PR-888 · Premium
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Premium Neutral Curtain Wall Weatherproof Sealant
Top-tier weatherproof sealant passing all three durability adhesion tests — maintained extension, after water immersion, and after cold-draw hot-compression cycling.
| Product Standard | GB/T 14683-2017 |
|---|---|
| Cure System | Neutral Cure |
| Packaging | 300mL cartridge, 590mL sausage |
| Shelf Life | 12 months from production date |
| Transport | Non-hazardous goods |
| Storage | Dry, ventilated, cool place |
Technical Data
| Density | 1.43 g/cm³ |
|---|---|
| Extrusion rate | 519 mL/min (min. 150) |
| Tack-free time | 1.2 h (max. 3) |
| Sag resistance (vertical) | 0 mm (max. 3) |
| Elastic recovery rate | 92% (min. 80) |
| Tensile modulus at 23°C | 0.9 MPa (>0.4 / >0.6) |
| Adhesion at maintained extension | No failure |
| Adhesion after water immersion | No failure |
| Adhesion after cold-draw / hot-compression | No failure |
| Mass loss rate | 4.2% (max. 8) |
Typical values obtained under laboratory conditions (23°C / 50% RH) and not intended for specification purposes. Tested to GB/T 14683-2017 — Report No. 2022MF117. Download the full test report on request.
Product Characteristics
- Passes all three durability adhesion tests: maintained extension, water immersion and cold-draw / hot-compression
- Highest tensile modulus in the weatherproof range — 0.9 MPa
- High extrusion rate of 519 mL/min for productive gunning
- 92% elastic recovery for dynamic facade joints
- Low mass loss rate of 4.2% — excellent heat ageing
- Non-corrosive neutral cure, wide substrate compatibility
Applications
- Curtain wall and facade perimeter sealing
- Premium exterior window and door systems
- Expansion joints in high-rise buildings
- Marine and coastal projects with high humidity
Limitations
- Not for structural bonding
- Not for oily or exuding surfaces
- Not for continuous water immersion
- Apply at 4°C to 50°C