Waterproof Sealant
Waterproof Sealant: Strong Sealing | Instant Emergency Repair
Adiseal adhesive sealant is a high-performance MS-polymer waterproof sealant adhesive, designed to bond and seal in dry, wet, and even underwater conditions. Proven strongest in independent testing with a bond strength exceeding 3123 psi, Adiseal provides a permanently flexible, 100% waterproof barrier that does not shrink or crack. Unlike traditional silicone, this solvent-free formula is UV-resistant and resists mould, making it the ideal professional solution for emergency gutter repairs, bathroom sealing, and heavy-duty construction applications.
Quick links
- Why choose Adiseal waterproof sealant?
- What is the best clear waterproof sealant?
- How To Apply A Waterproof Sealant For Best Results?
- Waterproof Sealant Applications: Wood, Metal, Plastic & More
- Jump to FAQs
Why Choose Adiseal Waterproof Sealant?
Adiseal industrial strength waterproof sealant provides a long-lasting, water-resistant seal. It excels in instantly sealing leaks in dry or even in challenging wet conditions like rain. In the demonstration video below, we sealed a large 10mm by 250mm hole in a water-filled plastic tub instantly by applying Adiseal underwater sealant, stopping the leak immediately even with water pouring through the hole.
Emergency Leak Repair: How to Stop Water Instantly
What Are The Benefits Of Adiseal Waterproof Sealant & Adhesive?
| Feature | Professional Benefit |
|---|---|
| All-Weather Use | Works in dry, wet, and even fully submerged underwater conditions. |
| High Initial Grab | Powerful suction on contact (for even more grab, use Adiseal Hi-Grab). |
| High Gap-Fill | Acts as an excellent gap filler sealant for uneven or irregular surfaces. |
| Resists Mould | Resists mould and prevents fungal and bacteria growth over time. |
| Over-Paintable | Can be painted over with most (non-oil based) paints. Mix paint into Adiseal Ultra Clear for custom colours. |
| Permanent Flexibility | Non-brittle formula remains flexible to accommodate movement. |
| 100% Waterproof | Provides a total waterproof bond and water-resistant seal. |
| UV Resistance | High resistance to UV rays, making it ideal for all outdoor applications. |
| Low Odour | Virtually odourless formula for a more pleasant application experience. |
| Safety-First Formula | Isocyanate-free and solvent-free; safe for use on sensitive materials. |
| Zero Shrinkage | Does not shrink or crack, ensuring a better, longer-lasting seal. |
| Chemical Resistance | Offers good resistance to chemicals and environmental stressors. |
| EC1 Plus Certified | Rated for very low emissions (No VOCs) for indoor air quality. |
| ISEGA Certified | Safety certification for use in food preparation areas. |
| Industrial Strength | Heavy-duty performance for both indoor and outdoor construction. |
| Primer-Free Bonding | Eliminates the need for concrete primers on clean, dust-free surfaces. |
| Zero Staining | Advanced formula will not bleed into porous stone, marble, or masonry. |
| Extreme Temperature | Remains stable and effective from -40°C to +100°C. |
| Indoor Or Outdoor Use | Provides a high quality seal or bond in interior or exterior applications. |
Best Mould Resistant Sealant: Test Results
In our testing to find the best mould resistant sealant, Adiseal emerged as the top-performing product. We conducted a controlled experiment applying various sealants into clean plastic cups, filling them with tap water, and sealing them for several days to simulate high-humidity environments.
Despite prolonged, direct exposure to water, Adiseal demonstrated the strongest resistance to mould growth, while other leading sealants showed visible fungal development. This makes Adiseal the superior choice for high-moisture areas like bathrooms, kitchens, and basements.
Where to Buy
What Is The Best Clear Waterproof Sealant?
