886 Silicone Structural Insulating Glass Sealant Special for the secondary seal of structural insulating glass units used for curtain wall
Details
886 Silicone Structural Insulating Glass Sealant
Special for the secondary seal of structural insulating glass units used for curtain wall
PRODUCT FEATURES
1.Two part, neutral fast cure rate, suitable for factory application
2. High level of tensile strength and mechanical properties
3. Good adhesion to a wide range of substrates including coated glass, low -E glass, tempered glass, laminated glass, aluminium and steel spacers etc.
4. Good weatherability and high resistance to ultra-violet radiation ,heat and humidity, and ozone
5. Good resistance to temperature extremes, unaffected performance from –50 ℃ to +150 ℃
6. Good unprimed adhesion to wide range of substrates
7. Good compatibility with other neutral silicone sealants
COLOURS
Part A (base) of 886 is available in white, part B(curing agent) in black, black color after mixture.
PACKAGING
886 is available in kit: part A base in 200Ldrums (net 190L), part B is available in 20L pails (net 18.5L)
Typical properties
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 (ISO 9048) | Extrusion rate | s | ≤10 | 1.9 |
GB/T 13477 (ASTM D2377) | Tack free time | h | ≤3 | 1.3 |
GB/T 13477 (ISO 8339) | Modulus at 10% extension | MPa | ≥0.15 | 0.22 |
GB/T 531 (ISO 7619 ) | Hardness | Shore A | 30～60 | 43 |
GB/T 13477 | Adhesion at 25% extension |
| No failure | No failure |
GB/T 13477 (ISO 8339) | Tensile strength at | MPa |
|
|
| 23℃ |
| ≥0.60 | 1.13 |
| 90℃ |
| ≥0.45 | 0.87 |
| -30℃ |
| ≥0.45 | 1.58 |
| water immersion |
| ≥0.45 | 1.03 |
| water-UV exposure |
| ≥0.45 | 0.98 |
GB 16776 (ASTM C 792) | Heat aging |
|
|
|
| weight loss | % | ≤6.00 | 3.4 |
| chalking |
| Nil | Nil |
| chalking |
| Nil | Nil |
STORAGE AND SHELF LIFE
886 should be stored at or below 27℃ in original unopened containers. It has a shelf life of months from the date of manufacture.
LIMITATIONS
886 should not be applied:
For structural glazing of glass units onto a metal frame.
992 two part structural silicone and 999 one part structural silicone are recommended for that application
To the materials that bleed oils , plasticizers or solvents, such as impregnated wood, oil-based caulks
To frost laden or damp surfaces
For continuous water immersion
When surface temperature below 4℃ or over 50℃
HOW TO USE
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
Lot matching of 886 base to curing agent is not required. Before use, it is recommended that curing agent be stirred to ensure the homogeneity of all components.
886 part B curing agent will react with atmospheric moisture, therefore should not be exposed to air for prolonged period of time.
To obtain the optimal performance of 886, it is recommended that base and curing agent thoroughly mixed using a two-part silicone dispensing machine.
886 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 weigh
