Waterproof Adhesive
What is the Best Waterproof Adhesive for a Heavy-Duty Bond?
Adiseal waterproof adhesive and sealant is the proven strongest adhesive in independent testing by Ultimate Handyman. Withstanding 3123+ psi without breaking, it is over 3X stronger than competitor products.
This professional-grade MS-polymer provides a heavy-duty, flexible, UV-resistant, 100% waterproof bond on many construction materials like metal, brick, concrete or wood. Adiseal features high gap-fill, works in dry, wet or underwater conditions, and is suitable for both indoor or outdoor use.
Quick links
- Why Adiseal Is The Best Professional Waterproof Adhesive?
- What Is The Strongest Waterproof Adhesive
- High-Performance Features For Water Resistant Bonding
- What Materials Will Adiseal Stick To?
- How to Use Adiseal Waterproof Adhesive for Maximum Bond
- Jump to FAQ’s
Why Adiseal Is The Best Professional Waterproof Adhesive?
Adiseal is widely considered the best professional waterproof adhesive due to its record-breaking strength and exceptional versatility, as demonstrated in independent tests where it outperformed competitors by over three times.
This high-performance MS polymer is engineered to work in dry, wet, and even underwater conditions, making it an ideal, instant-sealing solution for challenging repairs like leaking gutters in the rain. Its unique, solvent-free, and permanently flexible formula ensures that the bond will not shrink, crack, or become brittle over time, accommodating natural material movement and resisting UV light and mould growth for a long-lasting, reliable seal.
Adiseal bonds effectively to a vast array of materials, including metal, wood, glass, concrete, stone, and most plastics, proving itself as a superior, all-in-one product that eliminates the need for multiple specialized adhesives.
What Is The Strongest Waterproof Adhesive
To verify our performance claims, we look to independent testing conducted by Ultimate Handyman. In a controlled environment, various construction adhesives were tested to find the maximum pressure they could withstand before the bond failed. Adiseal was the only product to exceed 3123+ psi, at which point the test was forced to stop because the testing rig itself began to break.
Independent Strength Test Results: Adiseal vs. Competitors
| Product Name | Max Strength (PSI) | Test Result |
|---|---|---|
| Adiseal | 3123+ psi | Bond Unbroken (Test Abandoned) |
| SupaBond | 1115 psi | Bond Failed |
| Tec 7 | 1016 psi | Bond Failed |
| HB42 | 942 psi | Bond Failed |
| Loctite PL Premium | 873 psi | Bond Failed |
| Gorilla Grab | 862 psi | Bond Failed |
| Bond It PU18 | 582 psi | Bond Failed |
| Bond It Save Nails | 411 psi | Bond Failed |
The Video Evidence
Watch the Independent Strength Test
As seen in the video, Adiseal outperformed the next best product by over 3 times. The bond was so strong that the test had to be abandoned to prevent damage to the heavy-duty test equipment.
Following the record-breaking results in the Ultimate Handyman independent trial, professional users shared their feedback on the performance of Adiseal:
- That Adiseal is phenomenal!
- That Adiseal is some stuff though, definitely need to get some of that bought!
- I instantly went looking for Adiseal!
- Having used the two most expensive brands on numerous occasions, I’ll be trying out the others, especially the Adiseal.
- Adiseal certainly surprised me in this test!
- Fantastic tests. It’s unbelievable that Adiseal test with the hardwood.
High-Performance Features For Water Resistant Bonding
While Adiseal is the strongest waterproof adhesive on the market, its professional utility comes from its ability to perform where others fail. Below are the core technical advantages:
| Feature | Professional Benefit |
|---|---|
| All-Weather Use | Weatherproof adhesive sealant 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 Adhesive & Waterproof Sealant | 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 high quality bonds or seals in interior or exterior applications. |
Optimized Key Benefits for Waterproof Projects:
- Instant Emergency Repair: Unlike standard silicones, Adiseal acts as an instant-seal waterproof adhesive for leaking gutters or roofs, even during heavy rain.
- Structural Integrity: With a 3123+ psi rating, it replaces the need for mechanical fixings in many heavy-duty construction applications.
- High Initial Grab: Provides immediate suction on vertical surfaces, significantly reducing the need for temporary shoring or supports.
Adiseal Adhesive Sealant vs. Adiseal Hi-Grab
While both products offer the same record-breaking final bond strength, choosing the right version depends on your specific concrete project:
- Adiseal adhesive sealant: Best for applications where you need to move or “slide” the item into the perfect position before it sets. It has high gap-fill and is the best choice for general bonding.
- Adiseal Hi-Grab: Best for heavy vertical items (like large stone wall claddings or heavy signs). It provides instant suction, usually eliminating the need for temporary supports or shoring while the adhesive cures.
Mould resistance
Where a waterproof adhesive is exposed to water, there is a chance of mould growth on top of the adhesive. Adiseal has high mould resistance. We tested the mould resistance of adhesives by leaving them submerged in water for a few days. As can be seen in the image below, Adiseal remained mould free even after 90 days of continuous submersion in the same water making it also a great waterproof sealant.
Clear waterproof adhesive
Adiseal ultra clear waterproof adhesive is a truly transparent waterproof adhesive, unlike other clear adhesives that turn out to be cloudy instead. It also maintains its clarity when exposed to water.
What Materials Will Adiseal Stick To?