Adiseal Ultra Clear waterproof sealant lives up to its name, staying genuinely crystal clear unlike some alternatives like silicone sealants that appear cloudy upon application. Unlike cheaper products that claim “clear” on the packaging but turn white or cloudy when in contact with water, Adiseal Ultra Clear maintains its appearance whether dry or wet, making it the superior professional choice.
In the test documented below, we demonstrate Adiseal Ultra Clear’s ability to maintain its transparent appearance even after extended submersion in water.
Adiseal Ultra Clear Has Strongest Colour Retention In Water
Colour retention test of clear waterproof sealant methodology:
We tested the clear waterproof sealant’s ability to remain clear by applying them inside new plastic cups. We then filled the cups halfway with tap water, covered them, and kept them under identical conditions for several days.
Waterproof sealant clear test results:
After several days of being submerged in the same water, Adiseal outperformed competitors, staying clear both above and below the waterline.
- Adiseal: Remained crystal clear both above and below the waterline.
- Competitors: Competitor waterproof clear sealants turned white below the waterline. One competitor sealant also turned white above the waterline.
How To Apply A Waterproof Sealant For Best Results?
How to apply a waterproof sealant.
- Clean the surface
Ensure the area is free of grease, dirt, and mould. A clean surface is vital for a permanent, long-lasting bond.
- Cut the Nozzle:
Cut the nozzle of the sealant tube at a 45-degree angle to match your desired bead size.
- Apply Sealant:
Maintain consistent pressure to apply a steady, even bead along the joint.
- Smooth the Bead:
Use a caulking tool or gloved finger to shape the sealant, ensuring full coverage and a neat finish.
- Clean Excess:
Wipe away wet excess with a damp cloth. Once cured, excess must be trimmed with a utility knife.
- Cure and Test:
Most sealants require 24 hours to cure. Note: Adiseal can be tested for leaks immediately after application, even before it has fully cured.
Pro-Tip: How to Store Opened Adiseal: To store Adiseal once opened, leave approximately 1cm of product protruding from the nozzle and store the tube upright in a cool, dry place. Because Adiseal requires moisture to cure, the exposed sealant will harden into a natural “cap.” When you’re ready to reuse it, simply pull out the cured plug or trim the nozzle.
Internal and external weatherproof sealant
Adiseal is a versatile all weather sealant ideal for both indoor and outdoor use, excelling as a weatherproof sealing solution for various applications. Its high UV resistance, flexibility, and ability to withstand high temperatures make it perfect for outdoor sealing projects. Additionally, it cures underwater, prevents mould growth, and sustains adhesion when exposed to water, making it an exceptional choice for instant sealing in rainy conditions, particularly for roofs and gutters. Whether it’s for indoor applications or exterior waterproof sealing applications, Adiseal provides a high-performance water resistant seal.
Permanent submersion
Adiseal seals instantly underwater and provides a durable bond. For applications with permanent water submersion (like swimming pools), ensure the adhesive is fully cured and protected by the tile and grout structure to achieve a long-lasting, reliable seal.
Waterproof Sealant Applications: Wood, Metal, Plastic & More
Adiseal adhesive sealant can be applied to a number of different material surfaces including wood, metal, concrete, stone, plastic, glass, ceramics, brick and many more.
Waterproof sealant for wood
Adiseal remains permanently flexible, allowing for the natural expansion and contraction of timber. This prevents the seal from tearing away from the wood fibers, ensuring a 100% watertight barrier that prevents wood rot in external joints. We demonstrated Adiseal’s exceptional waterproofing ability on wood by applying it to wood and brick surfaces in dry, damp, and wet conditions. This showcased its strong adhesion and weather resistance, depicted in the accompanying images.
Waterproof sealant for plastic
For a versatile waterproof sealant suitable for various materials, including plastic, particularly PVC, Adiseal provides a high-performance seal. It is however not recommended for use on certain plastics like polypropylene (PP), polyethylene (PE), PTFE or polyurethane (PU). These ‘low-surface-energy’ plastics require specialized primers as their chemical makeup resists standard bonding.
