Adiseal – Adhesive & Sealant
What is the Best Adhesive Sealant for Bonding or Sealing?
Adiseal adhesive and sealant has proven to be the strongest construction adhesive and sealant on the market in independent testing. It outperformed competitor products by over three times, achieving an incredible bond strength that exceeded 3123 psi without breaking. Formulated as a high-performance MS polymer, this versatile product works flawlessly in dry, wet, and even underwater conditions to deliver a flexible, waterproof, and UV-resistant seal that will not shrink or crack.
- Unrivalled Bond Strength: Outperforms competing grab adhesives by over 360%, enduring 3123+ psi where others failed at 1115 psi or lower.
- All-Weather Application: Bonds and seals instantly on dry, damp, wet, and completely submerged surfaces.
- Advanced Mould Resistance: Proven to stay entirely clear and resist fungal growth even after 90 days of continuous water submersion.
- Zero Shrinkage or Cracking: Solvent-free formulation maintains high active product concentration so it stays permanently flexible.
- Certified Safe Formula: Awarded EC1 Plus for the lowest VOC emissions and ISEGA certified for safe use in kitchens and food prep areas.
- Multi-Material Compatibility: Provides a heavy-duty bond on metal, wood, concrete, stone, brick, mirrors, PVC plastic, and polystyrene.
Quick Links
- What is the best grab adhesive
- What about other construction adhesives
- CT1 sealant adhesive vs Adiseal
- What is the best sealant
- How to use Adiseal adhesive and sealant
- Frequently asked questions about adhesive & sealant
What is the best grab adhesive
To identify the best grab adhesive, Ultimate Handyman conducted completely independent, rigorous performance tests. Each product was applied directly between wood and metal surfaces, allowed to cure, and subjected to a heavy-duty hydraulic ram to measure the exact breaking point of the bond.
The strongest adhesive was easily Adiseal
Adiseal emerged as the indisputable champion, displaying astonishing strength that completely destroyed the competition. Its immense power became evident as the test rig’s mounting screws began to tear out of the timber and the hydraulic ram seals gave way, forcing the test to be stopped prematurely. Adiseal proved too strong for the testing rig itself.
| 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 |
“That is actually unbelievable!”
Ultimate Handyman
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 construction 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 frequently make grand marketing claims about being “360% stronger” without presenting verifiable evidence. In real-world, independent metal-to-metal tests, the older Adiseal formula broke at 201 psi, outperforming the older CT1 formula which broke at 148 psi. With our new formula pushing well past 245 psi (metal-to-metal) and 3123+ psi (wood-to-metal), Adiseal delivers clear, tangible advantages over CT1 adhesive sealant at a much better value:
- Stronger Grab: Proven superior holding power under extreme hydraulic stress.
- Flawless Water Clarity: Adiseal Ultra Clear stays perfectly transparent underwater, whereas CT1 clear sealant turns a cloudy white.
- Superior Mould Resistance: Formulated to remain completely clear and free of fungal growth during extended water submersion.
- Lower Price Point: Why spend extra money on a brand name that does not perform as well? Adiseal separates hype from reality.
🎁 We are so confident in our formula that we offer UK tradespeople a free tube of Adiseal White 290ml. Claim yours directly on our dedicated offer page.
For details of test verification and proof, please visit the CT1 page.
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 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 money on a brand that doesn’t perform as well as Adiseal. We say separate hype from reality.
Adiseal vs Gorilla Grab Adhesive
In the independent metal-to-metal bond strength test, Gorilla Grab adhesive broke at 166 psi, while Adiseal outperformed it by breaking at 245 psi. In the wood-to-metal test, Gorilla Grab broke at 862 psi, whereas Adiseal excelled past 3123 psi without breaking, establishing Adiseal as the significantly stronger heavy-duty adhesive choice.
Adiseal vs Tec 7 sealant and adhesive
In the metal-to-metal bond strength test, Tec 7 broke at 165 psi, while Adiseal broke at 245 psi. In the wood-to-metal pressure test, Tec 7 failed at 1016 psi, while Adiseal reached over 3123 psi without breaking.
Adiseal vs HB42 sealant and adhesive
HB42 broke at 184 psi in metal-to-metal tests and 942 psi in wood-to-metal tests. Adiseal soundly outperformed it in both environments, recording 245 psi and 3123+ psi respectively.
Adiseal vs PL Premium
Loctite PL Premium broke at 202 psi in the metal-to-metal test and failed at 873 psi in the wood-to-metal test. Adiseal displayed superior structural strength in both independent test categories.
Materials Adiseal will bond
Adiseal is a universal MS polymer engineered to bond virtually most materials. 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, Aluminium, Lead, Copper, Iron, Zinc | Perfect for gutter repairs, flashing, and structural metal-to-concrete bonding. |
| Plastics & Synthetics | PVC, ABS, Polycarbonate, Fibreglass, 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.
While Adiseal can bond to Bakelite, its smooth surface may require sanding with fine-grit sandpaper to create a mechanical “key” for the adhesive. This is recommended for all smooth surface materials.
What materials does it not work on?
While Adiseal adhesive sealant is highly versatile, it does not adhere well to low surface energy (LSE) plastics like polypropylene (PP), polyethylene (PE), and polytetrafluoroethylene (PTFE/Teflon).
