Product Features & Benefits
My-T-Sil® 7789 silicone weatherproofing sealant is designed for sealing expansion and control joints, precast concrete panel joints, non-structural curtain wall mullion joints, stress cracks and joints in parapet walls Appearance Black/White/ Grey Paste Cure Neutral Specific Gravity @ 25±2°C 1.2 Viscosity Non-slump Skin over Time 10-15 minutes Tack Free Time 30-40 minutes Tensile Strength ASTM D412 ≥ 1 N/mm2 Elongation ASTM D412 ≥ 350 % Hardness (Durometer Shore A), ASTM D2240 30 – 40 Operating Temperature -55 to 180 °C
My-T-Sil® 7789 silicone weatherproofing sealant is designed for sealing expansion and control joints, precast concrete panel joints, non-structural curtain wall mullion joints, stress cracks and joints in parapet walls
| Appearance | Black/White/ Grey Paste |
| Cure | Neutral |
| Specific Gravity @ 25±2°C | 1.2 |
| Viscosity | Non-slump |
| Skin over Time | 10-15 minutes |
| Tack Free Time | 30-40 minutes |
| Tensile Strength ASTM D412 | ≥ 1 N/mm2 |
| Elongation ASTM D412 | ≥ 350 % |
| Hardness (Durometer Shore A), ASTM D2240 | 30 – 40 |
| Operating Temperature | -55 to 180 °C |


















