.