GUIBAO 992 Silicone Structural Glazing Sealant
structural sealant, structural glazing, silicone structural sealant, building sealant
Basic Uses
GUIBAO 992 Silicone Structural Glazing Sealant is designed for
- Structural bonding and glazing applications for glass curtain walls, aluminium curtain walls, terracotta curtain walls and metal structures
- Structural secondary seal of insulating glass
- Other construction structural glazing applications
- Two parts , neutral cure to form an extremely tough elastomeric rubber ensuring a durable, flexible, and watertight bond
- Non-corrosive to metals, coated glass, low-E glass and many other substrates
- Excellent weatherability and high resistance to UV radiation ,heat and humidity, and ozone
- Excellent stability through wide temperature range from –50 ℃ to 150 ℃
- High level of mechanical properties
- Good compatibility with other neutral silicone sealants
Colours
Part A (base) of GUIBAO 992 is available in white, part B (curing agent) in black; Black colour after mixing.
Packaging
GUIBAO 992 is available in kit: part A in 200L, drums (net 190L), part B in 20L pails (net 19L).
For more details, please download:
These values are not intended for use in preparing specifications
| Test Method | Property | Unit | Standard | Result |
| GB/T 13477 (ISO 7390) | Slump | mm | ≤3 | 0 |
| GB/T 13477 (ASTM D 2377) | Tack free time | h | ≤3 | 0.8 |
| GB/T 13477 | Working time (after 20 min.) | s | ≤10 | 2.2 |
| GB/T 531.1 (ISO 7619) | Hardness | Shore A | 20～60 | 43 |
| GUIBAO 16776 (ASTM C 792) | Heat Aging | |||
| weight loss | % | ≤10 | 3.5 | |
| cracking | Nil | Nil | ||
| chalking | Nil | Nil | ||
| GB/T 13477 (ISO 8339) | Tensile strength | MPa | ||
| 23℃ | ≥0.60 | 1.13 | ||
| 90℃ | ≥0.45 | 1.02 | ||
| -30℃ | ≥0.45 | 1.3 | ||
| water immersion | ≥0.45 | 1.01 | ||
| water-UV exposure | ≥0.45 | 1.09 | ||
| adhesion failure | % | ≤5.00 | 0 | |
| Elongation at ultimate tensile strength at 23℃ | % | ≥100 | 140 |
*GB: Chinese National Standard
ASTM: American Society for Testing and Materials
ISO: International Standardization Organization
Complete technical information and literature, adhesion testing and compatibility testing results are available from GUIBAO.
Surface Preparation
Clean all joints removing all foreign matter and contaminants such as oil, grease, dust, water, frost, old sealants, surface dirt, or glazing compounds and protective coatings.
Mixing and Dispensing
To obtain the optimal performance of GUIBAO 992, it is recommended that base and curing agent thoroughly mixed using an airless two-part silicone dispensing machine.
GUIBAO 992 should be mixed at a ratio of 9:1～11:1 base to curing agent by volume or 14:1～16:1 base to curing agent by weight.
Priming
Priming is not usually required when using GUIBAO 992. But it is essential that adhesion is tested prior to use to decide whether to use primer or not.
Masking and Tooling
Areas adjacent to joint may be masked to ensure a neat sealant line. Do not allow mask tape to touch clean surfaces to which the silicone sealant is to adhere. Tooling should be completed in one continuous stroke after sealant application. Masking tape should be removed immediately after tooling.
Equipment Cleaning
When not being used, it is recommended that the dispensing equipment be purged either with the base component or flush with suitable solvent.
