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Adiseal – Adhesive & Sealant


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Adiseal Strongest Best Grab Adhesive & Sealant

Adiseal adhesive and sealant is a high-performance product that has been shown to be the strongest adhesive in an independent adhesive strength test. In the test it was shown to be over 3 times stronger than the nearest competitor. Adiseal bonds and seals in dry, damp, wet and even underwater.

Best adhesive sealant in test


Best grab adhesive

To identify the best grab adhesive, Ultimate Handyman conducted independent tests. Adiseal stood out significantly, surpassing its competitors by a wide margin.

Best strongest grab adhesive sealant. Adiseal is the best construction adhesive and sealant as proven by an independent test.

To assess the bond strength, each product was applied between hardwood and metal surfaces. A hydraulic ram applied pressure to measure the breaking point of the adhesive bond between wood to metal.

Best grab adhesive in independent test.



The strongest adhesive was easily Adiseal

Adiseal emerged as the indisputable champion, displaying astonishing strength surpassing its closest rival by over threefold. Its immense power became evident as the test rig’s screws began to tear out, and the hydraulic ram seal gave way, leading to the test’s premature termination. Adiseal proved too strong for the rig, establishing itself as the unrivaled strongest adhesive.

In terms of bond strength between hardwood and metal, Adiseal withstood over 3123+ psi, while all other products faltered at 1115 psi or lower. The chart below unequivocally highlights Adiseal’s remarkable strength, setting it apart as the best adhesive.


Strongest construction adhesive strength test result. Adiseal is the strongest adhesive, way ahead of all the other adhesives tested. Adiseal did not even break at over 3123 psi whereas all other adhesives broke at 1115 psi or below.
Strongest adhesive test results chart.


ProductMax pressure when adhesive bond broke (psi)
Adiseal3123 + psi
SupaBond1115 psi
Tec 71016 psi
HB42942 psi
Loctite PL Premium873 psi
Gorilla Grab Adhesive862 psi
Bond It PU18582 psi
Bond It Save Nails411 psi
Results of adhesive strength test between wood and metal


“That is actually unbelievable!”

Ultimate Handyman




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.



Video of construction grab adhesive strength test by Ultimate Handyman




What about other grab adhesives?

Ultimate Handyman has conducted independent tests, documented on the Utimate Handyman YouTube channel, covering a range of products, including the previous Adiseal formula and selections from brands like Soudal, Geocel, and C-Tec.




CT1 sealant adhesive vs Adiseal

Manufacturers often make grand claims about their construction adhesive and sealant, touting them as the top product in the market. However, it is essential to question whether these claims align with reality or if they are merely marketing hype. Instead of simply asserting that Adiseal is superior to CT1 sealant adhesive, we believe in substantiating our claim by demonstrating how Adiseal surpasses CT1 adhesive and sealant. We invite you to witness firsthand the tangible advantages of Adiseal over CT1 adhesive sealant and let the results speak for themselves.

  • 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.

For details of test verification and proof, please visit the CT1 page.

CT1 sealant vs Adiseal mould resistance comparison.

CT1 sealant clear vs Adiseal ultra clear. Clearness comparison in water.

CT1 adhesive vs Adiseal grab comparison.


If you’re looking for a CT1 alternative, Adiseal not only outperforms CT1 adhesive sealant and BT1 sealant but is also lower priced at the same time. To access comprehensive evidence of Adiseal’s superiority over CT1 and BT1, please contact us for test result data. We’re so confident in Adiseal’s quality that we’re offering a special deal for UK tradespeople: a free tube of Adiseal White 290ml. This allows you to personally experience and confirm Adiseal’s exceptional performance compared to CT1 and BT1. Find more details on this offer on our dedicated offer age. We believe the best way to establish Adiseal’s superiority over CT1 and BT1 is through your own testing, rather than relying solely on manufacturer claims.




Is CT1 really 360% stronger?

Manufacturers frequently make exaggerated claims, like being “360% stronger” than competitors, but it’s essential to question the validity of these assertions. Without supporting evidence, such claims are merely marketing hype.