Key Materials to Avoid:
- LSE Plastics: Polypropylene (PP), Polyethylene (PE), Nylon (Polyamide) and Polythene.
- Non-Stick Surfaces: PTFE (Teflon).
- Contaminants: Asphalt, oils, and existing silicone residue.
- Incompatible Adhesives: Uncured polyurethane or silicone-based products.
Colours
Adiseal adhesive 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.
What is the best sealant
To find the best construction sealant, a test submerged various leading sealants inside plastic cups filled halfway with tap water under identical conditions. Even after 90 days of continuous water submersion, both Adiseal sealant and its surrounding water remained remarkably clear and entirely free of fungal growth.
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 sealant adhesive and at a higher price, fell short in the mould resistance test.
Are you looking for a clear sealant?
Adiseal Ultra clear sealant and 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
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 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 sealant adhesive products from different manufacturers were tested. Each product was carefully applied inside new clean plastic cups, filled halfway with water, securely covered, and placed under identical conditions to maintain a fair test.
Adiseal Ultra Clear was the only sealant among those tested that successfully retained its clarity both in and above the water line. Cheaper alternative sealants appeared cloudy or white when applied. Even the high-priced CT1 adhesive sealant performed the worst, turning completely white both below and above the water line.
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
While the record-breaking strength is undisputed, Adiseal is engineered for professional environments where conditions are rarely perfect:
Environmental & Weather Resistance
| Feature | Professional Benefit |
|---|---|
| All-Weather Use | Weatherproof adhesive sealant works in dry, wet, and even fully submerged underwater conditions. |
| 100% Waterproof | Provides a total waterproof bond and water-resistant seal. |
| Extreme Temperature | Remains stable and effective from -40°C to +100°C. |
| UV Resistance | High resistance to UV rays, making it ideal for all outdoor applications. |
| Resists Mould | Resists mould and prevents fungal and bacteria growth over time. |
| Chemical Resistance | Offers good resistance to chemicals and environmental stressors. |
Advanced Bonding & Application Mechanics
| Feature | Professional Benefit |
|---|---|
| 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. |
| Permanent Flexibility | Non-brittle formula remains flexible to accommodate movement. |
| Zero Shrinkage | Does not shrink or crack, ensuring a better, longer-lasting seal. |
| Primer-Free Bonding | Eliminates the need for primers on clean, dust-free surfaces. |
| Zero Staining | Advanced formula will not bleed into porous stone, marble, or masonry. |
| Indoor Or Outdoor Use | Provides high quality bonds or seals in interior or exterior applications. Ideal for use as an exterior masonry adhesive. |
| Industrial Strength | Heavy-duty performance for both indoor and outdoor construction. |
Safety, Certifications & Finishing
| Feature | Professional Benefit |
|---|---|
| Over-Paintable | Can be painted over with most (non-oil based) paints. Mix paint into Adiseal Ultra Clear for custom colours. |
| Safety-First Formula | Isocyanate-free and solvent-free; safe for use on sensitive materials. |
| Low Odour | Virtually odourless formula for a more pleasant application experience. |
| EC1 Plus Certified | Rated for very low emissions (No VOCs) for indoor air quality. |
| ISEGA Certified | Safety certification for use in food preparation areas. |
Details of benefits
Works in dry, wet and underwater
Adiseal is a versatile product 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 setting products, 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 harsh odour during use, eliminating the need for well-ventilated areas. It’s safe and nearly odourless formula offers a user-friendly experience.
Solvent Free
Products containing solvents can harm some 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 products 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 away from a surface 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 more 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).
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 or exterior bonding and sealing 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.
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:
Attach wood to concrete or brick
A detailed guide on adhesives is also available on our website.
Applications
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
- 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.
- Open cartridge
Cut open the the top part of the tube. Screw on the nozzle. Cut the nozzle to the correct size if necessary.
- Apply the product
For bonding applications, apply Adiseal 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.
- Wait for it to cure
Adiseal can take 24 to 48 hours to fully cure.
- 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
📍 Find a Local UK Stockist
Contact us with your postcode for the nearest store details
To buy Adiseal products in other countries, visit https://guglue.com/
Frequently asked questions about adhesive & sealant
In an independent adhesive strength test, Adiseal outperformed all other grab adhesives by remaining intact up to a maximum pressure of 3123 psi. The remaining brands broke at significantly lower levels, with SupaBond breaking at 1115 psi, Tec 7 at 1016 psi, HB42 at 942 psi, Loctite PL Premium at 873 psi, Gorilla Grab Adhesive at 862 psi, Bond It PU18 at 582 psi, and Bond It Save Nails at 411 psi. These results demonstrate that Adiseal possesses the highest bond strength among the tested products.
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.
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.
The best overall construction sealant is Adiseal. It delivers an instant waterproof seal, acts as an emergency leak repair in wet weather or fully underwater, will not shrink or crack over time, and offers the highest independently tested resistance against mold and fungal growth.
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.
Yes. High-performance construction adhesive sealants like Adiseal are specifically formulated for external applications. They feature advanced UV-stabilized blockers, extreme weather resistance, and thermal tolerance from -40°C to +100°C to withstand severe environmental fluctuations.
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.