Colours
GUIBAO 4808 part A is available in white or black fluid, and part B in clear or shallow yellow liquid. It is white or black fluid after mixing.
Packaging
GB4808 is available in kits: Part A in plastic pails (12kg), part B in plastic pails (2kg); or Part A in plastic pails (3kg), part B in plastic cartridges (300ml, 0.5kg).
For more details, please download: GUIBAO 4808 Silicone Electronic Potting Sealant
These values are not intended for use in preparing specifications.
| Test Method | Property | Unit | Result | |||
| As supplied | ||||||
| / | Appearance | Part A: white fluid Part B: shallow yellow liquid | ||||
| GB/T 2794 | Viscosity as mixed at 25 ℃ | mPa•s | 2500~5500 | |||
| GB/T 13477 | Density | g/m³ | 1.36~1.42 | |||
| / | Working time | min. | ≤30 | |||
| / | Curing time | h | ≤24 | |||
| Cured after 7 days at 23±2℃，RH 50±5% | ||||||
| GB/T 531.1 | Hardness | Shore A | 35~50 | |||
| GB/T 528 | Tensile strength | MPa | ≥1.0 | |||
| GB/T 1692 | Volume resistivity | Ω·cm | ≥1×10^14 | |||
| GB/T 1695 | Dielectric breakdown strength | kV/mm | ≥18 | |||
| GB/T 1693 | Dielectric constant（1MHz） | ≤3.5 | ||||
| ISO 22007-2 | Thermal conductivity | W/m·K | ≥0.4 | |||
*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 are available from GUIBAO.
Read MoreMix part A base to Part B curing agent at a ratio of 6:1 by weight or 4:1 by volume, and then pot the mixture into the parts of substrates where needed, place at room temperature for initial curing for about 2～4 hours before conducting the next procedure. If precipitation occurs in Part A, just stir it well before use, and this does not affect the performance of the sealant.
When using automatic dispensing machine, set at a ratio of 6:1 by weight or 4:1 by volume of part A to Part B for a test first and then put into use.
Chengdu Guibao Science and Technology Co., Ltd. (GUIBAO), a company established since 1998, is the leader of China silicone sealant industry. It is located in the Sichuan province where the China silicon industry is congregated. GUIBAO specializes in the manufacturing of silicone sealants, specialty equipment for the production of sealant, with the expertise to create models for the industrial manufacture of silicone sealant.
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