Flexible Adhesive
What is the Best Flexible Adhesive for Strong Durable Bonding?
A flexible adhesive is essential for bonds that must withstand movement, vibration, or thermal expansion without cracking. While many products offer flexibility, the best flexible adhesive combines high-tensile strength with permanent elasticity.
For the best flexible adhesive, Adiseal is the strongest adhesive, proven in independent testing by Ultimate Handyman. Withstanding 3123+ psi without breaking, Adiseal is over 3X stronger than competitor products.
This professional-grade MS-polymer provides a heavy-duty, durable, waterproof and flexible bond on many construction materials like wood, metal, concrete, brick and more. Adiseal also features high gap-fill, UV-resistance, works in dry or wet conditions, and is suitable for both indoor or outdoor use.
Quick links
- What Is The Strongest Adhesive For Heavy-Duty Flexible Bonding
- Why use a flexible adhesive?
- How to use a flexible adhesive
- Extra strong adhesive for many different materials
- Where to buy flexible adhesive
What Is The Strongest Adhesive For Heavy-Duty Flexible Bonding
While various construction glues and adhesives can bond to construction materials, 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.
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 Flexible 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 | 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. Ideal for use as an exterior masonry adhesive. |
Where To Buy
Used by professionals and independently verified by Ultimate Handyman.
Why use a flexible adhesive?
- Temperature changes
- Vibration
- Moisture changes
- Wind
- Knocks
- Sound
- Expansion
- Contraction
Non-flexible adhesives and glues become brittle as they harden, which raises the risk of adhesive failure. A brittle glue or adhesive bond is prone to cracking, weakening over time, and eventually failing. In contrast, an adhesive that remains elastic, stretchable and flexible glues can absorb stresses and joint movement without cracking, resulting in a more durable resilient bond. They can accommodate the stresses placed on the adhesive without it becoming weak.
Problems of using the wrong adhesive
Using a glue or adhesive without flexibility, when a flexible one is needed, can lead to various problems:
- Lack of Joint Movement Accommodation: Non-flexible adhesives and glues harden and become brittle, unable to withstand movement or stress, compromising the bond over time, potentially resulting in cracks, delamination, or failure.
- Structural Issues: When bonding materials with different expansion coefficients, like metal and plastic, they cannot adapt to varying rates of expansion and contraction, causing gaps, leaks, or disintegration.
- Inability to Withstand Environmental Factors: Non-flexible adhesives and glues may not endure environmental conditions like temperature fluctuations, moisture, or vibrations. This can worsen the rigidity of the adhesive, leading to premature bond failure and potential assembly damage.
Choosing the right adhesive or glue that matches the specific application requirements is crucial for ensuring lasting, reliable results. Using an adhesive with stretchable elastic bonding in the video below could have prevented the bond failure experienced with the non-flexible adhesive.
How to use a flexible adhesive
How to use a flexible adhesive
- Surface Preparation
Ensure that the surfaces to be bonded are clean, dry, and free from any dirt, dust, grease, or contaminants. Clean the surfaces thoroughly using an appropriate cleaner or solvent if necessary.
- Application
Apply the product evenly to one of the surfaces using a suitable applicator.
- Bonding
Align the surfaces to be bonded and carefully press them together, applying firm and even pressure. Make sure the adhesive spreads evenly between the surfaces, ensuring maximum contact.
- Curing Time
Allow the adhesive to cure as per the manufacturer’s instructions. This typically involves giving it sufficient time to dry and develop a strong bond. Keep in mind that curing times can vary depending on the type of adhesive used, environmental conditions, and the materials being bonded.
- Clean-Up
Remove any excess adhesive immediately using a suitable solvent or cleaner recommended by the manufacturer.
- Post-Cure
After the initial curing period, it is advisable to allow additional time for the adhesive to fully cure and reach its maximum strength. This may involve keeping the bonded item in a stable environment with optimal temperature and humidity conditions.
Tip: To store Adiseal once opened, leave about 1cm worth of product out of the nozzle and store the tube upright in a cool dry place. Adiseal requires moisture for it to cure. The exposed part out of the nozzle will cure creating a cap. To re-use Adiseal, pull the cured part out or cut the nozzle until the uncured part is reached.
Extra strong adhesive for many different materials
Adiseal flexibility demonstration
The video shows the flexibility of Adiseal adhesive sealant once it is cured.
Flexible PVC adhesive
Adiseal is a robust and flexible adhesive perfect for PVC and other plastics, delivering strong bonds with PVC materials. Note that it may not be suitable for certain plastics like polypropylene, polyurethane or polyethylene. For maximum bond strength, thorough surface cleaning is essential. Adiseal is an excellent option for applications like PVC cladding, PVC trunking, PVC pipes, and other items demanding a robust and flexible PVC adhesive solution.
Flexible wood adhesive
Adiseal is exceptional as both a PVC and wood adhesive, forming strong stretchable elastic bonds on various wood types, demonstrating its versatility in woodworking. For optimal bond strength, thorough cleaning of wood surfaces before applying the adhesive is essential. This step guarantees Adiseal’s durable and reliable bond, instilling confidence in any wood bonding project.
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.
Where to buy flexible adhesive
In the UK, to buy flexible adhesive, please contact us for details of your local stockists. For other countries, Adiseal products can also be purchased from https://guglue.com/product-tag/flexible-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.
Frequently asked questions about flexible adhesive
The best flexible adhesive is determined by its tensile strength and elongation at break. The best flexible adhesive according to independent adhesive strength testing was Adiseal adhesive sealant. In the test, it withstood 3123+ psi without the bond breaking, which was over 3 times stronger than competitor products.
Flexible adhesives offer several advantages, such as accommodating joint movement, preventing cracks or failures, providing resilience in varying conditions, and maintaining bond strength over time.
Flexible adhesives can bond a wide range of materials, including plastics, metals, wood, rubber, fabric, and more.
Yes, many products are designed to withstand outdoor conditions, including exposure to sunlight, moisture, and temperature fluctuations.
To achieve a strong bond, it is important to ensure both surfaces are clean, dry, and free from contaminants. Following the manufacturer’s instructions regarding application thickness, curing time, and surface preparation is crucial.
Some products may not be suitable for bonding certain materials, such as polypropylene or polyethylene. It is important to check the manufacturer’s guidelines for compatibility with specific materials.
A flexible adhesive is required when there is potential movement in the material being bonded. Materials naturally move due to a number of factors like temperature or moisture changes. Non-flexible adhesive set hard and brittle, which can weaken or even break over time due to the movement. An adhesive that remains flexible has elastic properties to allow it to stretch and bend without the bond becoming weak.
Buy Adiseal flexible adhesive sealant at our official shop www.guglue.com
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.