Waterproof Sealant
Waterproof Sealant: High-Performance Sealing With Adiseal
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.
- Why choose Adiseal waterproof sealant?
- What is the best clear waterproof sealant?
- How to apply
- What Types Of Materials Do Waterproof Sealants Work On?
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.
Adiseal Demonstration: Sealing Leaks Instantly
What Are The Benefits Of Adiseal Waterproof Sealant & Adhesive?
- Works in dry, wet, and even underwater conditions.
- High grab adhesive (for even more grab, use Adiseal Hi-Grab).
- Gap filler sealant (excellent for irregular surfaces).
- Resists mould and prevents fungal growth.
- Over paintable (paint can be mixed into Adiseal Ultra Clear to make custom coloured sealant).
- Non-brittle (remains a flexible sealant for long-lasting results).
- 100% waterproof adhesive and water-resistant sealant.
- UV resistant (suitable for all outdoor applications).
- Virtually odourless (no harsh smell when applying product).
- Isocyanate free and solvent free (safe for use on sensitive materials).
- No shrinkage or cracking (provides a better, longer-lasting seal).
- Flexible sealant and flexible adhesive.
- Prevents bacteria growth.
- Good resistance to chemicals.
- EC1 Plus certified (No VOC – very low emissions).
- ISEGA certified – safe for use in food preparation areas.
- Suitable for indoor & outdoor adhesive sealant use.
- Industrial strength sealant and adhesive.
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
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 can seal and bond underwater but isn’t designed for constant submersion. When using Adiseal to affix a tile in a pool filled with water, it’s crucial for the tile and grout to act as a barrier, preventing water from reaching the adhesive after installation. Adiseal can then be suitable for such applications, even in pools permanently filled with water.
What Types Of Materials Do Waterproof Sealants Work On?
They 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
Adiseal is the best external waterproof sealant. With its ability to seal instantly, even underwater, it’s the ultimate choice for all your sealing needs. Its high mould resistance makes it perfect for external use, and its clear formulation stays clearest even after prolonged submersion in water. Plus, Adiseal works just as well in the rain, making it the ideal weather resistant solution for your sealing needs.
Adiseal weatherproof sealant is built to perform in any weather, be it rain, dry spells, or even underwater. It seals instantly, perfect for patching leaks in gutters or outdoor structures, especially during rainy spells. Plus, it offers a durable, flexible seal that can brave extreme weather conditions.
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.
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.
Adiseal, a waterproof sealant, is effective even on damp surfaces, perfect for wet conditions. Its water-resistant properties guarantee reliable adhesion in various applications.
Adiseal sealant can stop water leaks even in wet conditions. Adiseal can be applied in dry, damp, wet and even underwater to seal instantly. It provides a strong, flexible and durable seal.
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.
Shop the full range at GuGlue.com
Official Worldwide Distributor & Trade Supplier
📍 Find a Local UK Stockist
Contact us with your postcode for the nearest store details
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.