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21 Tuas West Ave, Singapore 638435
SHARPIE MSC1-20 Roof Caulk NB-Q
a one-component, low-modulus modified silicone sealant specially developed for roof construction and metal cladding. It provides excellent adhesion to fluorine-coated steel sheets without primer, with outstanding weatherability, durability, and thermal resistance. The product is highly flexible, paintable, and fast curing, making it ideal for long-lasting roof joints and outdoor sealing applications.
Key Highlights
- Excellent adhesion to fluorine-color steel sheet (primerless)
- Low modulus, high elongation for roof joints
- Fast curing with short skin-over time
- Good paintability, no plasticizer migration
- Service temperature: -50°C to +150°C
- Available in multiple colors (White, Ivory, Silver, Grey, Black, Dark Red, Dark Blue, Dark Green, Dark Brown, Bluish Green)
- Storage life: 18 months (unopened, dry, shaded storage)
- JSIA F☆☆☆☆ rating (low emissions)
Technical Specifications
| Chemistry | Modified Silicone (MS Polymer) |
| Consistency | Paste |
| Density | ~1.27 g/ml |
| Viscosity | 300–500 Pa·s (23°C) |
| Service Temperature | -50°C to +150°C |
| Application Temperature | +5°C to +35°C |
| Tack-Free Time | ~35 minutes (23°C) |
| Extrudability | 3–5 sec (23°C) |
| Nonvolatile Content | ~93% |
| Hardness (Shore A) | 22 |
| Elongation at Break | ~375–440% |
| 50% Tensile Stress | 0.23–0.30 N/mm² |
| Maximum Tensile Stress | 0.81–1.25 N/mm² |
| Paintability | Good (compatible with acrylic, elastic, multi-layer finishes; not suitable for oil-based paints) |
| Colors | White, Ivory, Silver, Grey, Black, Dark Red, Dark Blue, Dark Green, Dark Brown, Bluish Green |
| Storage Life | 18 months in unopened packaging |
Packaging
| Format | Size | Units / Box | Notes |
|---|---|---|---|
| Cartridge | 320 ml | 10 per box (2 boxes per bale) | Colors: White, Ivory, Silver, Grey, Black, Dark Red, Dark Blue, Dark Green, Dark Brown, Bluish Green |
| Primer | 500 g can (P-50) | — | For porous substrates (e.g., concrete, ALC) |
