Frequently asked questions about sinks and mixer taps

Questions about Silgranit sinks:

What is Silgranit made of?

Our granite sinks consist of Silgranit, a composite material made of up to 80 % quartz sand, the strongest component of granite. This is apparent not only to the eye, but also to the touch. Our Silgranit sinks have a lovely stone-like feel and are extremely easy to clean. What’s more, the material is highly resistant. You want to have free rein in your kitchen, whether you're cooking with tomatoes, strawberries, lemon juice or beetroot. Your sink is impervious to whatever ends up in it, and simply will not allow any discolouration. Only if limescale builds up on the surface of your sink you’ll need to remove it to avoid dirt accumulation. This makes your Silgranit sink an optimal synthesis of functionality and visual appeal

Is Silgranit heat-resistant?

Sometimes, things can really heat up in your kitchen. Silgranit can deal with the usual temperatures reached on pots, pans and baking trays when preparing food. Pots filled with boiling water, baking trays coming directly out of the oven and the like can be placed directly on the sink. Silgranit material is heat-resistant according to DIN standard 13310. The DIN standard is a uniform type of testing especially designed to check whether a product can withstand the usual chores in and around a kitchen sink.

Tip: If you have an overheated pan or tray, we recommend using our top-rails or a heat pad or trivet to protect the surface of your sink and worktop from the effects of extreme heat and differences in temperature.

How resistant is Silgranit?

Silgranit consists of 80 % quartz sand, the strongest component of granite. In short: your sink is extremely resistant. As such, you won’t need to worry about putting pots, pans and plates down wherever you fancy in your sink. You can also splash red wine, orange juice, hot coffee or beetroot juice around with abandon. Your Silgranit sink won’t mind one bit.

Is Silgranit acid-resistant?

Yes, Silgranit is resistant to food acids. Acid-based foods like lemons and oranges can be directly prepared on the sink surface. Even vinegar or acid-based cleaning products will not harm the sink surface (i.e. citric acid, acetic acid).

Remember: chloride acids or any other industrial aggressive acids might hurt your Silgranit sink and many other kitchen surface like granite, wood, paint, glass, … so please avoid using them in the kitchen.

Does Silgranit present any risk if it comes into contact with food?

No, Silgranit has been developed to come into contact with food and food acids. Hence there is no risk. Food acids won’t harm the sink material. Silgranit has a closed surface that blocks all common household acids. The material remains as it is. Nothing gets in and nothing comes out.

And a Silgranit sink is safe for food, so no sink substances are transferred to food placed on the sink. The food won’t take on any other odour or flavor and can therefore be prepared on the sink safely.

How do you clean Silgranit surfaces?

Cutting up beetroot, chopping onions or peeling apples: things sometimes go astray when you're performing kitchen tasks. But your Silgranit sink is perfectly able to cope. Its secret is its fine-pored, unbroken surface. Nothing is easier than to keep your SILGRANIT sink looking brand new every day, if you follow three simple steps of cleaning.

1. Quick daily cleaning: a quick daily routine to keep your sink looking good. Simple clean it with dish soap and a soft sponge, rinse it and dry it with a microfiber cloth.

2. Easy regular clean-up: limescale is the typical challenge for a sink. With this easy clean-up you can keep weekly your Silgranit sink limescale-free.

3. Deep cleaning: once a year we recommend after the limescale removal to fill the bowl with hot water and put some liquid or gel laundry soap. Leave it overnight. Then rinse it and dry it with a microfiber cloth. It is easy to keep you Silgranit sink pristine.

Can Silgranit granite sinks change colour over time?

Fresh fruit, vegetables and years of bright sunshine provide the surfaces of your sink with plenty of challenges as time goes on. But they remain completely indifferent. After all, our Silgranit sinks are solid as a rock. The material will not discolour or fade under normal use, and with a little care.

Is Silgranit hygienic?

Yes, Silgranit comes with the built-in patented protective formula 'Hygiene+Plus' with antibacterial properties.

What is Hygiene+Plus?

SILGRANIT is made with a patented protective formula that makes its surface non-porous and thus water-repellent, dirt-repellent and easy to clean. As a result, Silgranit surface has a shield effect against bacterial growth. This is the Hygiene+Plus protection. Tests* confirm that this built-in hygiene protection reduces the growth of relevant kitchen bacteria by an average of 98%.