In an independent adhesive strength test by Ultimate Handyman, Adiseal emerged as the record-breaking strongest adhesive. The test compared the old formulas of CT1 and Adiseal in a metal-to-metal strength test. The results showed the old Adiseal formula breaking at 201 psi, outperforming the old CT1 formula at 148 psi. Adiseal’s new formula achieved even greater strength at 245 psi in the same test and an astonishing 3123+ psi in the wood-to-metal test without breaking. These results firmly establish Adiseal as the unrivaled strongest adhesive and sealant, as confirmed by independent testing. In contrast, the claim of CT1 being “360% stronger” lacks any manufacturer-backed nor independent evidence.

In addition to its exceptional strength, Adiseal Ultra Clear surpasses CT1 clear sealant in terms of clarity. It maintains its transparency in water better than CT1 clear sealant and adhesive. If you require proof of actual test results, please don’t hesitate to contact us.

Why spend extra on a brand that doesn’t perform as well as Adiseal. We say separate hype from reality.




Strongest adhesive and sealant. Test results chart.


Adiseal vs Gorilla Grab Adhesive

In the Ultimate Handyman tests, Gorilla Grab Adhesive, made by the creators of Gorilla Glue, underwent rigorous examination. In the metal-to-metal adhesive strength test, Gorilla Grab Adhesive broke at 166 psi, while Adiseal outperformed it, breaking at 245 psi, establishing its superior strength.

Additionally, the wood-to-metal adhesive strength test showed significant differences. Gorilla Grab Adhesive broke at 862 psi, while Adiseal excelled, reaching over 3123 psi without breaking. These independent tests solidify Adiseal heavy duty adhesive as considerably stronger than Gorilla Grab Adhesive in both metal-to-metal and wood-to-metal strength.



Adiseal vs Tec 7 sealant and adhesive

In the Ultimate Handyman test, Tec 7 Sealant and Adhesive were thoroughly examined. In the metal-to-metal bond strength test, Tec 7 broke at 165 psi, while Adiseal proved to be the strongest, breaking at 245 psi, establishing its superiority over Tec 7.

The wood-to-metal adhesive strength test also showed significant differences. Tec 7 broke at 1016 psi, whereas Adiseal excelled, reaching over 3123 psi without breaking. This independent wood-to-metal strength test solidified Adiseal as significantly stronger than Tec 7.


Adiseal vs HB42 sealant and adhesive

Ultimate Handyman’s adhesive strength test confirmed Adiseal’s superiority over HB42 sealant and adhesive. Adiseal excelled in both the metal-to-metal and wood-to-metal strength tests. In the metal-to-metal test, HB42 broke at 184 psi, while Adiseal broke at 245 psi, demonstrating its superior strength. In the wood-to-metal test, HB42 broke at 942 psi, while Adiseal surpassed 3123 psi without breaking. These independent test results unequivocally establish Adiseal as significantly stronger than HB42.


Adiseal vs PL Premium

In Ultimate Handyman’s adhesive strength test, PL Premium from Loctite was also evaluated. The test results indicated that Adiseal outperformed PL Premium in both the metal-to-metal and wood-to-metal strength tests. In the metal-to-metal test, PL Premium broke at 202 psi, while Adiseal displayed superior strength by breaking at 245 psi. In the wood-to-metal test, PL Premium broke at 873 psi, whereas Adiseal excelled, surpassing 3123 psi without breaking. These results clearly establish Adiseal as significantly stronger than PL Premium from Loctite.



Materials Adiseal will bond

Adiseal will successfully stick the following items:


Adhesive on concrete used to stick different items to concrete. Items stuck to concrete include wood, metal, plastic, ceramic, stone, polystyrene and other items.
Different items stuck to a concrete block with the best grab adhesive.


Adiseal adhesive and sealant is available in the following colours:

Adiseal can also be manufactured in any RAL colour.


What is the best sealant?

In our quest to find the best construction sealant, we conducted tests, including a mould resistance assessment. New plastic cups were filled halfway with tap water, applied various sealants, and covered each cup, subjecting them to identical conditions for fairness. Among all the sealants tested, Adiseal clearly stood out as the winner with the highest mould resistance, as shown in the accompanying image.



