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Supex -501 Exterior Window Sealant


Window silicone sealant, Supex 501 

Exterior window silicone sealant, Supex  501 is a  gap filling sealant that on contact to atmosphere forms a durable elastomeric compound. It is a Green Building Product with Zero Percent VOC. 

BENEFITS including:

  • it is odourless and chemically neutral. 
  • Possibility of painting as well as grinding after curing.
  • possibility of applying multiple layers after curing
  • exterior as well as  interior applications.

Properties of Exterior Window silicone Sealant Supex 501

  • One-component.
  • Very easy application.
  • Form permanently water repellent layer after curing.
  • Resistant to weather conditions.
  • Remains flexible for a long time after curing.
  • Paintable.
  • Does not effect the application surface.
  • Elastic. It has bright, glossy appearance.
  • It can be used for all porous surfaces such as brick, concrete and wood.
  • Water, wind and moisture resistant on aluminium, wood and PVC frames and windows.

Uses of Supex 501 Sealant

SUPEX 501 bonds well on the whole to a wide variety of substrates. Thus, they are absolutely suitable for making permanent elastic seals. These seals are of high adhesive strength.

Gaps between prefabricated construction element. Assembly wood, PVC, iron and aliminium joinery. Joints in stone, wood, concerete, plaster and brick works etc. Sealing of window and door frame to masonry.

  • general gap filling and sealing
  • HVAC Duct sealing
  • skirting boards
  • Concrete Expansion joints.
  • In addition, concrete, Granite Joints.
  • Wood, Concrete , Granite,
  • Lastly, aluminum, G I Sheet, M. S. Panel

How to use window silicone sealant

Surface preparation: First and foremost, clean the  surfaces  dry. It must be free from all traces of grease, oil as well as dust. 

Tooling and FinishingTooling and finishing must be carried out within the tack  free time of the sealant. However, other finishing agent or lubricants must be tested for suitability or compatibility.


In the case of uncured sealant, remove it from tools and equipment with Supex Cleaner. Nonetheless, any another suitable solvent can also be used. As soon as it is cured, remove the material mechanically. Most importantly, wash Hands and exposed skin  immediately. Any hand clean towel or a suitable industrial hand cleaner and water can be used. Do not use solvents or petrochemical solvents. 

Not suitable for 

– Natural stonesiliconized acrylic sealant
– Structural glazing
– mirrors
– Glass to glass
– Automotive applications

Joint Size:
Minimum Width: 5mm
Maximum Width: 20mm
Minimum Depth: 5mm
Recommendation: joint depth = joint width

exterior sealant

Plz call us for Techno commercial queries

Toll Free No: 18001214771 | Whatsapp: +919833892782 email:

Packaging Details:
  • 500 gms cartridge , 24 cartridges included in a Box
  • Colours Available : White, Black.

HVAC Duct Sealing:

Window Sealing Questions answered

What is the best sealant for outside windows?

Your best choice is Supex 501 Exterior window sealant because it forms permanent, water- and weather-resistant seals in most exterior gaps and joints. It is durable, flexible, and resistant to UV radiation and ozone, making it ideal for caulking windows and other demanding outdoor applications.

Can you seal windows from outside?

Should windows be sealed on the outside? Yes, it’s best to apply caulk to both the interior and exterior when installing new windows. This will seal any unwanted air leaks. Using a sealant gun will ensure you fill any gaps and get a clean line.

What sealant do you use around uPVC windows?

Repairing your window sills and frames is a job for a flexible and durable sealant like Supex 488 Weather Guard Outdoor Window and Door Frame. This weatherproof propriety sealant provides permanent yet flexible seals to fill any gaps or cracks and can be used on wooden, plastic (uPVC) or metal window sills and frames.

Why does my window leak when it rains?
One of the most common reasons people discover leaking windows during rain is damaged or missing sealant . Sealing is one of the simplest and most overlooked causes of window leaks. Any damaged Sealant around the exterior of the window should be cleared out and replaced with a new bead of Supex sealant.
Why is my window leaking from the top?
The leaks could be anywhere around the window – top, sides or bottom. Often, these leaks happen because the sealant around the window has gotten old and cracked, allowing rain to enter the house. The fix for this situation is simple – peel out the old sealant and replace it with new window sealant.
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Brand Name
Product Name
Supex 501 Exterior & Interior Sealant
Weight0.7 kg
Dimensions5 × 5 × 12 cm

1 review for Supex -501 Exterior Window Sealant

  1. netesh

    very effective product

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