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Flexible Adhesive

Flexible Adhesive: Strong, Waterproof & Durable Bond

Adiseal flexible adhesive is a high-performance products than provides a strong and durable bond on tile and many other materials. As it is flexible, it provides a non-brittle bond which makes it more durable than non-flexible adhesives. Adiseal has also been shown to be the strongest adhesive in an independent adhesive strength test.

Best flexible adhesive sealant in test

Why use a flexible adhesive?

When bonding two items, it’s common for materials to undergo post-bonding movement, which can result from various factors, including:

  • Temperature changes
  • Vibration
  • Moisture changes
  • Wind
  • Knocks
  • Sound
  • Expansion
  • Contraction

Non-flexible adhesives become brittle as they harden, which raises the risk of adhesive failure. A brittle adhesive bond is prone to cracking, weakening over time, and eventually failing. In contrast, flexible adhesives can absorb stresses and joint movement without cracking, resulting in a more durable and resilient bond. They can accommodate the stresses placed on the adhesive.

Problems of using the wrong adhesive

Using a non-flexible adhesive when a flexible one is needed can lead to various problems:

  1. Lack of Joint Movement Accommodation: Non-flexible adhesives harden and become brittle, unable to withstand movement or stress, compromising the bond over time, potentially resulting in cracks, delamination, or failure.
  2. Structural Issues: When bonding materials with different expansion coefficients, like metal and plastic, non-flexible adhesives cannot adapt to varying rates of expansion and contraction, causing gaps, leaks, or disintegration.
  3. Inability to Withstand Environmental Factors: Non-flexible adhesives 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 that matches the specific application requirements is crucial for ensuring lasting, reliable results. Using a flexible adhesive, in the video below, could have prevented the bond failure experienced with the non-flexible adhesive.

Failure due to using a non-flexible adhesive.

What is the best flexible adhesive?

To find out the strongest and best adhesive, Ultimate Handyman conducted a series of adhesive strength tests. The results were nothing short of impressive. Adiseal emerged as the indisputable best adhesive, demonstrating unparalleled strength that far surpassed all other competitor products. In fact, no other adhesive even came close to matching the incredible adhesive power of Adiseal with it being over 3 times stronger than the nearest competitor. Witness the astonishing test yourself in the video below.

strongest flexible adhesive in test


The best adhesive was Adiseal

Adiseal’s adhesive strength significantly outperformed other grab adhesives, surpassing the competition by more than threefold. Such impressive strength led to the premature termination of the test. The force exerted by the hydraulic ram caused the screws securing the metal sheet to tear out, and even the hydraulic ram seal leaked, all before the Adiseal adhesive bond broke. Adiseal’s strength exceeded the capabilities of the test rig, solidifying its unrivaled dominance.

Strongest adhesive strength test results table 

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
Adhesive strength test results.

Strongest adhesive strength test by Ultimate Handyman

“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.

Strongest flexible adhesive in independent test results chart.

How to use a flexible adhesive

How to use a flexible adhesive

  1. 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.

  2. Application

    Apply the product evenly to one of the surfaces using a suitable applicator.

  3. 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.

  4. 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.

  5. Clean-Up

    Remove any excess adhesive immediately using a suitable solvent or cleaner recommended by the manufacturer.

  6. 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 flexible adhesive for many different items

Adiseal will provide an extra strong and flexible bond on the following items:

Adiseal flexibility demonstration

The video shows the flexibility of Adiseal adhesive & sealant once it is cured.

Flexible adhesive flexibility demonstration

In the video above, Adiseal bonded the bricks together, and even under repeated hammer strikes, the Adiseal flexible adhesive bond remained robust. Unlike standard adhesives that would fail under such force, Adiseal’s remarkable resilience is evident as it absorbs the hammer’s impact without breaking. This outstanding quality ensures a long-lasting, durable bond capable of withstanding severe impacts.

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 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 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.


Adiseal Applications and Benefits

Adiseal bonds and seals:

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

Other benefits of Adiseal adhesive and sealant include:

Adiseal is available in the following colours:

It can be manufactured in any RAL colour.

Strongest adhesive demonstration including flexibility

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/


Frequently asked questions about flexible adhesive

What is the best flexible adhesive?

In an independent adhesive strength test, Adiseal was found to be the best adhesive. It was a lot stronger than all the other products that were tested. In the wood to metal adhesive strength test, Adiseal flexible adhesive was way stronger than anything else tested.

What are the advantages of using a flexible adhesive?

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.

What materials can be bonded using a flexible adhesive?

Flexible adhesives can bond a wide range of materials, including plastics, metals, wood, rubber, fabric, and more.

Can flexible adhesive be used for outdoor applications?

Yes, many products are designed to withstand outdoor conditions, including exposure to sunlight, moisture, and temperature fluctuations.

How do I ensure a strong bond with flexible adhesive?

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.

Are there any limitations to using flexible adhesive?

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.

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.