Anti mould sealant and mould resistant sealant. Adiseal has stronger mould resistance than the competitor sealant claiming to be the number 1 sealant and adhesive.
Strongest mould resistant sealant test results.


Mould resistance test result

Even after a continuous 90-day submersion in tap water, both the Adiseal sealant and the water in its cup remained remarkably clear. In contrast, one competitor’s product, despite claiming to be the top adhesive and sealant at a higher price, fell short in the mould resistance test.


Are you looking for a clear sealant?

Adiseal Ultra clear sealant & adhesive is truly clear, setting it apart from other construction sealants. Unlike cheaper silicone sealants that may appear cloudy or white when applied, Adiseal maintains its promised clarity.


Adiseal has strongest colour retention

Clear sealant in water comparison. Adiseal has stayed the clearest in water whereas the competitor claiming to be the best sealant and adhesive has turned white.
Colour retention of sealant. Test in water.

Adiseal construction sealant excels in both mould resistance and remarkable colour retention, even when submerged underwater. In contrast, a pricier competitor product, claiming to be the top construction adhesive and sealant, has visibly turned white when exposed to water, as shown in the image above.

Colour retention test

For the colour retention test, various clear sealants and adhesives from different manufacturers were used. Each product was carefully applied in pristine plastic cups, filled halfway with water, securely covered, and placed under identical conditions.

Clear sealant test in water. Out of all the clear sealants tested, Adiseal Ultra Clear sealant has stayed the clearest.
Clearest adhesive sealant test results.


Adiseal top in colour retention test

Adiseal was the only sealant among those tested that retained its clarity both in and above the water. In contrast, the clear product from the competing brand, which claimed to be the leading construction adhesive and sealant, performed the worst. It turned completely white, even the portion exposed to the air.

Why pay more for a brand name when it’s the performance that actually matters? We say separate hype from reality.

Adiseal Applications and Benefits

This section will look at what materials & items Adiseal will bond & seal:

Seals: Baths, showers, gutters, drains, sinks, kitchens, vehicles, boats, felt roofs & many other applications.

Benefits of Adiseal include:

Adiseal typically cures in 24 – 48 hours, with longer curing times in colder temperatures.


Details of benefits

Works in dry, wet & underwater

Adiseal is a versatile adhesive that works in wet, damp, dry, and underwater conditions, allowing for immediate sealing of leaking gutters in any weather. With Adiseal, repairs can be made and tested right away, ensuring a durable and effective waterproof seal. This waterproof adhesive eliminates the need to remove water before bonding materials, making Adiseal the top choice for gutter sealing and various applications.



Waterproof adhesive

Adiseal stands out as the ultimate waterproof adhesive, offering exceptional strength and reliability. It excels in various applications that demand a waterproof bond, ensuring a durable and long-lasting result.

Tip: In areas prone to water runoff, apply thin vertical strips of waterproof adhesive. This approach allows water to flow down between the adhesive strips, preventing accumulation on the surface.


Instant Power Grab

Adiseal offers high initial grab even on wet surfaces and underwater. For an even quicker grab, consider Adiseal Hi-Grab adhesive, providing exceptional instant power grab and bond strength.

Adiseal colours offer superior initial grab and bond strength compared to Adiseal Ultra Clear. For the best results when using Adiseal as an adhesive, it’s recommended to choose Adiseal colours.


Gap Filling Adhesive

Adiseal is ideal for bonding uneven surfaces and filling gaps, especially on rough or irregular surfaces like natural stone. Unlike contact adhesives, Adiseal creates a secure and robust bond across the entire surface, preventing slumping even in overhead applications. This unique capability sets it apart from products that lack high gap-filling properties.

Over Paintable

Adiseal comes in various colours like white, black, grey, brown, and ultra clear, and can also be custom-made in any RAL colour to meet specific requirements. It’s generally paint-friendly, but it’s wise to test solvent and oil-based paints for compatibility. Lightly sanding the surface can improve paint adhesion. For the best results, it’s recommended to wait for Adiseal to fully cure, typically around 48 hours, before painting over it.