* Tests carried out with bacterial stems ATCC 8739 and ATCC 6538 by an independent laboratory on behalf of BLANCO, 2011.

Do I need to take special care of a Silgranit sink if I use a hot mixer tap with boiling water?

Silgranit is ready to work with a hot mixer tap. Silgranit isn’t fazed by high temperatures, so boiling water won’t be a problem. A hot mixer tap like our TAMPERA delivers water at 100°C directly out of the spout, ready to make tea or cook food. Using it correctly is important to avoid injuries or putting an excessive burden on the sink.

Here our experienced tips:

• Always place a pot or cup below the tap before activating the boiling water and turn it off in good time to avoid spills.

• Be sure to keep your hands away from the running boiling water.

• Remember that the spout might be very hot after running boiling water, so avoid touching it or run some cold water before touching it. This might be very important if you have kids at home.

• Move the spout of the tap to different positions to ensure that the boiling water doesn’t hit always the same spot on the sink or place a cloth on the bottom to avoid subjecting one point of the sink surface to too much boiling water.

How do I remove metal abrasion (e.g. from pots) on the Silgranit sink?

Robust and colorfast: these properties define your Silgranit sink. This makes any small dark streak that appears on your surfaces all the more noticeable. The streaks were most likely caused by metal abrasion. However, there is no need to panic: You can remove such abrasion marks in one step. After all, your sink is not only durable, but also extremely easy to clean. All you need is a non-scratch sponge (we recommend Spontex Polish, but if you don't have it, a soft sponge will do), water, cooking oil (such as sunflower or canola), and a microfiber cloth.


  • Wet the sponge completely with water.
  • Apply oil to the soft side of the damp sponge
  • Remove the dark metal traces by making circular movements with the sponge.
  • Remove the water-oil mixture thoroughly with warm water and dry with a microfiber cloth.
How do I remove limescale?

Depending on where you live and the water pipes, limescale can be quite stubborn. The unsightly water spots thus quickly become a minor blemish on your shining piece. How good that it is no trick to clean your Silgranit kitchen sink. Use citric acid, vinegar essence or our professional BLANCO DailyClean+. Apply the solution to the stains in the sink and let it soak for 5 minutes. Then rinse the sink generously, clean with a sponge and finally wipe dry.

How do I clean my strainer basket?

The strainer basket is the secret hero in your sink. That's because: it prevents your sink from clogging up, ensuring proper functionality. Over time, however, the strainer basket accumulates some dirt. Every now and then, you should therefore treat it to some care. You don't even have to buy a special cleaner for this.

Our trick: Put a level teaspoon of a powdered dishwasher detergent on the closed strainer basket. Then pour about 250 ml of boiling water over it and let the solution soak in. Then brush and scrub (e.g. with a dish brush) until the strainer insert and drain cup shine again. Finally, open the strainer basket and remove the strainer insert. Now you have room to clean the perforations in the drain cup. When these are also sparkling clean again, reinsert the strainer insert and rinse with clean water.

How do I remove stains from dark sinks?

Milky stains quickly stand out on your dark, chic sink. Limescale deposits are to blame, and they can vary in severity depending on where you live and the plumbing. These stains also like to pick up debris like coffee and tea, causing discoloration. However, this is all less bad than it sounds. If limescale or stubborn discoloration is visible, use BLANCO DailyClean+ or acid-based cleaners (as concentrated citric acid or acetic acid) to remove the limescale. Stubborn discolorations are stains fixed to lime; by removing the lime, the discoloration also disappears.

To do this, spray the sink sparingly with BLANCO DailyClean+ or an acid-based cleaner and let it sit for five minutes. Then clean your sink with a sponge, rinse it with water and rub the surface dry with a microfiber cloth

Note: Avoid aggressive cleaners, i.e. Strongly caustic or solvent-based cleaners, as they can attack even tough, resistant granite surfaces.

Questions about stainless steel sinks

Can stainless steel sinks rust?

Stainless steel stays just as it is: resistant and rustproof. This is due to its passive coating, which is constantly regenerating itself. You should clean your stainless steel sink thoroughly in order to ensure that it stays shining for years to come. It is particularly important to remove all dirt and limescale deposits. However, your sink will not respond well to cleaning agents containing chlorine or hydrochloric acid. Strong sodium chloride solutions that take too long to work are also a no-go.

