Leak Sealer
Leak Sealer - Image 2

Leak Sealer

 
Rated 4.89 out of 5 based on 101 customer ratings
 (101)

$49,90

- +
Visa, Mastercard, Maestro, American Express, CB, Apple Pay, Google Pay

   Locates and seals all leaks.

   The only non-toxic and non-irritant leak sealer.

   Easy to apply.

   Money Back Guarantee.

   Circulates in the system flow and will not cause blockages within the system.

   Compatible with other No Leaky products.

   Readily dispersible.

   Suitable for all metals including aluminium, steel, copper, etc.

   This product seals leaks or weeping joints on all types of indirect central heating systems.

Quantity for your heating system:

Radiator panels Quantity
Up to 10 radiator panels
35 ounces (1 liter)
Between 10 and 20 radiator panels
70 ounces (2 liters)
Between 20 and 30 radiator panels
105 ounces (3 liters)
Greater than 30 radiator panels
140 ounces (4 liters)
Weight N/A
SKU NLLEAKSEALER1L, NLLEAKSEALER5L, NLLEAKSEALER25L
GTIN 5056773800830, 5056773800847, 5056773800854

101 reviews for Leak Sealer

Customer Images

Image #1 from Scannell H.
Image #1 from Jean Pierre N.
Image #1 from Donato R.
Image #1 from Frank D.
Image #1 from Jose D.
Image #1 from Jonas W.
Image #1 from Giovanni T.
Image #1 from Lorenzo R.
Image #1 from Marco R.
Image #1 from Domenico J.
Image #1 from Scannell H.

Scannell H.

Great product, So far, no leaks. that's what i expected. Thanks a lot for the product.

Image #1 from Jean Pierre N.

Jean Pierre N.

Colmatage parfait de ma chaudiere plus aucun probleme apres l'application de no leaky

Image #1 from Donato R.

Donato R.

Adatto per le funzioni per le quali è anche descritto,

Image #1 from Frank D.

Frank D.

Pretty good one! I recommend this guys,

Image #1 from Jose D.

Jose D.

todo perfecto y rapido

Image #1 from Jonas W.

Jonas W.

Alles gut...Bin zufrieden

Image #1 from Giovanni T.

Giovanni T.

Ogni 2 gg la mia caldaia andava in blocco per mancanza di pressione, ho chiamato tecnico e idraulico, nessuna perdita visibile, nessuna macchia, niente di niente. contatto l'assistenza il quale mi rispondono immediatamente e in modo gentilissimo su tutte le mie domande e dubbi e soprattutto garantiscono su eventuali danni a impianto e caldaia ripeto tutto nuovo. Risultato: dopo 1settimane la pressione è stabile e funziona tutto benissimo, Grazie Noleaky,

Image #1 from Lorenzo R.

Lorenzo R.

Ebbene, problema risolto, con una confezione da 1 litro, problema risolto.

Image #1 from Marco R.

Marco R.

dopo decine di verifiche da parte dell'idraulico senza trovare perdite nonostante che rifornissi la caldaia anche due volte al giorno ho tentato come ultima soluzione questo prodotto. Esperimento perfettamente riuscito. E' una settimana che non riempio il circuito e la caldaia è perfetta

Image #1 from Domenico J.

Domenico J.

Ha davvero funzionato! Nel mio piccolo impianto c'era qualche perdita, ogni settimana ero costretto a ricaricare il circuito, dopo aver messo in circolo questo prodotto sono passati 1 mesi e la pressione è costante.

Image #1 from Scannell H.
Image #1 from Jean Pierre N.
Image #1 from Donato R.
Image #1 from Frank D.
Image #1 from Jose D.
Image #1 from Jonas W.
Image #1 from Giovanni T.
Image #1 from Lorenzo R.
Image #1 from Marco R.
Image #1 from Domenico J.
1-30 of 101 reviews
  1. Lucia G.
    Reviewer

    Dieses Produkt ist sehr empfehlenswert, um Lecks in der Zentralheizung abzudichten.

  2. Edwin B.
    Reviewer

    My boiler had been oozing for months, but this magic product solves everything! Easy to use, recommended to all heating galley dwellers.