Tip: Customize Adiseal Ultra Clear by blending it with your chosen paint color, achieving the exact shade you need for your adhesive and sealant. Apply the custom-colored Adiseal with a piping bag, tube, or cartridge to your project.


Flexible Adhesive

Adiseal is a top choice for a highly flexible adhesive that remains strong and resilient. Its flexibility accommodates temperature and moisture changes and vibrations without becoming brittle. Unlike rigid adhesives, Adiseal maintains its strength and durability over time, creating long-lasting, reliable bonds that are less likely to fail.


Virtually Odourless

Adiseal distinguishes itself from other products as it is solvent and isocyanate-free. Unlike solvent-based options, Adiseal doesn’t release a strong, harsh odour during use, eliminating the need for well-ventilated areas. Its safe and nearly odourless formula offers a user-friendly experience.


Solvent Free

Adhesives and sealants containing solvents can harm materials, like polystyrene used for insulation and bath panels, causing them to melt. Adiseal, being solvent-free, is non-aggressive and the ideal choice for bonding polystyrene.

Mirror backing is also easily damaged by solvents. For secure mirror applications, Adiseal is the strongest product. Its solvent-free formulation ensures a reliable bond on mirrors without risking damage to the mirror.


No Shrinkage or Cracking

Adiseal stands out in its category as a solvent-free solution, preventing issues like shrinkage and cracking. Many adhesives and sealants use solvents to reduce production costs, which can dilute the active product in the cartridge. As solvents evaporate, these products tend to shrink and crack over time. Adiseal’s solvent-free formula maintains a higher concentration of active product, preventing shrinkage and cracking during application. Furthermore, it’s designed to maintain permanent flexibility, ensuring a long-lasting, non-brittle bond.


Problem of using cheap products

Low-quality silicone sealants can peel before curing due to solvent-induced shrinkage. Likewise, cheap adhesives with solvents lead to weaker bonds, unlike Adiseal.

Adiseal, being solvent-free, offers a significantly stronger and durable bond. Choosing cheaper options can become more costly, requiring removal and replacement when they fail.


EC1 Plus certified

Adiseal is certified EC1 Plus meaning it has the lowest certified VOC (volatile organic compound) for adhesives & sealants.


ISEGA Certified

Adiseal is ISEGA certified for safe use in food preparation areas, making it the ideal kitchen sealant.


Suitable for interior & exterior use

Adiseal is a versatile high-performance product suitable for interior and exterior applications. Whether used indoors or as a outdoor sealant, it maintains exceptional waterproofing.

When used on items like roof felt, Adiseal not only bonds strongly but also seals the roof, offering both secure adhesion and moisture protection.



 Video of best grab adhesive & waterproof sealant demonstration.



Best construction adhesive & construction sealant for specific applications

Adiseal’s high performance makes it the top choice for numerous applications, surpassing competitors in areas such as:

Adhesive for skirting boards

Best construction adhesive

Mirror adhesive

Gutter sealant

Adhesive on concrete

Glue metal to wood

Bond metal to metal

Adhesive for plastic

Repair a felt roof

Lead sealant

Adhesive for artificial grass

Glue for Rubber

Glue for plastic to metal

Stick stone

Roof leak

Glue for ceramic

Underwater sealant

Glue for brick

Waterproof sealant

PVC adhesive

Masonry adhesive

Weatherproof sealant

Waterproof adhesive

Polystyrene adhesive

Panel adhesive

Shower panel adhesive

Attach wood to concrete or brick

Sink glue

Kitchen and bathroom sealant

Water leak sealant

Metal sealant

Builders adhesive

Strong sealant

Strong adhesive

Instant hold adhesive

Building adhesive

Slate adhesive

Limestone adhesive

Weatherproof adhesive



Sticking items to concrete including plastic, metal, wood, stone, ceramic, polystyrene and other items.
Demonstration concrete block with different items glued on with Adiseal.


