Professional Construction Products

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Black Sealant

Black Sealant Adhesive: Waterproof Seal Outdoors or Indoors

Adiseal black sealant is a high-performance waterproof sealant that provides a superior water resistant seal instantly. It can seal in dry or wet conditions making it ideal for stopping leaks. Its waterproof properties make it equally great for outdoor as well as for indoor use. Adiseal provides a better seal and bond than black silicone sealant or adhesive for many different sealing, bonding or caulking applications.

Adiseal black sealant

Why Choose Adiseal?

Adiseal has numerous advantages over black silicone. These include:

  • Works in dry, wet, even underwater
  • Waterproof black sealant adhesive
  • High gap fill
  • Resists mould
  • Over paintable (paint can be mixed into Adiseal Ultra Clear to make custom coloured sealant)
  • Non brittle (stays flexible)
  • UV resistant
  • Virtually odourless (no harsh smell when applying product)
  • Isocyanate free
  • Solvent free (safe for use on sensitive materials that can be damaged by solvent based products)
  • No shrinkage or cracking
  • Prevent fungal growth
  • Prevent bacteria growth
  • Good resistance to chemicals
  • EC1 Plus certified
  • ISEGA certified – safe for use in food preparation areas

The standard curing time for Adiseal is 24 – 48 hours to fully cure. Curing times can increase in colder temperatures.

Details of benefits

Works in dry, wet & underwater

Adiseal seals effectively in dry, wet, and even underwater conditions. This is very useful, particularly in urgent situations such as sealing a leaking gutter. Unlike black silicone that requires a dry surface for application, Adiseal excels in emergency repairs.

Demonstration of sealing underwater with wet sealant.
Demonstration of sealing underwater.



Adiseal’s waterproof sealing properties outperform black silicone in many sealing applications. It ensures effective sealing and immediate testing capabilities. Additionally, Adiseal is a dependable choice for automotive purposes.

Waterproof sealant available in different colours including black.


Solvent Free

Adiseal solvent-free sealant, ensures enhanced safety when working with delicate materials sensitive to solvents. Polystyrene, sometimes used in bath panels, is especially vulnerable to solvents in black bath sealants. Adiseal’s solvent free formula means it’s safe for use on polystyrene and other sensitive materials.


EC1 Plus certified

Adiseal boasts the lowest Volatile Organic Compound (VOC) content among its counterparts and holds the prestigious EC1 Plus certification.


Black kitchen sealant

Adiseal’s ISEGA certification makes it an ideal black kitchen sealant, ensuring safety and reliability for food-related applications.


Interior & exterior use

Adiseal is versatile for both interior and exterior use, outperforming specialized products, making it superior for diverse sealing needs. Whether you need a black worktop or roof sealant, Adiseal excels in both applications.

How to use a black sealant

How to use a black sealant

  1. Prepare the surface

    Ensure that the surface you are sealing is clean, dry, and free from any dirt, dust, or loose particles. Use appropriate cleaning methods and tools to prepare the area.

  2. Cut the nozzle

    Cut the nozzle of the black sealant. Make sure to cut a small opening that matches the desired bead size.

  3. Apply the sealant

    Apply a consistent bead along the desired area. Use steady pressure on the gun trigger to control the flow of the sealant.

  4. Tool the sealant

    After applying the black sealant, use a caulk smoothing tool to smooth and shape the sealant bead. This helps create a neat and professional finish.

  5. Cleanup

    Any excess sealant should be wiped away using a damp cloth before it dries. Avoid smearing or spreading the sealant outside the desired area.

  6. Allow curing time

    Follow the manufacturer’s instructions to determine the recommended curing time for the black sealant. This can vary depending on the specific product and environmental 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.

Demonstration of applying black sealant on wet brick.
Applying black sealant adhesive on wet brick.

Where to buy Adiseal

To buy black sealant in the UK from stockists, please contact us for details of you local stockist. For other countries that do not have an Adiseal distributor, visit www.guglue.com

Other colours

Adiseal is also available in the following colours:

Frequently asked questions about black sealant

How to remove black sealant?

Most silicone sealants are solvent based. For solvent based products, Adisolve can be used to deactivate the product. Spraying Adisolve on top of the product will help the silicone peel away from the material it is stuck to. Use a sharp item then to cut away any sealant that remains stuck to the surface.

What is the best black sealant adhesive?

Adiseal is the best black sealant. Adiseal works in the dry, damp, wet and even underwater. It seals instantly even in the rain. It is UV resistant and has many other benefits.

What are the common uses of black sealant?

It is versatile and can be used in various applications. They are commonly used for sealing gaps, joints, and cracks in construction, automotive, plumbing, and other industries. It is also used for weatherproofing, waterproofing, and bonding different materials together.

What surfaces can black sealant be used on?

They can be used on a wide range of surfaces, including metal, wood, concrete, glass, ceramic, plastic, and more. It is important to ensure that the surface is clean, dry, and free from oil or contaminants before applying the sealant.

What is the best black sealant?

Adiseal black sealant has been shown to outperform black silicone. Adiseal can be applied in dry, damp, wet or even underwater. Unlike black silicone, Adiseal can seal instantly making it ideal for emergency repairs as well. Adiseal provides a strong, durable and waterproof seal.

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.