  3. Adrianna D.
    Reviewer

    My husband used a top tip for the leaks in our boiler. It works like a charm, no need for a plumber!

  4. Scannell H.
    Reviewer

    Great product, So far, no leaks. that’s what i expected. Thanks a lot for the product.

    Image #1 from Scannell H.
  5. Kevin L.
    Reviewer

    Finally, an acid-free sealant that repaired our boiler without causing any issues. Kudos for this innovation!

  6. Eberhard C.
    Reviewer

    Wir haben das Produkt risikofrei getestet, und es hat unsere Erwartungen übertroffen.

  7. Bruno K.
    Reviewer

    Até o alumínio está coberto! Nossa caldeira possui componentes de alumínio, e este vedante tem feito maravilhas. Altamente recomendado para todos os tipos de metais.

  8. Lilian P.
    Reviewer

    Livraison rapide, produit impressionnant ! Colmaté toutes les fuites, et notre chaudière fonctionne comme neuve. Satisfait à 100%.

  9. Fiorenzo T.
    Reviewer

    La nostra caldaia in lega funziona alla perfezione grazie a questo tappo. Grazie!

  10. Fernando C.
    Reviewer

    No solo selló las filtraciones, sino también las juntas de sellado defectuosas. Una solución completa para nuestro sistema de calefacción.

  11. Honoré M.
    Reviewer

    Un véritable sauveur ! Mon chauffage fonctionne comme neuf après l’application de ce colmatant. Adieu les fuites indésirables !

  12. Blaze P.
    Reviewer

    Even for novices like me, the application was a piece of cake. Successful sealing, boiler saved!

  13. Aldert D.
    Reviewer

    Onze centrale verwarming werkt op een indirecte manier, maar dit product heeft al onze lekproblemen opgelost. Geweldig!

  14. Stefan Z.
    Reviewer

    Unübertroffen in Bezug auf Leistung! Ich hatte Zweifel, aber dieses Produkt hat bewiesen, dass es der beste Abdichtung auf dem Markt ist.

  15. Rubén S.
    Reviewer

    Ele resolveu os meus problemas de vazamentos em um piscar de olhos. Estou impressionado com a sua eficácia e facilidade de uso.

  16. Ken U.
    Reviewer

    Avant, notre chaudière fuyait constamment, mais ce produit de colmatage a résolu le problème rapidement. Une efficacité exceptionnelle !

  17. Cevenini L.
    Reviewer

    Contrariamente ad altri tappi, questo non ha causato problemi aggiuntivi. La nostra caldaia funziona senza intoppi dall’applicazione.

  18. Nicolaas K.
    Reviewer

    Geen behoefte aan speciale gereedschappen, de toepassing was eenvoudig en het resultaat is een lekvrije ketel. Wat wil je nog meer?

  19. Jimmy T.
    Reviewer

    99.9% success rate confirmed! This product saved our boiler with incredible efficiency. I highly recommend it.

  20. Gustav I.
    Reviewer

    ¡Adiós a las preocupaciones por las fugas! Este producto es un verdadero salvador para los propietarios de calderas. Resultados rápidos e impresionantes.

  21. Diogo A.
    Reviewer

    Suporte ao cliente excepcional! Eles foram úteis em cada etapa, desde a escolha do produto até sua aplicação.

  22. Abhijeet T.
    Reviewer

    Een zuurvrije dichtingsvloeistof die zijn beloften nakomt! Mijn ketel lekte en nu lijkt het alsof het probleem nooit heeft bestaan.

  23. Santos A.
    Reviewer

    Nenhum outro produto se compara a este vedante. Os meus vazamentos estão consertados, e a minha caldeira está funcionando melhor do que nunca.

  24. Augustyn S.
    Reviewer

    Deze lekstopvloeistof heeft me behoed voor dure reparaties. Mijn verwarming is nu betrouwbaar dankzij dit wondermiddel.

  25. Maximiliano X.
    Reviewer

    Mi caldera funciona como si fuera nueva después de aplicar este sellador.

  26. Gerhard J.
    Reviewer

    Eine schnelle und effektive Lösung für undichte Stellen an meiner Heizung.

  27. Costantino Y.
    Reviewer

    La colmatura ha salvato la mia caldaia da una morte certa. Un’applicazione semplice, risultati impressionanti.