But what if you’ve spotted a couple of tiny reddish-orange marks on your stainless steel sink? If stainless steel comes into contact with rusty objects, such as cheap, unprotected steel, the rust can transfer onto your sink. This is nothing to worry about. You can wipe the rust away in one swipe using a damp sponge and a special stainless steel cleaning agent, and your sink will be spotlessly clean once again.

What causes small marks on the surface of a stainless steel sink?

Even showpieces like our stainless steel sinks sometimes get little marks on their surface. This is usually due to limescale deposits caused by water. These limescale deposits like to gather dirt particles, so you’ll notice small marks on your otherwise sparkling sink. Another origin is small iron and rust particles from the water pipes. These appear to leave traces of rust on your stainless steel sink.

However, you can get all this under control in no time. Impurities and traces of limescale can be removed in a trice with a damp cloth. If you’re struggling to remove any stubborn limescale, it’s time to try a special cleaning agent. Once that’s done, your stainless steel sink will look the way you remember once again: sparkling clean.

How can I prevent small marks from forming in my stainless steel sink?

Such radiant shine requires a little care. It doesn’t take much effort, but it needs to be done frequently. So if you want to avoid little marks on your stainless steel sink, rub it dry after each use. You don’t need to scrub it vigorously. After rinsing, simply wipe it with a soft cloth and a mild cleaner, then dry it – all done!

If you do spot an unwanted mark, use a descaling cleaning agent specially designed for stainless steel. Together with a suitable stainless steel cleaning sponge, the surface will be so spotlessly clean that you’ll wonder where those marks went so quickly.

Why is my new stainless steel sink showing scratch marks after only a few weeks?

Brand new but a few little scratches already: your stainless steel sink will be a little susceptible to this at first. However, there’s no need to worry. This is completely normal, even with our top quality stainless steel. Just wait and see: after a few days, many of the little scratches will appear to have vanished again. What’s happened? The scratches haven’t vanished into thin air; instead, they close over slowly, thanks to the effect of oxygen. This is constantly renewing the passive coating. As such, the stainless steel sink in your kitchen heals itself.

Taking good care of your sink will start to pay off within just a few weeks, so use care products and a sponge on it regularly. The more attention you give to your sink, the more scratch-resistant it will become.

How can I clean my basket strainer?

The basket strainer is the secret hero in your sink. After all, it prevents your sink from getting clogged up, thus ensuring perfect functionality. Over time, however, the basket strainer will collect some dirt, so you should give it a clean every now and then. You don’t even have to buy a special cleaner for that purpose.

Here’s our trick: put a level teaspoon of powdered dishwashing detergent onto the closed basket strainer. Pour approx. 250 ml boiling water over it and leave the solution to work. Now brush and scrub it (e.g. with a dishwashing brush) until the basket strainer and drain cup are shining once again. Finally, open up the basket strainer and take out the basket insert. Now you have room to clean the hole opening in the drain cup. Once this is squeaky clean too, reinsert the basket insert and rinse it with clean water.

Questions about ceramic sinks

What makes a ceramic sink special?

They are the ultimate synthesis of nature and design, as we make our ceramic sinks from natural raw materials. This means that every sink is a unique piece – including yours. This is apparent from the look and feel every time you come into contact with it. Delicate forms, tasteful accents and full-bodied colours charm not only the eye, but also bring magic to the heart of your kitchen.

Above all, this is down to the expertise and care taken by our employees. They always create sinks that meet the highest standards, with patience and precision. The natural character of ceramic sinks gives them certain tolerances that we observe and check meticulously.

How robust is a ceramic sink?

Cutting, chopping and heat: things can really hot up in your kitchen. And that’s precisely when your ceramic sink shows just what it can do. Its high-quality workmanship allows it to rise to any challenge, thanks to its hard and robust surface, which makes your sink scratch- and cut-resistant. What’s more, it is shock-resistant.

However, you shouldn’t take that as an invitation to treat it roughly. Exceptionally large and heavy objects should not be dropped onto its surface from a height. This would leave a mark on even this robust sink.

