Clear Sealant
Clear Sealant: Waterproof, Transparent. Seals in Dry or Wet
Adiseal ultra clear sealant is a transparent waterproof sealant that will provide a high quality water resistant seal that is see through. It can seal instantly in dry or wet conditions. Adiseal is very versatile and used to seal a variety of items. It is equally great as an exterior clear sealant as well as for indoor use. Adiseal outperforms clear silicone, mastics and caulks in many different sealing applications.
- What is the best clear sealant?
- Benefits of Adiseal ultra clear sealant adhesive
- Waterproof clear sealant

What is the best clear sealant?
Adiseal Ultra Clear is our best clear sealant. It provides a high performance, transparent and long lasting waterproof transparent seal on many different applications. Not all clear sealants, caulks or mastics are truly transparent when applied, often appearing cloudy instead. However, Adiseal Ultra Clear stands out as the top choice for a waterproof clear sealant. Unlike other products like clear silicone, caulk or mastic, Adiseal delivers exceptional see through clarity both during application and after drying, ensuring a crystal clear transparent seal finish.
Clear silicone sealant
Cheaper clear silicone, caulks and mastics can appear cloudy or even almost white instead of truly transparent. Unlike clear silicone, Adiseal Ultra Clear maintains a crystal-clear appearance both when applied and after drying.

Transparency test
We tested the ability of several clear sealants to be able to keep the transparency, especially when in contact with water which a sealant would often be in contact with. We applied products from various manufacturers inside new clean plastic cups, filled them halfway with water, covered them with plastic sheets and stored them in a cool dark location for several days.
The test results, shown below, highlight Adiseal Ultra Clear’s unmatched performance. In our test, Adiseal was the best performing clear sealant, staying exceptionally clear even when submerged in water. It was the only product to remain transparent both in and above water line.

The image highlights performance differences among the tested products. Competitor products turned white when in contact with water, while Adiseal excelled. Even under challenging conditions, Adiseal remained impressively clear above the waterline, with only slight cloudiness below the waterline.
Benefits of Adiseal Ultra Clear Sealant Adhesive
- Works in dry, wet, even underwater
- Waterproof sealant
- Waterproof adhesive
- Gap filler
- Resists mould
- Flexible seal
- Over paintable (paint can be mixed into Adiseal Ultra Clear to make custom coloured sealant)
- Non brittle
- UV resistant
- Virtually odourless
- Isocyanate free
- Solvent free
- No shrinkage or cracking
- Remains a flexible sealant
- Prevent fungal growth
- Prevent bacteria growth
- Indoor and outdoor sealant adhesive
- Good resistance to chemicals
- EC1 Plus certified (no VOC)
- ISEGA certified – safe for use in food preparation areas
Material
Adiseal is highly versatile and can bond or seal many different items including the following materials:
- Wood
- Glass
- Stone
- Ceramic
- Rubber
- Metal
- Synthetic Materials
- Plastic
- Concrete
- Mirror
- Brick
- Masonry
- Polystyrene
- Roof felt
- Marble
- Granite
- Fiberglass
Waterproof clear sealant
Adiseal ultra clear waterproof sealant offers unmatched clarity and sealing capabilities. It excels at sealing leaks in various conditions, be it dry, damp, or even fully submerged situations. This makes Adiseal great for carrying out emergency repairs even in the rain.
Indoor and outdoor sealant
Adiseal is a versatile clear waterproof sealant for both interior and clear exterior sealant use. Its flexibility and adaptability suit various interior or exterior sealing applications. With UV resistance, it maintains clarity and performance under sunlight, making it reliable for roof sealing and gutter repairs. It creates a transparent and seamless finish that effectively protects roofs from water damage.
Clear roof sealant
Adiseal excels at instantly sealing roofs, even in rainy conditions. It is highly versatile and can effectively seal various types of roofing materials. Whether you need it for emergency repairs or permanent fixes, Adiseal is a reliable choice.
Clear gutter sealant
Adiseal Ultra Clear is not only suitable for various applications but also serves as an effective clear gutter sealant. Its exceptional sealing capabilities extend to both dry and wet conditions. When using Adiseal as your clear gutter sealant, you can trust it to prevent leaks even during rainfall.
CT1 sealant clear vs Adiseal Ultra Clear
In our comparison test between CT1 sealant clear and Adiseal Ultra Clear, Adiseal emerged as the superior product. When applied, Adiseal displayed a higher level of clarity compared to CT1 clear adhesive sealant. Furthermore, even after drying, Adiseal maintained its superior clarity in comparison to CT1 sealant adhesive.
In the transparency test in water, Adiseal stayed much more clearer than CT1 sealant, outperforming it by a big margin. We are confident in the quality of our product, which is why we are offering tradespeople in the UK a free tube to try it for themselves. To claim your free tube, please visit our offer page. Kindly indicate your preference for the clear version, as we typically send the white version.

How to use a clear sealant
How to use a clear sealant
- Surface Preparation
Ensure the surface is clean, dry, and free from dust, grease, and other contaminants. Use a suitable cleaner if necessary and allow the surface to fully dry before applying the sealant.
- Cut the Nozzle
If using a tube of sealant. The size of the nozzle opening will determine the width of the sealant bead.
- Apply the Sealant
Starting at one end of the desired area, slowly and evenly apply the sealant in a continuous bead. Maintain a consistent pressure on the caulking gun or tube to ensure a smooth and uniform application.
- Tooling
Immediately after applying the sealant, use a sealant tool. This helps ensure proper adhesion and creates a neat finish. Remove any excess sealant.
- Drying and Curing
Allow the sealant to dry and cure according to the manufacturer’s instructions. This process may take several hours or longer, depending on the sealant type and environmental conditions.
- Clean-Up
Clean excess sealant from tools, surfaces, and your hands using an appropriate solvent or soapy water before it dries.
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.
Where to buy?
In the UK, to buy clear sealant, please contact us for details of your local stockist. For other countries, our Adiseal ultra clear sealant can be purchased from https://guglue.com/product/adiseal-adhesive-sealant-ultra-clear-290ml/
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
- Brown adhesive and brown sealant
Adiseal can also be manufactured in any RAL colour.
Frequently asked questions about clear 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.
Adiseal Ultra Clear is the best clear sealant. It is crystal clear and is more clear than other products. Adiseal remains clear in water whereas other products we tested turned white. It is a waterproof product that is suitable for use both interior & exterior applications. 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
It is a type of sealant specifically designed to provide a transparent, watertight barrier, ensuring effective protection against water infiltration.
It can be used in a wide range of applications, including sealing windows, doors, glass panels, bathroom fixtures, outdoor structures, and more.
Adiseal ultra clear waterproof sealant has been shown to be the best product. It has the ability to seal instantly in dry or wet conditions. It is very clear once applied and also stayed clearest in our test in water where competitor products turned white.
Adiseal is a sealant that is waterproof. It can be applied to dry, damp & wet surfaces. Due to its waterproof property, Adiseal can also seal instantly even in the rain.