BOSTIK Pro Sealant S80 Glazing Silicone
£5.29 inc. VAT
£4.41 ex. VAT
- Product ID: 30923304
- Area of use: EXT & INT
- Application Method: Application Gun
- Volume: 310ml
- Container Type: Cartridge
- Type: Silicone
- Colour: Clear
- Brand: Bostik
- Manufactuer: Bostik
Bostik S80 Neutral Cure Glazing Silicone is a professional-grade glazing sealant with a low modulus formulation, offering up to ±25% movement capability. It provides excellent adhesion to most glazing joints, including PMMA and polycarbonate, making it ideal for conservatories and other glazing applications. With superior UV and weather resistance, it is suitable for both interior and exterior use, and is supplied in a sustainable post-consumer recycled (PCR) cartridge.
Key Points:
– Suitable for most glazing joints with ±25% flexibility for movement
– Excellent adhesion to PMMA and polycarbonate
– UV and weather resistant for interior and exterior applications
– Supplied in a post-consumer recycled (PCR) cartridge
STORAGE CONDITIONS
Store in original, unopened packaging for up to 24 months from the production date. Keep in a cool, dry place between +5°C and +25°C, out of direct sunlight, and protected from frost.
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BOSTIK S80 SILICONE is a professional-grade, neutral alkoxy cure silicone designed for glazing joints. It is low modulus, UV and weather resistant, and suitable for both interior and exterior applications. Specially formulated for durable, elastic sealing, it provides strong adhesion to most plastics, including PVCu, PMMA, and polycarbonate profiles and panels. Ideal for perimeter sealing of PVCu, aluminium, and wood door and window frames, BOSTIK S80 SILICONE adheres well to both porous and non-porous substrates while resisting cracking, shrinkage, discolouration, UV exposure, and extreme temperatures. It meets the requirements of BS EN 15651:2017 – Parts 1 and 2 for façade and glazing joint sealants and is 100% pure silicone, free from plasticisers.
Key Points:
– Neutral alkoxy cure silicone, low modulus and weather resistant
– Excellent adhesion to PVCu, PMMA, polycarbonate, aluminium, wood, and other substrates
– Resistant to cracking, shrinkage, discolouration, UV, and temperature extremes
– Suitable for interior and exterior glazing and façade joints, 100% plasticiser-free
PREPARATION
– Work in warm, well-ventilated conditions.
– Ensure all required materials are ready before starting.
– Joint surfaces must be clean, dry, sound, and free from dust, loose material, or other contaminants that may affect adhesion.
– If needed, apply masking tape along joint edges for a neat finish and to protect adjacent surfaces. Use a round-ended spatula to tool the sealant, ensuring excess is caught between the tape and joint.
– Perform a test run without applying sealant to familiarize yourself with challenging areas such as corners, behind taps, and raised joints.
APPLICATION
1. Unscrew the nozzle and carefully cut off the dome of the cartridge with a sharp knife without damaging the thread. Screw the nozzle onto the cartridge.
2. Cut the tapered end of the nozzle at a 45° angle to match the gap width.
3. Fit the cartridge into a sealant gun, pull out the plunger, and squeeze the trigger until the sealant appears.
4. Position the nozzle at the start of the gap, applying sealant evenly while maintaining contact with both sides of the joint. Release the trigger at the end of the run and press the plunger release to stop flow.
5. Ensure the joint depth is proportionate to the width to allow for movement between materials.
6. For joints up to 10 mm wide, use a 1:1 width-to-depth ratio, with a minimum of 5 mm. For joints wider than 10 mm, the depth should be the width divided by 3 plus 6 mm.
7. Smooth the sealant with a wet, round-ended tool within the working time. Remove excess with a cloth moistened with white spirit, then remove masking tape.
8. For damp or wet environments, tool the sealant to allow water runoff.
9. After use, clean the nozzle and replace the cap.
10. Sealant skins over in approximately 8–9 minutes and cures fully in ~24 hours, depending on bead width, temperature, and humidity.
CLEANING
Uncured Sealant: Remove excess carefully with a soft scraper, then wipe with a cloth moistened with white spirit or soapy water. Repeat with a clean cloth as needed.
Cured Sealant: No solvent can remove it. Cut away excess carefully with a very sharp knife. Do not use solvent on skin; use soap and water instead.
Regular Cleaning: To maintain appearance, clean regularly. Avoid bleach-based products, as these can damage the fungicidal additive.
PAINTABILITY
This silicone is not paintable. Use masking tape to protect adjacent surfaces from contamination during application.
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| Elementlength | |||||||
| up to 1,5 m |
up to 2,5 m |
up to 3,5 m |
up to 4,5 m |
up to 2,5 m |
up to 3,5 m |
up to 4,5 m |
|
| Type of window frame material |
Minimum witdth of joints for a butled mounting b in mm |
Minimum witdth of joints for a inner mounting b in mm |
|||||
| Hard PVC (white) | 10 | 15 | 20 | 25 | 10 | 10 | 15 |
| Hard PVC and PMMA (dark) (colour extruded) |
15 | 20 | 25 | 30 | 10 | 15 | 20 |
| Hard PUR integral foam | 10 | 10 | 15 | 20 | 10 | 10 | 15 |
| Wood-aluminium-window | 10 | 10 | 15 | 20 | 10 | 10 | 15 |
| Aluminium-plastic sandwich frame (bright) |
10 | 10 | 15 | 20 | 10 | 10 | 15 |
| Aluminium-plastic sandwich frame (dark) |
10 | 15 | 20 | 25 | 10 | 10 | 15 |
| Wooden window frame | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
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