Are ceramic sinks easy to clean?

When vegetables, meat and fruit have all done their worst on the ceramic sink, you’d expect to be faced with something of a disaster. But you don’t need to worry about all that with your ceramic sink. The smooth and completely unbroken surface ensures that no dirt can settle on it. What’s more, any soiling that is visible after long cooking sessions is easy to tackle. Just get a soft sponge, a little washing-up liquid and warm water, and wipe it away. A microfibre cloth is best for rubbing it dry. However, steer clear of scouring agents, steel brushes and aggressive mixer tap cleaners containing chlorine. Your ceramic sink won’t like these at all.

How should I clean my ceramic sink?

If time-consuming cleaning marathons really aren’t your thing, rest easy: your ceramic sink is very low-maintenance. Just putting some warm water and washing-up liquid on a soft sponge and cleaning your kitchen sink with it every day will do the trick. Limescale is best avoided by rubbing your sink dry with a microfibre cloth afterwards.

If you find stubborn dirt on your otherwise spotlessly clean sink, it’s best to opt for a professional cleaning agent. BLANCO PuraPlus Liquid goes a good job of pre-cleaning worktops that require extra effort. This cleaner removes limescale deposits and metal abrasion, without being too taxing. Fast and straightforward In order to ensure that water continues to roll off your sink, it’s worth using a care product like BLANCO CeraCare, which both cleans and nourishes the surface. This will re-seal the surface of your sink. Avoid scouring agents, aggressive drain cleaners and scratchy brushes or steel sponges. These will damage the pristine surfaces. What’s more, they could cause the sink to lose its lovely shine.

Can the colours of a ceramic sink change over time?

Our ceramic sinks are non-fade. This means that you can install your sink in a bright room or in front of a window. Direct sunlight doesn’t pose any problem, so the colour of your sink will stay just as it was when you got it, for years to come. By the same token, standard household use of your sink will not alter its colour.

If your sink sees a lot of use, light limescale deposits may form over time. When combined with foodstuffs like coffee or red wine, this can cause slight discolouration. But there’s no need to panic: you can address the problem in a matter of minutes. In this case, use vinegar concentrate or a professional biological cleaner such as our BLANCO Antikalk. Soon you’ll see that you were worrying about nothing.

How can I clean my basket strainer?

The basket strainer is the secret hero in your sink. After all, it prevents your sink from getting clogged up, thus ensuring perfect functionality. Over time, however, the basket strainer will collect some dirt, so you should give it a clean every now and then. You don’t even have to buy a special cleaner for that purpose.

Here’s our trick: put a level teaspoon of powdered dishwashing detergent onto the closed basket strainer. Pour approx. 250 ml boiling water over it and leave the solution to work. Now brush and scrub it (e.g. with a dishwashing brush) until the basket strainer and drain cup are shining once again. Finally, open up the basket strainer and take out the basket insert. Now you have room to clean the hole opening in the drain cup. Once this is squeaky clean too, reinsert the basket insert and rinse it with clean water.

What is the easiest way of removing stains from dark sinks?

Milky patches can soon show up on your stylish dark sink. These are caused by limescale deposits, which can vary hugely from place to place, and depending on the state of your water pipes. Such stains also pick up deposits from substances like tea or coffee, and are thus responsible for discolouration. But all this isn’t as bad as it sounds. Luckily, BLANCO Antikalk, a little vinegar-based cleaner or diluted citric acid and hot water can come to your rescue. The limescale will dissolve if you clean your kitchen sink thoroughly with these substances.

If you don’t want to constantly have to contend with unsightly marks, be sure to dry your sink off with a microfibre cloth after every use. Doing this will prevent the limescale from occurring in the first place.

Questions about mixer taps

How can I clean the mixer taps in my kitchen?

Generally speaking, our mixer taps are easy-care and hygienic. This is thanks to their smooth surface, which allows hardly any dirt to settle on it. However, mixer taps do benefit from regularly cleaning. It doesn’t take much effort, but it needs to be done frequently. Take a mild cleaning agent and go over the mixer taps a few times with the soft side of a sponge. Now rub them dry with a microfibre cloth, and you’ll see that your mixer taps are back to being a stand-out feature of your kitchen once again, in just a few simple steps.

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