A detailed guide on adhesives is also available on our website.



Industrial adhesive sealant

Some of the industrial applications Adiseal has been successfully used is to:

  • Bond industrial freezer panels where other products failed.
  • Bond metal bearings to concrete bridges.
  • Seal & bond a variety of applications on boats.
  • Seal in warehouse used for a food manufacturing production line.
  • Maintenance of University halls of residence.


Small items

For items that have a small surface area, the Adiglue glue product might be more suitable but it will provide a more brittle bond than Adiseal.


Electrical insulation sealant

Standard sealants are not suitable for use as electrical insulation gel. Electrical waterproof gel is specially designed to offer high-voltage insulation. Unlike regular sealants, it stays flexible and re-enterable, facilitating access to electrical connections when necessary. Choosing the right gel designed for electrical applications is vital for safety and performance.



How to use Adiseal adhesive and sealant

How to use Adiseal adhesive and sealant

  1. Prepare surface material

    To achieve a strong bond or seal, clean the surfaces by removing dirt, oil, grease, paint, and dust. On materials such as concrete, using a fine brush like a paintbrush can remove dust. Adisolve helps remove oil, grease, tar, chewing gum, and ensuring a clean surface.

  2. Open cartridge

    Cut open the the top part of the tube. Screw on the nozzle. Cut the nozzle to the correct size if necessary.

  3. Apply the product

    When using Adiseal as an adhesive, apply it to one surface, covering as much area as possible for a stronger bond, then firmly press the materials together. Use temporary supports if needed until the adhesive cures. For sealing with Adiseal, fill the gap as much as possible by pushing the product into the gap to achieve a better seal.

  4. Wait for it to cure

    Adiseal can take 24 to 48 hours to fully cure.

  5. Storage after use

    After using, leave about 1cm worth of product out of the nozzle, which will cure and create a seal at the top. Store upright in a dry place. Under good conditions, you can use an opened Adiseal cartridge for up to 3 months after initial use. To reuse, remove the cured top part. If it has cured further down the nozzle, trim the nozzle or, in some cases, unscrew it to access the uncured portion. A new nozzle may be needed in this scenario.



Data Sheets



Free tube offer

We’re giving away a free tube of Adiseal White to any trades person. See offer page for more details.



Where to buy Adiseal

To buy adhesive sealant in the UK, Please contact us for details of your local stockist. To buy Adiseal products in other countries, visit https://guglue.com/


Frequently asked questions about adhesive & sealant

Which grab adhesive is best?

In an independent adhesive strength test, Adiseal outperformed other grab adhesives, as shown by the results of the test, which indicate the maximum psi at which the grab adhesive bond broke:
Adiseal: 3123 +
SupaBond: 1115
Tec 7: 1016
HB42: 942
Loctite PL Premium: 873
Gorilla Grab Adhesive: 862
Bond It PU18: 582
Bond It Save Nails: 411
Adiseal demonstrated the highest strength among the grab adhesives.

What is the strongest adhesive?

Adiseal was found to be the strongest adhesive in an independent adhesive strength test. While other adhesives in the test broke at 1115 psi or less, Adiseal exceeded 3123 psi and remained intact.

What is the difference between adhesive and glue?

Adhesive and glue differ in cure time and bond characteristics. Glue cures faster but creates a non-flexible, brittle bond. Adhesives offer greater initial grip, higher gap-fill capability, and maintain flexibility, as seen in products like Adiseal.

What is the best construction sealant?

The best construction sealant is Adiseal. It is seals instantly, stays permanently flexible, does not shrink or crack and can be applied to dry, damp wet surfaces and even underwater.

Which product is better, Adiseal or CT1 adhesive and sealant?

The better product is Adiseal. It has proved to be the strongest product in an independent test. To find out specific details of how Adiseal is better than CT1, please send us an email.

Can a construction adhesive sealant be used for outdoor applications?

Yes, many construction adhesive sealants are designed for outdoor use. They are formulated to withstand weathering, UV exposure, and temperature fluctuations commonly encountered in exterior environments.




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.