Strongest Adhesive
Strongest Adhesive: Adiseal Wins in Independent Strength Test
Adiseal is the proven strongest adhesive in independent testing, withstanding over 3123+ psi. This professional-grade MS-polymer provides a high-performance, waterproof bond for many construction materials and heavy-duty masonry projects.
- Record-Breaking Strength: Exceeded 3123+ psi in independent testing by Ultimate Handyman, performing over 3x stronger than leading competitors.
- No Primer Required: Bonds wood, metal, stone, and plastics to concrete without the need for sealers or primers.
- All-Weather Bonding: Engineered to work on wet, dry, or even underwater surfaces.
- Permanent Flexibility: A non-brittle formula that acts as a shock absorber for thermal expansion and vibration.
- Professional Grade: 100% waterproof, high gap-fill, and EC1 Plus certified for very low emissions.
Quick links
- What is the strongest adhesive?
- What about other adhesive not in this test?
- Adiseal vs CT1 – Which is the strongest adhesive?
- Metal to metal adhesive strength test


What Is The Strongest Adhesive For Heavy-Duty Bonding
While various construction glues can bond to masonry, most fail under extreme stress or moisture. Adiseal construction adhesive sealant stands apart by maintaining a high-tensile bond where traditional grab adhesives fail. Its MS-polymer formulation ensures that the bond remains permanently flexible, preventing the ‘brittleness’ often seen in standard adhesives when exposed to concrete’s natural alkaline properties and thermal expansion.

Independent Strength Test Performance: Adiseal vs. Competitors
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.
| 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 Concrete Bonding
While the record-breaking strength is undisputed, Adiseal is engineered for professional environments where conditions are rarely perfect:
| 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 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. Ideal for use as an exterior masonry adhesive. |
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 concrete 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.

Where To Buy
Used by professionals and independently verified by Ultimate Handyman.


The video below shows the method and results of the independent adhesive strength test carried out by Ultimate Handyman.
Strongest adhesive strength test results table
| Product | Max pressure when adhesive bond broke (psi) |
| Adiseal | 3123 + psi |
| SupaBond | 1115 psi |
| Tec 7 | 1016 psi |
| HB42 | 942 psi |
| Loctite PL Premium | 873 psi |
| Gorilla Grab Adhesive | 862 psi |
| Bond It PU18 | 582 psi |
| Bond It Save Nails | 411 psi |
“That is actually unbelievable!”
Testimonials
Testimonials & some comments on the: Grab adhesive tests 2017, video on YouTube
- That Adiseal is phenomenal!
- That Adiseal is some stuff though, definitely need to get some of that bought!
- I instantly went looking for Adiseal!
- Need to get my hands on some of that to try out.
- Looks like a cracking product.
- 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.
What about other adhesive not in this test?
Throughout the years, Ultimate Handyman has conducted a range of independent tests, meticulously documenting the results on the Ultimate Handyman YouTube channel. These comprehensive tests have covered a wide array of products, including the previous formulation of Adiseal, as well as other brands like Soudal, Geocel, and C-Tec CT1 adhesive sealant.
Best & strongest adhesive
Manufacturers often make bold claims about their adhesives, asserting it to be the best or strongest product available. However, only one product can genuinely hold the title of the best construction adhesive. Independent testing is crucial to assess their performance and determine which product truly stands out with strong adhesive bonds.
Adiseal vs CT1 – Which is the strongest adhesive?
Manufacturers often market their construction adhesives and sealants as the best, but it’s essential to scrutinize these claims beyond marketing hype. Some assert their product is 360% stronger without evidence. Instead of making unsupported claims, we prefer to demonstrate how Adiseal outperforms CT1 adhesive and sealant. We invite you to see the tangible benefits of Adiseal over CT1 and make an informed decision based on real-world comparisons.
- Adiseal adhesive has stronger grab than CT1 adhesive.
- Adiseal sealant has stronger mould resistance than CT1 sealant.
- Clear Adiseal sealant stays clear in water whereas CT1 clear sealant turns white in water.
- Adiseal has been shown to be the strongest adhesive in an independent adhesive strength test.
- As well as Adiseal being better than CT1 in numerous ways, Adiseal is also lower priced than CT1.
- Adiseal adhesive sealant colours cure faster than CT1 adhesive sealant colours.
Proof of claims
The powerful Adiseal surpasses both C-Tec CT1 and BT1 sealant adhesives in performance while being priced lower than both. To access comprehensive test result data proving Adiseal’s excellence over CT1 and BT1, please contact us via email. As a testament to our confidence in Adiseal’s superiority over CT1, we offer a complimentary tube of Adiseal White 290ml to tradespeople in the UK. This exclusive opportunity allows you to personally experience and verify Adiseal’s exceptional performance compared to CT1 and BT1. For more details about this offer, please visit our dedicated offer page. We believe that the most reliable way to establish Adiseal’s superiority over CT1 and BT1 is by testing it yourself, rather than relying solely on manufacturers’ marketing claims.
Is CT1 actually 360% stronger?
Manufacturers often exaggerate their product claims, such as being “360% stronger” than competitors. It’s crucial to question the validity of these bold assertions, especially without supporting evidence, which can be dismissed as mere marketing hype.
In a previous independent adhesive strength test by Ultimate Handyman, the old formulas of CT1 and Adiseal were compared in a metal-to-metal adhesive strength test. The old formula of CT1 broke at 148 psi, while the old formula of Adiseal broke at 201 psi. This test showed that even the old formula of Adiseal outperformed CT1 in strength. The new formula of Adiseal exhibited even greater strength, breaking at 245 psi in the metal-to-metal test. The powerful Adiseal achieved an astonishing 3123+ psi in the wood-to-metal test without breaking. These results solidify Adiseal’s position as the unrivaled strongest adhesive and sealant, as proven by independent testing. In contrast, CT1’s claim of being “360% stronger” lacks manufacturer-backed evidence.
Additionally, Adiseal Ultra Clear surpasses CT1 clear sealant in clarity, maintaining transparency in water better. For test results as proof, please contact us.
Why pay more for a brand name that falls short on performance when you can choose Adiseal? We encourage you to distinguish hype from reality and make an informed decision based on proven results.
Adiseal vs Gorilla Grab Adhesive
In extensive tests by Ultimate Handyman, Gorilla Grab Adhesive was rigorously examined alongside Adiseal. In the metal-to-metal adhesive tensile strength test, Gorilla Grab Adhesive broke at 166 psi, while Adiseal outperformed it, breaking at an impressive 245 psi. In the wood-to-metal adhesive strength test, Gorilla Grab Adhesive broke at 862 psi, but the superior Adiseal excelled, reaching an astonishing 3123 psi without breaking.
These independent tests provide concrete evidence of Adiseal’s superior strength in both metal-to-metal and wood-to-metal applications compared to Gorilla Grab Adhesive, establishing Adiseal as the ultimate choice for exceptional adhesive strength and unmatched performance.
Adiseal vs Tec 7 sealant and adhesive
Ultimate Handyman conducted a comprehensive assessment of Tec 7 Sealant and Adiseal. In the metal-to-metal adhesive strength test, Tec 7 broke at 165 psi, while Adiseal clearly surpassed it, breaking at 245 psi. In the wood-to-metal adhesive strength test, Tec 7 broke at 1016 psi, whereas Adiseal showed exceptional strength, reaching an impressive 3123 psi without breaking.
These independent tests confirm Adiseal as the preferred choice for exceptional adhesive strength and outstanding performance compared to Tec 7 in both metal-to-metal and wood-to-metal applications.
Adiseal vs HB42 sealant and adhesive
Ultimate Handyman’s adhesive strength test demonstrates Adiseal’s superiority over HB42 sealant and adhesive. Adiseal excelled in both metal-to-metal and wood-to-metal strength tests, breaking at 245 psi and an impressive 3123 psi, respectively. In comparison, HB42 broke at 184 psi and 942 psi in the respective tests. These independent results confirm Adiseal’s significant superiority over HB42.
Adiseal vs Loctite PL Premium
In Ultimate Handyman’s adhesive strength test, Adiseal outperformed Loctite’s PL Premium in both metal-to-metal and wood-to-metal strength tests. PL Premium broke at 202 psi in the metal-to-metal test, while Adiseal demonstrated superior strength, breaking at 245 psi. In the wood-to-metal test, PL Premium broke at 873 psi, whereas Adiseal showcased exceptional high strength, reaching an impressive 3123 psi without breaking. These results highlight Adiseal’s significantly greater strength compared to Loctite’s PL Premium.
Metal to metal adhesive strength test
In Ultimate Handyman’s metal-to-metal strength test, Adiseal continued to exhibit its unmatched strength, solidifying its position as the undisputed strongest adhesive. Its consistent exceptional performance establishes Adiseal not just as a good option but as the ultimate choice for grab adhesive, outperforming competitors by a significant margin.
Materials it can bond
Adiseal strongest adhesive will successfully stick the following items:
- Wood
- Glass
- Stone
- Ceramic
- Rubber (natural)
- Metal like steel, copper, iron, brass, lead, aluminum and others.
- Synthetic Materials
- Leather
- Most Plastics
- Concrete
- Cement
- Travertine
- Fibreglass
- Fabric
- Granite
- Marble
- Brick
- Mirror
- Masonry
- Polystyrene
- Breeze block
- Many other items

