Bostik Professional S21 - Multi-Purpose Silicone Sealant - Acetoxy Silicone
Verified by manufacturer 3 months ago
EPD
Certificate type
EC1plus
Certificate type
Professional grade acetoxy silicone for façade, glazing and sanitary joints. Meets BS EN 15651:2017 Parts 1, 2 and 3; façade, glazing and sanitary joints.
Application
Acetoxy-based multi-purpose silicone sealant for façade, glazing and sanitary joints. Suitable for sealing joints comprising of painted timber, non-ferrous metals, tiles and baths, basins, shower trays and kitchen worktops.
Meets BS EN 15651:2017 Parts 1, 2 and 3; façade, glazing and sanitary joints.
Description
Professional grade acetoxy silicone. It is a multi-purpose grade, suitable for façade, glazing and sanitary joints.
Features and benefits:
- Meets BS EN 15651:2017 Parts 1, 2 and 3; façade, glazing and sanitary joints.
- Mould resistant formula and is resistant to cracking, shrinking and discolouration.
- Low modulus.
- UV and weather resistant.
- Interior and exterior use.
- Suitable for sealing joints comprising of painted timber, non-ferrous metals, tiles and baths, basins, shower trays and kitchen worktops.
- Supplied in a post-consumer recycled (PCR) cartridge.
- Certified to GEV-EMICODE® EC1+ for very low emissions.
General information
Color | White Grey Clear Black Brown |
Finish | Silicone |
Material | Silicone |
Shape | Formless |
Uniclass | |
CAWS | L20/80 Sealant joints L20/820 Sealant joints L40/250 Bead-fixed single glazing – tape and sealant L40/330 Bead-fixed single glazing – capping L10/810 Sealant joints L40/496 U-profiled double glazing L40/310 Bead-fixed single glazing – tape, sealant and trim N13/68 Sealant for pointing L40/495 U-profiled single glazing L10/75 Sealant joints L40/350 Bead-fixed single glazing – curing compound and trim L40/230 Bead-fixed single glazing – non-setting compound N13/580 Sealant for pointing |
Product range |
Specification data - Silicone construction joint sealants
Standard | Meets BS EN 15651:2017 Parts 1, 2 and 3. |
Third-party certification | GEV EMICODE® EC1 Plus; CE and UKCA Marked. |
Material | Acetoxy-based - unfilled 100% pure silicone. |
Class | BS EN 15651-1: F-EXT-INT-CC 20LM, |
Colour | White (30623036).Clear (30623039).Black (30623041).Brown (30623054).Grey (30623110). |
Fire performance | |
Fire resistance | No fire resistance. |
Reaction to fire | Class E. |
Fungicide | Contains Fungicide XS1 classification. |
Form | Soft gunnable paste. |
Odour | Typical sharp acid. |
Shore A hardness | Approx. 20. |
Shelf life | Up to 24 months. Guidance for specification option: Consult manufacturer for details. |
Modulus at 100% elongation | 0.4 N/mm². |
Application rate | 125 g/minute. |
Application temperature | +5 to +40°C. |
Curing time | 2 mm per 24 hours. |
Density | 1.05 g/mL. |
Elongation at break | 550%. |
Joint movement | 20%. |
Skin formation at 23°C and 50% Relative Humidity (RH) | 5–6 minutes. Guidance for specification option: Always tool sealant within the given skin formation time frame. |
Service temperature | -40 to +150°C. |
Tensile strength | 1.50 N/mm². |
Sustainability data
Contains Red List materials | No |
Country of material origin | Europe |
Country of product manufacture | Europe |
Material | Silicone |
Embodied carbonA1-A3 (production stage) as defined in BS EN 15804 | 6.82 kg CO₂ eq/kg |
Recyclability | For disposal instructions see separate Health and Safety Data Sheet for BOSTIK S21 SILICONE, available at www.bostik.com/uk |
Third party certifications
Third party certifications
EPD
Bostik S21 Silicone EPD
EC1plus
Bostik S21 Silicone GEV EMICODE EC1 Plus
EPD
Bostik Silicones EPD Group 2
Literature
Bostik S21 CE Declaration of Performance
Bostik S21 Silicone TDS
Bostik S21 UKCA Declaration of Performance
Bostik Professional Grade Sealants Brochure