Welcome to Supex
Welcome to Supex
Supex 500 is a paintable acrylic gap sealant designed for UPVC windows, doors, and general construction joints. It offers strong adhesion, flexible sealing, low odor, and a smooth finish that can be sanded and painted after curing—making it ideal for clean interior and exterior gap filling.
100% Authentic products
25+ Years of expertise
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100% Authentic products
25+ Years of expertise
Pan-India delivery
Supex 500 is a water-based acrylic gap sealant for uPVC windows, doors and general construction joints. It provides strong adhesion, a smooth finish and a non-sag application that works well on vertical joints. The cured seal can be sanded and painted for a clean, professional finish.
✓ Paintable and sandable
✓ Suitable for uPVC & aluminium window joints
✓ Non-sag application
✓ Strong adhesion to multiple building surfaces
✓ Low odour / water-based formulation
✓ Suitable for gap filling and construction joints
Window installation often leaves small gaps between the frame and the surrounding wall. These gaps need to be sealed properly before they become a source of drafts, dust, moisture entry or an untidy finish.
Supex 500 is designed for this type of application.
It can be used for sealing gaps around uPVC and aluminium windows, including joints between window frames and concrete, masonry, granite and other compatible building surfaces. Supex’s application guidance specifically recommends Supex 500 for uPVC-to-concrete gaps up to approximately 5–6 mm and for aluminium channel installations.
Not every window joint needs the same type of sealant. If the joint needs a clean, paintable finish, acrylic sealant can be a practical choice.
Supex 500 combines gap-filling performance with a finish that can be sanded and painted after curing.
Unlike standard silicone sealants, Supex 500 can be painted after curing.
This makes it useful where the seal needs to blend with the surrounding wall, plaster or frame.
Supex 500 is suitable for sealing gaps around uPVC and aluminium window frames and other building joints.
The sealant can be applied to vertical joints without readily flowing or sagging.
Supex’s current product information lists compatibility with materials including uPVC, aluminium, wood, concrete, plaster, tiles, masonry and granite. Always perform a compatibility test for a new substrate or production application.
The sealant can be tooled during application and sanded/painted after curing, helping installers achieve a neat finish.
Supex describes the product as water-based with low odour and zero-VOC positioning.
Supex 500 is suitable for a range of window and construction substrates.
| Surface | Typical application |
|---|---|
| uPVC | Window and door-frame gap sealing |
| Aluminium | Window and channel joints |
| Concrete | Frame-to-wall gaps |
| Brick & masonry | Window perimeter sealing |
| Wood | Door, frame and construction joints |
| Granite | Aluminium channel/granite joints |
| Plaster | Interior finishing and crack filling |
| Tiles | Suitable gap/sealing applications |
| ACP / panels | Selected construction applications |
The Supex technical information supports applications across uPVC, aluminium, concrete, wood, masonry and other building materials. For unfamiliar substrates, Supex recommends testing before large-scale use.
Seal the joint between a uPVC window frame and concrete or masonry wall for a clean, paintable finish.
For gaps up to approximately 5–6 mm, Supex’s published application guidance recommends Supex 500 directly.
Use Supex 500 for suitable joints around aluminium window frames and channels, including aluminium-to-concrete and aluminium-to-granite applications.
Supex 500 can also be used around uPVC/PVC door frames and other suitable building joints.
The acrylic formulation can be used for selected internal cracks, joints, skirting and trim applications.
Supex lists HVAC duct sealing among the product’s additional applications.
Remove dust, dirt, grease, oil and loose material. The surfaces should be clean and dry before application.
Cut the nozzle at the required angle and opening size. Load the cartridge into a suitable caulking gun.
Apply a continuous bead along the window-frame joint. Avoid leaving gaps in the bead.
Smooth the bead before the sealant becomes tack-free. This creates a clean and professional joint.
Remove excess uncured sealant during finishing.
Supex lists a tack-free time of approximately 15–60 minutes at 25°C and 50% RH, with a cure rate of around 2 mm per 24 hours. Actual curing depends on joint thickness, temperature and humidity.
Once fully cured, the seal can be sanded and painted where required.
Choosing the right sealant depends on the joint and the environment.
| Requirement | Supex 500 Acrylic | Silicone |
|---|---|---|
| Paintable finish | Yes | Usually no |
| uPVC window gaps | Yes | Yes |
| Aluminium window joints | Yes, application-dependent | Yes |
| Concrete/masonry | Yes | Yes, grade-dependent |
| Interior finishing | Excellent fit | Suitable |
| Easy painting | Yes | No |
500 g cartridge
24 cartridges per box
20 kg pail for higher-volume applications.
