Product Profile of 1-part Silicone Weather Seal

McCoy Silicones Limited offers 1-Part Silicone Weather seal, Sikasil® WS-305. McCoy Silicones Limited is an ISO 9001:2000 Certified Company. The 1-Part Silicone Weather seal is a neutral, 1-part, moisture curing, elastic joint sealant based on silicone. The 1-Part Silicone Weather seal is a high-performance silicone sealant. This 1-Part Silicone Weather seal is specially designed for sealing, bonding and mending tasks in glazing applications. It is particularly suitable for structural glazing and curtain walling. The 1-Part Silicone Weather seal is also suitable for used on alkaline substrates such as concrete and mortar.
The 1-Part Silicone Weather seal has the following characteristics and advantages:

• Non-sag

• Solvent less

• Neutral curing system

• Ready to use

• Rapid curing

• Low shrinkage on curing

• After cure: elastic at low [-40°C] and high [+150°C] temperatures

• Bonds to many materials without primer

• Outstanding UV and weathering resistance

• Not corrosive to metals

• External quality control

• Wide range of colors

• Long shelf-life: simplified stock-keeping

• Ready gunnability at low [+5°C] and high [+40°C] temperatures

• Compatible with water-based and solvent-based paints: no migration of plasticizer

• The 1-Part Silicone Weather seal is available in following packages:
310 ml cartridges, 25 cartridges per box 300 ml cartridges, 25 cartridges per box 600 ml sausages, 20 sausages per box Other packaging, e.G., for industrial applications, can be supplied on request. The technical specifications of the 1-Part Silicone Weather seal are: Skinning Time 20 minutes [+23°C / 50% r.H.] Tack-free Time 180 minutes Curing Rate 4 mm / 24 h [+23°C / 50% r.H.] Movement Capability ± 25% [ISO 11600] ± 50% [ASTM C920] Density 1.03 kg/l [transparent, aluminum] [ISO 1183-B] 1.49 kg/l [all other colors] Service Temperature -40°C to +150° C [after vulcanisation] Joint Dimensions 6 mm min. Width / 40 mm max. Width Sag Flow Non-sag [ISO 7390, Profile U20] The mechanical properties of the 1-Part Silicone Weather seal are: E-Modulus 0.33 N/mm2 at 100% elongation after 4 weeks [+23°C / 50% r.H.] [ISO 37, rod S2] 0.30 N/mm2 at 100% elongation after 4 weeks [+23°C / 50% r.H.] [ISO 8339-A]
Tear Strength 4.0 N/mm after 4 weeks [+23°C / 50% r.H.] [ISO 34-C]
Shore A Hardness 20 after 4 weeks [+23°C / 50% r.H.] [ISO 868]
Elongation at Break 820% after 4 weeks [+23°C / 50% r.H.] [ISO 37, rod S2] 380% after 4 weeks [+23°C / 50% r.H.] [ISO 8339-A]

• Tensile Strength
0.90 N/mm2 after 4 weeks [+23°C / 50% r.H.] [ISO 37, rod S2] 0.50 N/mm2 after 4 weeks [+23°C / 50% r.H.] [ISO 8339-A]