Adiseal is a universal MS polymer engineered to bond virtually any surface, even when submerged. It replaces the need for specialized wood glues, masonry adhesives, and plastic sealants.
| Surface Category | Compatible Materials | Professional Application |
|---|---|---|
| Masonry & Stone | Concrete, Brick, Granite, Marble, Slate, Limestone, Travertine | Ideal for paving, wall capping, and non-staining stone cladding. |
| Metals | Steel, Aluminum, Lead, Copper, Iron, Zinc | Perfect for gutter repairs, flashing, and structural metal-to-concrete bonding. |
| Plastics & Synthetics | PVC, ABS, Polycarbonate, Fiberglass, GRP, Polystyrene | Used for roofing sheets, window frames, and plumbing fixtures. |
| Wood & Timber | Hardwood, Softwood, MDF, Plywood, Chipboard | Provides a waterproof bond that won’t rot or weaken in damp environments. |
| Glass & Ceramics | Clear Glass, Mirrors, Porcelain, Tiles, Quartz | Securely bonds mirrors (non-corrosive) and kitchen/bathroom tiles. |
| Roofing Materials | Felt, Asphalt, EPDM, Bitumen, Shingles, Rubber (natural) | Instant emergency leak repair on major roofing substrates. |
Why Adiseal Bonds Better to Different Materials:
- Non-Porous Excellence: Unlike water-based adhesives, Adiseal cures via atmospheric moisture, allowing it to bond two non-porous surfaces (like metal to glass) effectively.
- Anti-Stain Technology: Many adhesives “bleed” oils into stone or marble. Adiseal’s chemically inert formula ensures zero migration into porous materials.
- Vibration Resistance: On materials prone to movement (like metal roofing or wood floors), Adiseal acts as a shock absorber, maintaining the bond during thermal expansion.
Where To Buy
How to Use Adiseal Waterproof Adhesive for Maximum Bond
How to use a waterproof adhesive
- Surface Preparation
Ensure surfaces are free from dust, grease, and loose debris. While Adiseal works on wet surfaces and underwater, removing heavy slime or algae ensures the strongest possible bond.
- Apply the Adhesive
Apply Adiseal to one of the materials. For the strongest bond, apply in vertical strips or “dots” to allow for moisture-to-air contact, which facilitates the curing process.
- Join and Align
Press the surfaces together firmly. If using the standard Adiseal Adhesive Sealant, you can slide the item into the perfect position. If using Adiseal Hi-Grab, apply direct pressure for an instant suction bond.
- Allow to Cure
Let the adhesive set. Adiseal cures at approximately 2-3mm per 24 hours. Pro Tip: Do not stress the bond or expose it to extreme mechanical loads until it has fully cured.
- Temporary support (not always necessary)
If the items do not stay in place until the waterproof adhesive cures then use temporary supports to hold them in place.
- Clean Up
Immediately wipe away any excess adhesive using a dry cloth or a solvent-based cleaner. Once cured, Adiseal must be removed mechanically (scraped).
Expert Storage Tip: To keep Adiseal fresh after opening, leave a 1cm “plug” of product protruding from the nozzle and store the tube upright. This plug will cure, creating an airtight seal. When you’re ready to use it again, simply pull out the cured plug or trim the nozzle.
Colours
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.
Frequently Asked Questions About Waterproof Adhesive
A waterproof adhesive is a specialized bonding agent designed to maintain a high-strength, durable seal when exposed to water or high humidity. It is essential for marine environments, outdoor construction, and wet areas like bathrooms and kitchens.
Waterproof adhesives, like Adiseal MS polymer, use moisture-triggered curing or chemical cross-linking to repel water and prevent bond degradation. They create a chemical bond between surfaces, preventing water from penetrating and compromising the bond.
Some waterproof adhesives are formulated to cure and adhere even when submerged in water. These underwater adhesives are often used in swimming pool repairs, aquarium assembly, and marine applications.
Not all waterproof adhesives are suitable for all materials. Some adhesives work better on certain surfaces than others. It’s essential to choose an adhesive that is compatible with the materials you are bonding.
Yes, “waterproof glue” and “waterproof adhesive” are frequently used interchangeably. They both describe an adhesive or bonding material designed to resist water and maintain its integrity even when exposed to moisture or submerged in water. These adhesives find use in various applications, such as sealing and bonding materials in wet or damp environments, including outdoor projects, marine applications, and plumbing fixtures.
Adiseal is a high-performance adhesive engineered to bond and seal on wet surfaces and underwater. As a solvent-free hybrid polymer, it uses moisture to cure, providing an instant seal for emergency repairs like leaking gutters during heavy rain.
Yes, Adiseal is a high-performance MS polymer that cures fully even when submerged, making it ideal for marine and pool repairs.
In independent testing, Adiseal was proven the strongest, resisting over 3123+ psi—over three times the strength of standard competitors like Gorilla Glue or Loctite.
Adiseal Hi-Grab is the best waterproof grab adhesive, independently proven to withstand 3123+ psi—over three times the strength of competitors. This solvent-free MS polymer provides instant suction and a permanent, flexible bond in dry, wet, and even fully submerged underwater conditions without shrinking or cracking.
Adiseal adhesive sealant is the best waterproof adhesive, verified as the strongest in independent testing at 3123+ psi. It bonds almost any material, including metal, wood, and stone, in all weather conditions. It remains permanently flexible, UV resistant, and mould-free, even when used submerged underwater.
Secure Your Project With The Strongest Waterproof Adhesive
Don’t settle for brittle bonds or adhesives that fail in wet conditions. Whether you are bonding heavy stone, metal brackets, or timber panels to masonry, the 3123+ PSI record-breaking strength of Adiseal ensures a permanent, flexible, and waterproof result.
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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 construction products like adhesives, sealants and drill bits.