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Metal Sealant

Waterproof Sealant for Metal: Watertight Bond & Seal

Adiseal sealant for metal provides a strong waterproof seal on many different types of metal. Whether you need to seal a metal roof or a repair leaking metal gutter, Adiseal metal sealant can seal instantly, even in the rain. Adiseal can seal in dry or wet conditions making it ideal for carrying out emergency repairs in wet conditions as well as for more permanent seals. It is designed to fill in cracks, gaps in joints and can be used for both interior and exterior weatherproof sealant applications.

Waterproof metal sealant for metal gutters can seal a leaking gutter instantly, even in the rain.

What is the best metal sealant?

Adiseal metal sealant outperforms other sealants for metal. It provides a waterproof seal that remains UV resistant, highly weatherproof, mould resistant and highly durable. It can be used to seal a variety of different metals including steel, stainless steel, iron, cast iron, copper, brass, aluminum and alloys.

Instant Sealing even in Rain

Adiseal proves highly effective in fixing leaks in both metal gutters and metal roofs. Upon application, it forms an immediate, watertight seal, effectively halting water leaks. Engineered to perform exceptionally well even in rainy conditions, Adiseal is invaluable for addressing leaks in metal gutter joints without requiring dry weather for application.

In our demonstration video, we showcased Adiseal’s remarkable ability to instantly seal leaks underwater. Using a large plastic box, we created a 250mm x 10mm hole, filled it with water, and applied Adiseal. Despite the initial water flow, Adiseal rapidly sealed the leak. Watch the video to witness Adiseal’s impressive performance firsthand.

Waterproof Properties

Adiseal excels in sealing metal gutter joints and metal roofs, especially during rainfall, thanks to its exceptional waterproof characteristics. Its unique formulation establishes a robust water-repellent barrier, effectively blocking water infiltration in the sealed area. Its waterproof adhesive and sealing properties maintain the integrity of the seal, ensuring your metal roof or metal gutters remain watertight, efficiently diverting water away from your home.

Demonstration of waterproof metal sealant sealing a leak underwater.
Demonstration of waterproof metal sealant sealing a leak underwater.

Weather Resistance

Adiseal excels in withstanding extreme weather conditions, enduring scorching heat, freezing cold, heavy rain, and intense UV exposure. Its advanced formula is precisely designed to endure harsh environmental elements, guaranteeing the longevity of your metal gutter or roof seal. Even in the most severe weather scenarios, Adiseal consistently provides dependable performance, offering protection against leaks and potential water damage.

Benefits of Adiseal

Some of the reasons why Adiseal sealant is the best sealant for metal gutters & roofs:

Best metal sealant

How to seal metal with a sealant

How to seal metal with a sealant

  1. Surface Preparation

    Ensure the metal surface is clean, dry, and free from any dust, grease, or debris. Clean it thoroughly using a suitable cleaner or solvent and allow it to dry completely before applying the sealant.

  2. Application

    Apply the metal sealant following the manufacturer’s instructions. Use a brush, caulking gun, or applicator recommended for the specific type of sealant you’re using. Apply a thin, even layer of sealant over the area that needs sealing or between metal joints.

  3. Allow for Curing

    Let the sealant cure or dry completely as per the manufacturer’s instructions. This curing time may vary depending on the type of sealant used. Avoid disturbing or applying any stress to the sealed area during this curing period.

  4. Check for Effectiveness

    Once cured, check the sealant for effectiveness. Ensure it has created a strong, waterproof, and durable seal over the metal surface or joints.

  5. Maintenance

    Follow any additional instructions or recommendations provided by the manufacturer for maintenance or reapplication if needed.

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.


Adiseal metal sealant is available in the following colours:

It is also possible to paint over the seal with most paints (testing on a small area is recommended) or mix a colour with the ultra clear version before applying the sealant. Adiseal can be manufactured to any RAL colour (minimum order quantity applies).

Adhesive for metal

As well as being able to seal metal, Adiseal can also provide a strong and flexible bond on metal. It has been shown to be the strongest adhesive in an independent adhesive strength test by Ultimate Handyman. It came first in the metal to metal adhesive bond strength test and also finished way ahead of all other products tested in the wood to metal bond strength test.

Where to buy Adiseal sealant for metal

In the UK, Adiseal metal sealant can be purchased from Adiseal stockist. Contact us for further details. For other countries, please visit www.guglue.com

Frequently asked questions about repairing gutter leak

What is the best sealant for metal?

Adiseal has been shown to provide a high quality waterproof seal on metal. It seals in dry or wet conditions and has a durable seal.

What do you use to seal metal to metal?

Adiseal has been shown to provide a high quality waterproof seal on metal. It seals in dry or wet conditions and has a durable seal.

Does sealant work on metal?

Adiseal sealant can provide a strong waterproof seal on many different types of metals. It can seal instantly even in wet conditions. It provides a durable and weatherproof seal.

What is the best sealant for metal to concrete?

To seal metal to concrete, Adiseal will provide a strong, waterproof and durable seal. It can both seal and bond metal to concrete providing a strong bond and water resistant seal.

Can metal sealants be used outdoors?

Yes Adiseal metal sealant is formulated to withstand outdoor conditions, including exposure to weather elements like rain, UV rays, and temperature fluctuations.

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.