Solution:
Use Supex 500 to seal suitable small gaps around uPVC and aluminium frames.
Solution:
Supex 500 is designed for applications where a paintable finish is required.
Solution:
Supex 500 has a non-sag formulation for easier application on vertical joints.
Solution:
Use Supex 100 PU foam to fill the bulk of the gap, then apply Supex 500 as the finishing/top sealing layer.
Supex 500 is suitable for professionals and businesses involved in:
Window fabricators
Seal frame-to-wall gaps and achieve a clean finish.
Contractors
Use one paintable acrylic sealant for suitable construction joints and finishing work.
Builders
Use Supex 500 for selected window, door and building-joint applications.
Maintenance teams
Repair small gaps and joints where a paintable finish is required.
Supex 500 is a paintable acrylic gap sealant designed for uPVC windows, doors and suitable construction joints. It provides a smooth finish and can be sanded and painted after curing.
Yes. Supex 500 is designed for suitable uPVC window and door-frame gap sealing applications. Supex specifically recommends it for gaps between uPVC windows and concrete walls.
Yes. Supex’s published application guidance includes aluminium window/channel installation, including suitable joints between aluminium channels and granite or concrete.
Yes. Paintability is one of the main advantages of Supex 500 over standard silicone sealants. Allow the sealant to cure before painting.
Yes. It is suitable for regular window gap filling. Supex recommends it for uPVC window-to-concrete gaps up to approximately 5–6 mm.
For larger gaps, Supex recommends using Supex 100 PU foam to fill the bulk of the gap and then applying Supex 500 as a top coat.
The current product information lists uPVC, aluminium, wood, concrete, plaster, tiles, masonry and granite among compatible surfaces. Test unfamiliar substrates before large-scale application.
The listed tack-free time is approximately 15–60 minutes, while the stated cure rate is around 2 mm per 24 hours at the specified test conditions. Actual cure time depends on temperature, humidity and joint thickness.
Yes. the formulation as water-based and low odour, with zero-VOC positioning.
Clean and dry the surfaces, load the cartridge into a caulking gun, apply a continuous bead, tool the sealant before it becomes tack-free and allow it to cure before painting.
Seal uPVC and aluminium window gaps with Supex 500.
Get a paintable acrylic sealant for window frames, door joints and suitable construction applications.
Request a Quote, Talk to a Supex Expert
For bulk requirements, distributor enquiries or application guidance, contact the Supex team.
Supex 500 Window Sealant is suitable for a wide range of sealing and bonding tasks, offering permanent elasticity and strong adhesion across multiple materials. Its water-based acrylic formulation is flexible, paintable, and a cost-effective alternative to GP silicones.
Recommended Applications:
• Sealing gaps in uPVC and PVC window joints
• HVAC duct sealing and general air-handling systems
• Internal and external crack filling on walls and ceilings
• Sealing around skirting boards and trim
• Concrete expansion joints and general masonry sealing
• Bonding and sealing concrete, granite, wood, tiles, coatings
• Fixing and sealing aluminium, GI sheets, MS panels, machinery surfaces
• General glazing applications, including glass window sealing
1. Surface Preparation
Ensure all surfaces are clean, dry, and free from dust, grease, oil, or any contaminants. Proper preparation ensures strong adhesion and a clean finish.
2. Tooling & Finishing
Tool and finish the sealant within its tack-free time. If using any smoothing agents or lubricants, test them beforehand to confirm compatibility with the silicone.
3. Removal & Cleanup
Uncured sealant: Remove from tools or equipment using Supex Cleaner or a suitable solvent.
Cured sealant: Must be removed mechanically (cutting or scraping).
Skin contact: Clean immediately using a hand-cleaning towel or an industrial hand cleaner with water.
Do not use solvents or petrochemical cleaners on skin.
| Base | Acrylic |
|---|---|
| Specific Gravity | 1.65 ± 0.03 g/cm³ |
| Tack Free Time (25°C, 50% RH) | 15–60 min |
| Cure Rate | 2 mm / 24 hours |
| Tensile Strength at Break | ≥ 0.1 MPa |
| Elongation at Break | ≥ 100% |
| Modulus at 100% Elongation | > 0.2 MPa |
Packaging Options:
500 g cartridges (24 cartridges per box)
Also available in cost-effective 20 kg pail packing for bulk use
Available Colours:
Clear, White, Black, Brown, or customised colours upon request.
| Weight | 0.7 kg |
|---|---|
| Dimensions | 5 × 5 × 12 cm |
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