Two part silicone sealant suited for the secondary seal in insulating glass units
Basic Uses
GUIBAO 882 Silicone Insulating Glass Sealant is specially designed for use as secondary sealant for insulating glass units.
Features
- Two part, neutral fast cure rate, suitable for factory application
- High level of tensile strength and mechanical properties
- Excellent adhesion to a wide range of substrates including coated glass, low -E glass, tempered glass, laminated glass, aluminum and steel spacers etc.
- Excellent weatherability and high resistance to ultra-violet radiation ,heat and humidity, and ozone
- Excellent resistance to temperature extremes, unaffected performance from -50 ºC to +150 ºC
- Good compatibility with other neutral silicone sealants
Colours
Part A (base) of GUIBAO 882 is available in white, part B (curing agent) in black, black color after mixing.
Packaging
GUIBAO 882 is available in kit: part A in 200L drums (net 180L), part B in 20L pails (net 18L).
Specification
GUIBAO 882 is designed to meet or even exceed the requirements of Chinese national specification GB/T 29755-2013.
Storage and Shelf Life
GUIBAO 882 should be stored in original unopened containers. It has a shelf life of 12 months from the date of manufacture.
Typical Properties
| Test Method |
Property |
Unit |
Standard |
Result |
| GB/T 13477 (ISO 7390) |
Slump |
mm |
≤3 |
0 |
| GB/T 13477 (ISO 9048) |
Extrudability (after 20 min.) |
s |
≤10 |
1.4 |
| GB/T 13477 (ASTM D 2377) |
Tack Free Time |
h |
≤3 |
1.0 |
| GB/T 531.1 (ISO 7619) |
Hardness |
Shore A |
30-60 |
47 |
| GB/T 13477 (ISO 8339) |
Tensile Strength |
MPa |
≥0.6 |
0.8 |
| GB 16776 |
Adhension Failure |
% |
≤10 |
0 |
| GB 16776 (ASTM C 792) |
Heat aging |
|
|
|
| Weight Loss |
% |
≤6 |
4.5 |
| Chalking |
|
Nil |
Nil |
| Cracking |
|
Nil |
Nil |
GB: Chinese National Standard
ASTM: American Society for Testing and Materials
ISO: International Standardization Organization
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 882, it is recommended that base and curing agent thoroughly mixed using a two-part silicone dispensing machine.
GUIBAO 882 should be mixed at a ratio of 9:1~11:1 base to curing agent by volume, or 11:1~13:1 base to curing agent by weight for optimal performance.
Lot matching of GUIBAO 882 base to curing agent is not required. Before use, it is recommended that curing agent be stirred to ensure the homogeneity of all components.
GUIBAO 882 part B curing agent will react with atmospheric moisture, therefore should not be exposed to air for prolonged periods of time.
Priming
Priming is not usually required when using GUIBAO 882. 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 joints 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.
Limitations
- GUIBAO 882 should not be applied:
- For structural glazing
- To the materials that bleed oils, plasticizers orsolvents, such as impregnated wood, oil-based caulks
- To frost laden or damp surfaces
- For continuous water immersion
- When surface temperature below 4ºC or over 50ºC
Safety Information
- GUIBAO 882 is a chemical product, not edible, no implantation into body and should be kept away from children.
- Cured silicone rubber can be handled without any risk to health.
- Should uncured silicone sealant contact with eyes, rinse thoroughly with water and seek medical treatment if irritation persists.
- Avoid prolonged exposure of skin to uncured silicone sealant.
- Good ventilation is necessary for work and cure places
Disclaimer
The information presented herein is offered in good faith and is believed to be accurate. However, because conditions and methods of using our products are beyond our control, this information should not be used in substitution for customer's tests to ensure that our products are safe, effective, and fully satisfactory for intended specific applications.
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