Weatherproof Silicone Sealant for construction with High hardness Structural role
Description
SV-888 silicone weatherproof sealant is one component, neutral cure silicone sealant, designed for glass curtain wall, aluminum curtain wall and building exterior design, has excellent weathering properties, it can form durable and most building materials, waterproof and flexible interface.
Key Features
1. 100% silicone
2. Medium modulus (25% movement capability)
3. UV resistance & weatherproof
4. Primerless adhesion to most building materials
Basic Application
1.All kinds of glass curtain wall weatherproof seal
2.For metal (aluminum) curtain wall, enamel curtain wall weatherproof seal
3.Joint sealing of concrete and metal
4.Roof joint seal
Technical data sheet
| Test standard | Test project | Unit | value |
| Before curing——25℃,50%R.H. |
| GB13477 | Flow, sagging or vertical flow | mm | 0 |
| GB13477 | Operating time | min | 10 |
| GB13477 | surface drying time(25℃,50%R.H.) | min | 20 |
| | Deep curing | mm/day | 1-2 |
| Sealant curing speed and operating time will have different with different temperatures and temperature, high temperature and high humidity can make sealant curing speed faster, rather low temperature and low humidity are slower.21 days after curing——25℃,50%R.H. |
| GB13477 | Durometer Hardness | Shore A | 28 |
| GB13477 | The ultimate tensile strength | Mpa | 0.65 |
| | Temperature stability | ℃ | -50~+150 |
| GB13477 | Movement capability | % | 25 |
Certification
GB/T 22083-G-35；ASTM C920
CURE TIME
As exposed to air, SV888 begins to cure inward from surface. Its tack free time is about 50
minutes; the full and optimal adhesion depends on the sealant depth.
SPECIFICATIONS
SV888 is designed to meet or even exceed the requirements of:
Chinese national specification GB/T 14683-2003 20HM
STORAGE AND SHELF LIFE
SV888 should be stored at or below 27℃ in original unopened containers. It has a shelf life of 12 months from the date of manufacture.
LIMITATIONS
SV888 should not be applied:
For structural glazing
For weather seal for curtain walls
To underground joints
To joints with high movement
To the materials that bleed oils , plasticizers or solvents, such as impregnated wood ,or unvulcanized resin
In totally confined spaces as sealant requires atmospheric moisture for cure
To frost laden or damp surfaces
For continuous water immersion
When surface temperature below 4℃ or over 50℃