  28. Tiberio P.
    Reviewer

    Raccomando vivamente questo prodotto. I risultati parlano da soli: perdite riparate, caldaia in perfette condizioni di funzionamento.

  29. Patrice I.
    Reviewer

    Ce produit incroyable a résolu mes problèmes de fuites sans endommager la chaudière. Satisfaction garantie à 100%.

  30. Clark L.
    Reviewer

    Effective and safe! I’ve tried other products, but this one is the only one that repaired leaks without causing additional problems.

Add a review
Currently, we are not accepting new reviews
How do I place an order?

Placing an order on our website is quick and easy. Simply browse our catalog, choose the products you like, and click “Add to cart.” Once you’ve selected all your items, go to your cart and click “Checkout.” Follow the steps on the screen to enter your delivery information, choose your payment method, and confirm your purchase. You will receive an order confirmation by email within a few minutes, along with all the relevant details and a tracking link once your order ships.

Absolutely. We take the security of your personal and financial information very seriously. All payments are processed through a trusted and industry-compliant payment system that adheres to the PCI DSS (Payment Card Industry Data Security Standard). Our website is also protected by a secure SSL certificate, which encrypts all the information you submit, ensuring it cannot be intercepted or misused. You can shop with complete confidence knowing that your transactions are protected at every step.

We accept most major credit and debit cards, and in many countries, we also support local payment methods such as digital wallets or regional options, depending on your location. If you wish to pay via bank transfer, we can accommodate that as well — just contact us beforehand so we can guide you through the process. Please note that bank transfers may take longer to verify and process, which can delay the shipment of your order.

Shipping costs depend on the destination address and the total weight of your order. These costs are calculated automatically at checkout once you’ve entered your delivery address. You will see the final shipping fee before confirming your payment. This ensures that you know exactly what you’re paying, with no surprises. In some cases, free shipping may be offered based on promotions or order value — these offers will be clearly indicated when available.

Yes, we offer international shipping to most countries worldwide, excluding only those under international trade sanctions, such as North Korea, Iran, Syria, Cuba, Russia, Belarus, and the Crimea region.

We currently ship to the following countries:

Africa:
Algeria, Angola, Benin, Botswana, Burkina Faso, Burundi, Cabo Verde, Cameroon, Central African Republic, Chad, Comoros, Republic of the Congo, Democratic Republic of the Congo, Côte d’Ivoire, Djibouti, Egypt, Equatorial Guinea, Eswatini, Ethiopia, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Kenya, Lesotho, Liberia, Madagascar, Malawi, Mali, Mauritania, Mauritius, Mayotte, Morocco, Mozambique, Namibia, Niger, Nigeria, Réunion, Rwanda, São Tomé and Príncipe, Saint Helena, Senegal, Seychelles, Sierra Leone, Somalia, South Africa, South Sudan, Sudan, Tanzania, Togo, Tunisia, Uganda, Zambia, Zimbabwe

Asia:
Afghanistan, Armenia, Azerbaijan, Bahrain, Bangladesh, Bhutan, Brunei, Cambodia, China, Georgia, India, Indonesia, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Laos, Lebanon, Malaysia, Maldives, Mongolia, Myanmar (Burma), Nepal, Oman, Pakistan, Palestine, Philippines, Qatar, Saudi Arabia, Singapore, South Korea, Sri Lanka, Taiwan, Tajikistan, Thailand, Timor-Leste, Turkey, Turkmenistan, United Arab Emirates, Uzbekistan, Vietnam, Yemen, Christmas Island, Cocos (Keeling) Islands, British Indian Ocean Territory, Macau, Hong Kong

Europe:
Albania, Andorra, Austria, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Faroe Islands, Finland, France, Germany, Gibraltar, Greece, Guernsey, Hungary, Iceland, Ireland, Isle of Man, Italy, Jersey, Kosovo, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Montenegro, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, San Marino, Serbia, Slovakia, Slovenia, Spain, Svalbard and Jan Mayen, Sweden, Switzerland, Ukraine, United Kingdom

