4.9+ Rating 
When it comes to achieving strong, leak-free joints in plumbing, using the right materials and techniques is critical — and flux is one of the most essential products in any plumber’s toolkit.
At Monsterplumb, we offer a wide range of high-quality fluxes trusted by professional plumbers across the UK. But why exactly is flux so important? Let’s break it down.
What is flux?
Flux is a chemical cleaning agent used during the soldering process. Its main job is to prepare and protect metal surfaces to ensure a clean, reliable joint when joining copper pipes and fittings.
Without flux, even the best soldering technique can fail due to oxidation and impurities on the metal surfaces.
Why is flux essential in plumbing?
✅ Prevents oxidation
When you heat copper pipes for soldering, they oxidise almost instantly. Flux helps prevent this oxidation, ensuring the solder can flow smoothly and bond effectively.
✅ Cleans the joint
Flux helps clean microscopic dirt and contaminants from the metal surfaces, which is essential for achieving a watertight seal.
✅ Improves solder flow
Flux promotes even solder distribution by helping it "wet" the surfaces properly, resulting in a strong, durable joint.
✅ Reduces risk of leaks
By ensuring a proper seal, flux greatly reduces the risk of leaks, saving you costly callbacks and repairs.
The best flux options at Monsterplumb
We stock a wide range of fluxes so you can find the perfect match for your plumbing jobs. Here are some of our best sellers:
- Fernox Powerflow Flux
A high-quality, self-cleaning flux designed for use with copper fittings and end-feed or capillary joints. Fernox Powerflow is popular for its excellent cleaning ability and reliability. - Everflux
A versatile, non-acidic flux that is easy to apply and widely trusted by professional plumbers. It’s suitable for potable water systems and known for its strong performance. - LA-CO Flux
A favourite among many installers, LA-CO flux is water-soluble and lead-free, making it an ideal choice for domestic plumbing jobs. It offers strong cleaning power and smooth solder flow. - Templer’s Telux
A high-performance flux designed for use with copper, brass, and other metals. Telux is a great choice for achieving clean, strong joints with minimal effort. - Canfield Copper-Mate This flux is ideal for copper pipe soldering and is designed to work across a wide temperature range. Copper-Mate helps ensure strong, corrosion-resistant joints every time.
Why buy your flux from Monsterplumb?
At Monsterplumb, we understand the importance of using reliable, professional-grade materials. That’s why we carefully select the fluxes we stock — so you can have peace of mind knowing you're getting the best quality at competitive prices.
Whether you're working on domestic plumbing, commercial installations, or heating systems, we’ve got the right flux for you. Plus, with our easy online ordering and fast delivery, you can get everything you need exactly when you need it.
Ready to get started?
If you want cleaner joints, stronger seals, and fewer leaks, high-quality flux is a must-have.
Explore our full range of fluxes today at www.monsterplumb.co.uk and take your plumbing jobs to the next level.