Different items stuck to a concrete block with Adiseal strongest construction adhesive.
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.
Please note Adiseal adhesive sealant colours provide a stronger adhesive bond compared to the clear version.
What are the benefits of Adiseal
Data Sheets
Where to buy strongest adhesive
In the UK, to buy the strongest adhesive, please contact us for details of your local stockist. To buy Adiseal products in the USA, Canada, France, Australia or any other country, visit https://guglue.com/ who can post to other countries.
Frequently asked questions about strongest adhesive
Adiseal has been shown to be the strongest adhesive in an independent adhesive strength test. The adhesive bond of Adiseal did not break at over 3123 psi whereas all other adhesives broke at 1115 psi or lower in the independent test.
The better product is Adiseal. It has proved to be the strongest adhesive in an independent test. To find out specific details of how Adiseal is better than CT1, please send us an email.
Adiseal is widely regarded as the strongest adhesive currently available. It proved to be the strongest product in an independent test.
The strength of an adhesive is typically determined through testing, where it is subjected to specific conditions and forces to measure its ability to bond and withstand stress.
The strength of an adhesive is influenced by factors such as its chemical composition, bonding surface area, adhesive thickness, and the compatibility of the adhesive with the materials being bonded.
Yes, the strength of an adhesive can vary depending on the types of materials being bonded. Different adhesives may have better compatibility and bonding strength with specific materials.
To ensure the strongest bond, it’s important to follow proper surface preparation techniques, apply the adhesive according to the manufacturer’s instructions, and provide sufficient curing or drying time as recommended.
Adiseal grab adhesive has been shown to be the strongest grab adhesive in an independent adhesive strength test. Adiseal demonstrated it was over 3 times stronger than any other product tested. As well as providing the strongest bond, it is also flexible, UV resistant and waterproof.
Adiseal adhesive has proven in independent testing to be the strongest adhesive in the UK. The test showed the high strength bond of Adiseal did not break at even over 3123 psi whereas the next best adhesive broke at 1115 psi.
