GF998 Fire Resistant Silicone Weatherproofing Sealant
Details
GF998 Fire Resistant Silicone Weatherproofing Sealant
1. Weatherproofing joint seal for the curtain wall with fire resistance requirement;
2. ±25% movement capacity
Features：
1.FV-0 class fire resistance ,the highest rate in China
2.Good weatherability, virtually unaffected by sunlight, rain, snow and ozone
3.Neutral cure – suitable for use on metals, coated glass, aluminium panels, terracotta panels, concrete materials, galvanized steel and many other substrates.
4.Extension/compression movement capability of up to ±25 percent of the original joint width
5.Good resistance to temperature extremes, stable and flexible over the temperature range from –50 to +150 ℃
6.Good unprimed adhesion to a wide variety of construction materials
7.Easy of application-ready to use as supplied
8.Good compatibility with other neutral silicone sealants
COLOURS
GF998 is available in black and gray
PACKAGING
GF998 is available in disposable cartridges (net 300ml) and sausages (net 590ml).
Typical properties：
These values are not intended for preparing specifications
Test Method | Property | Unit | Standard | Result |
GB/T 13477 (ISO 7390) | Slump | mm | ≤3 ≤3 | 0 0 |
GB/T 13477 (ISO 8394) | Extrusion rate | ml/min. | ≥80 | 842 |
GB/T 13477 (ASTM D2377) | Tack free time | h | ≤3 | 1.3 |
GB/T 13477 (ISO 7389) | Extension recovery | % | ≥80 | 96 |
GB 16776 | Weight loss | % | ≤10 | 4.0 |
GB/T 13477 (ISO 8339) | Modulus at 23℃ | MPa | ＞0.4 | 0.74 |
GB/T 13477 (ISO 11600) | Movement capability | % | ±25 | ±25 |
GB/T 13477 | Extension/compression rate | % | ±25 | ±25 |
GB/T 13477 | Adhesion at fixed stretch |
| No failure | No failure |
GB/T 13477 | Adhesion after heat contract and cold extension |
| No failure | No failure |
GB/T 13477 | Adhesion after water exposure |
| No failure | No failure |
GB/T 2408 | Fire resistance rate |
| FV-0 | FV-0 |
*GB: Chinese National Standard
STORAGE AND SHELF LIFE
GF998 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
GF998 should not be applied:
As structural sealant
To the materials that bleed oils , plasticizers or solvents, such as impregnated wood, oil-based caulks
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℃
To copper, zinc or lead coated surfaces