Non-Corrosive Waterproof Sealant for Metal and Lead Flashing
Adiseal is a versatile, non-corrosive, neutral cure waterproof sealant for metal as well as other materials. Prior to application, it’s essential to clean the metal surface thoroughly by removing any oil, grease, or rust to ensure a long-lasting seal on metal.
Waterproof sealing of electrical boxes
Adiseal is suitable for waterproofing the outside of electrical connection boxes and electrical junction boxes depending on the type of material the electrical box is made from. It can be used to seal the holes of the box and also seal the joints between the box and the lid.
To fill the box with a waterproof sealant, a suitable product needs to be used. Our IP68 rated IPGel Duo and IP67 rated IPGel Mono products are re-enterable electrical waterproof gel products that are capable of withstanding high voltage.
What Colours Is It Available In?
Adiseal adhesive and sealant is available in the following colours:
- White adhesive and white sealant
- Black adhesive and black sealant
- Grey adhesive and grey sealant
- Clear adhesive and clear sealant
- Brown adhesive and brown sealant
Adiseal can also be manufactured in any RAL colour.
Can you paint over waterproof sealant?
It is also possible to paint over Adiseal with water based paint once it has cured. It is recommended to test in a small area before painting.
Waterproof Adhesive Glue
As well as Adiseal being a great waterproof sealant, it is also an excellent waterproof adhesive glue. It will provide a strong, durable, flexible and waterproof bond on many different construction materials.
Frequently Asked Questions About Waterproof Sealant
The best waterproof sealant is Adiseal, a high-performance MS polymer independently proven to be the strongest available. In testing, it withstood over 3123 psi without the bond breaking. Unlike silicone, Adiseal is 100% waterproof, UV-resistant, and permanently flexible, making it the superior choice for emergency leak repairs, even when applied directly underwater.
Adiseal is a high-performance MS polymer sealant specifically designed for application on wet surfaces and in the rain. Unlike traditional silicone, it provides instant suction and can be applied directly underwater to stop leaks immediately, making it the ideal emergency repair solution for gutters and roofs.
Adiseal is the best external waterproof sealant due to its high UV resistance and permanent flexibility. It does not shrink or crack over time and features industry-leading mould resistance, ensuring a long-lasting, weatherproof barrier for masonry, windows, and outdoor structures even in extreme temperatures.
The lifespan of a waterproof sealant depends on factors like its quality, the environment, and how it’s applied. A high-quality sealant can last several years before needing a touch-up.
Standard sealant isn’t meant to be an electrical waterproof gel. Electrical insulation gel is made to handle high voltage and stay re-enterable for accessing connections. Using the wrong sealant can lead to electrical issues and hazards. Always opt for a product designed for electrical insulation.
Yes, Adiseal is over-paintable with most water-based paints once cured. Unlike standard silicone sealants which repel paint, Adiseal’s MS polymer chemistry allows for a seamless finish, making it ideal for decorative or professional construction projects.
Where To Buy Adiseal Waterproof Sealant
Ready to use the UK’s strongest and most versatile sealant? Adiseal provides a permanent, flexible, and 100% waterproof solution for your next project.
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Suhail Matadar
Suhail Matadar has extensive experience in the construction industry as an electrician, involved in installing, inspecting, and testing electrical systems in various projects. He excelled in sales, working for a major UK wholesaler, selling construction products to professionals and the DIY market. Suhail's background includes working at a leading home emergency repair company dealing with trades people. With a BEng (Hons) degree in Electronic Engineering, Suhail has worked with PLCs in the nuclear fuel manufacturing industry. During his studies, he gained practical experience at a chemical manufacturing company known for producing award-winning cleaning, hygiene, and livestock protection products for over a century. Currently, Suhail runs a global business specialising in supplying, researching, testing, and distributing chemical construction products like adhesives and sealants.