Urnex Dezcal Activated Descaler Powder 900g

Limescale is one of those problems that creeps up on you. It doesn't happen overnight, but mineral deposits from hard water gradually build up inside boilers, heating elements and water lines, quietly restricting flow, destabilising brew temperatures and, ultimately, degrading the taste of your coffee. If you're in the UK, where water hardness varies enormously by region, descaling isn't a nice-to-have, it's an essential part of keeping any coffee equipment in proper working order. Urnex Dezcal is the professional-grade answer, and it's what we'd reach for when it's time to tackle scale.

Dezcal's activated powder formula is specifically designed to dissolve limescale and calcium deposits from the internal components of coffee and espresso machines without damaging the metals inside. It's biodegradable and phosphate-free, which makes it a responsible choice for regular use, and the concentrated formula means a little goes a long way. Each 900g tub is mixed at a ratio of 28g per litre of warm water, giving you plenty of solution for multiple descaling cycles or component soaks from a single tub.

The versatility of Dezcal is a big part of what makes it such a useful product to have on hand. It works across espresso machines, drip brewers, kettles, pod machines and commercial boilers, covering the full range of equipment you're likely to be maintaining. Whether you're a barista keeping a commercial machine in peak condition, a service engineer descaling a removed boiler, or a home enthusiast looking after a prosumer setup, Dezcal is designed to handle the job cleanly and thoroughly. Pair it with Cafiza2 for backflushing and you've got a complete two-product cleaning routine that covers all the bases.

• Brand: Urnex
• Product: Dezcal Activated Scale Remover Powder
• SKU: URN4301
• Format: Powder
• Net weight: 900g
• Dilution ratio: 28g per 1 litre of warm water
• Application methods: In-machine descaling, component soaking, boiler soak (removed)
• Soak time: Up to 30 minutes depending on scale build-up
• Compatible equipment: Espresso machines, drip coffee brewers, kettles, pod machines, commercial boilers
• Key action: Dissolves limescale and calcium mineral deposits from internal machine components
• Formula: Biodegradable and phosphate-free
• Safe for: All machine metals
• Safety: COSHH/Safety Data Sheet available from Urnex.co.uk
• Manufacturer: Urnex Brands LLC

How is Dezcal different from Cafiza2?

These two products do different jobs. Cafiza2 is a detergent-based cleaner designed to remove coffee oils and residue from group heads, portafilters and internal machine surfaces via backflushing and soaking. Dezcal is a descaler, formulated specifically to dissolve mineral scale and limescale deposits from boilers, heating elements and water lines. For a complete cleaning routine, you ideally want both.

How often should I descale my espresso machine with Dezcal?

This depends on your local water hardness and how frequently you use your machine. As a general guide, home machines in hard water areas should be descaled every one to three months. Commercial machines vary depending on water quality and usage volume. Many modern machines have a built-in descaling indicator, and this is a useful starting point, though regular maintenance is always better than waiting for a prompt.

What is the correct dilution ratio for Dezcal?

Dissolve 28g of Dezcal powder per 1 litre of warm water, stirring thoroughly until the powder is fully dissolved before use. This ratio applies whether you're running the solution through a machine, soaking removed components, or submerging a boiler for a soak descale.

Can Dezcal be used on all espresso machines?

Dezcal is safe for use on all machine metals and is compatible with a wide range of espresso machines, coffee brewers, kettles and pod machines. Always check your machine manufacturer's instructions before descaling, as some machines have specific descaling procedures or recommended products. If in doubt, consult the manufacturer's guide first.

How long should I leave the Dezcal solution in my machine?

For in-machine descaling, the standard process involves running half the solution through, allowing it to sit for 15 to 20 minutes, then completing the cycle. For soaking removed components or boilers, leave the parts submerged for up to 30 minutes depending on the severity of the scale build-up, then rinse thoroughly with clean water.

How many rinse cycles do I need to run after descaling?

After running the Dezcal solution through your machine, flush with at least two full tanks of clean water to ensure all traces of the descaling solution are removed before you brew. Thorough rinsing is important, so don't skip this step.

Is Dezcal safe for the environment?

Yes. Dezcal is biodegradable and phosphate-free, making it a more environmentally responsible choice for regular descaling use compared to some alternative formulas. It's also non-toxic when used as directed.

Can I use Dezcal on a kettle or pod machine?

Yes, Dezcal is suitable for kettles and pod machines as well as traditional espresso equipment. Mix at the standard ratio of 28g per litre of warm water, run or soak as appropriate for the appliance, and rinse thoroughly before use.

Where can I find the Safety Data Sheet for Dezcal?

The COSHH Safety Data Sheet for Dezcal is available directly from Urnex.co.uk. This documentation is particularly important for commercial environments where COSHH compliance is required.

How does limescale actually affect my coffee?

Limescale build-up inside a machine restricts water flow and reduces the efficiency of heating elements, which means your machine struggles to reach and hold a stable brew temperature. This directly affects extraction quality and, ultimately, the taste of your coffee. Consistent descaling keeps your machine performing as it should and protects the equipment from longer-term damage caused by mineral accumulation.