North America:
Antigua and Barbuda, Bahamas, Barbados, Belize, Bermuda, Canada, Costa Rica, Dominica, Dominican Republic, El Salvador, Greenland, Grenada, Guadeloupe, Guatemala, Haiti, Honduras, Jamaica, Martinique, Mexico, Nicaragua, Panama, Saint Barthélemy, Saint Kitts and Nevis, Saint Lucia, Saint Martin, Saint Pierre and Miquelon, Saint Vincent and the Grenadines, Trinidad and Tobago, United States, Puerto Rico, Guam, U.S. Virgin Islands, American Samoa, Northern Mariana Islands, Montserrat, Anguilla, Turks and Caicos Islands, Cayman Islands, British Virgin Islands, Aruba, Curaçao, Bonaire, Sint Eustatius, Saba, Sint Maarten

South America:
Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Falkland Islands, French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela, South Georgia and the South Sandwich Islands

Oceania:
Australia, Fiji, French Polynesia, Kiribati, Marshall Islands, Micronesia, Nauru, New Caledonia, New Zealand, Niue, Norfolk Island, Palau, Papua New Guinea, Pitcairn Islands, Samoa, Solomon Islands, Tokelau, Tonga, Tuvalu, Vanuatu, Wallis and Futuna

We keep our website up to date in real time. If you see a product available for purchase on the site, it means it is in stock and ready to ship. In the rare event that there is an inventory error or if a product becomes unavailable after you place your order, we will contact you immediately with options, such as a refund or replacement. You can shop with confidence knowing that we only display items that are currently available.

After the shipment of your order, you will receive a shipping confirmation email. In this email, you will find your tracking number to locate your order.

Our customer service is available 24 hours a day, 7 days a week via live chat. Whether you have a question about your order, need help with a product, or run into a technical issue, our team is here to assist you in real time. We aim to respond as quickly as possible and always strive to provide friendly and effective support.

We strive to respond to your questions as quickly as possible. During our business hours, you will receive a response within 30 minutes.

We do our best to ensure that every order is shipped and delivered on time. However, delays may occasionally occur due to external factors like weather, carrier issues, or customs for international shipments. If your package is taking longer than expected, we recommend checking the tracking link you received by email first, as it often provides real-time updates. If the issue persists or there’s no new information, don’t hesitate to contact our support team, and we’ll be happy to assist you in locating your order and resolving any issues.

Yes, we regularly offer special promotions on our products. Make sure to subscribe to our newsletter to receive the latest updates on our exclusive offers.

If you have a promotional code, you can use it during checkout. After entering your shipping details, you’ll see a field labeled “Promo code” or “Discount code.” Simply enter your code there and click “Apply.” If the code is valid, your discount will be reflected immediately in your order total. Please ensure the code is still active and check any terms and conditions related to its use.

To stay updated on news, promotions, and exclusive events, follow us on our social media. You will find all the important information about our online store.

We want you to be fully satisfied with your purchases. If you encounter an issue with a product, please contact our customer service as soon as possible to discuss return or refund options.

Sometimes, your tracking number may take a few days to become active. Please try again later, but if the issue persists, contact us.

The invoice for your order is always sent with your package. If you have lost it, you can also send us an email to receive a copy.

You can create an account either before placing an order or during the checkout process. When you’re about to complete your purchase, simply select the option to “Create an account.” You’ll be asked to provide a few basic details such as your name, email address, and a password. Creating an account allows you to track your orders more easily, save your delivery information for future purchases, and access special offers reserved for our registered customers.

Yes, of course. We understand that not everyone wants to register, so we offer the possibility to checkout as a guest. You’ll still need to enter your shipping and payment details, but you won’t be required to create a password or set up a profile. Please note that if you don’t create an account, you won’t have access to order history or tracking through a personal dashboard — however, you’ll still receive all updates via email.

Send us an email to [email protected], and we will respond as soon as possible.

You may also like

Shopping Cart

⚠️



Beware of counterfeit products!

No Leaky sells its products exclusively on its official website, noleaky.com, and has no resellers. All products available on other online platforms, such as eBay, are counterfeit. All customers who purchased these counterfeit products have reported irreversible engine failures in their vehicles. We disclaim all responsibility for the use of counterfeit products, and any product purchased outside of the noleaky.com website is excluded from our warranty.