Colours
GUIBAO 557 silicone sealant is available in black, gray, white and other customized colours.
Specifications
GUIBAO 557 is designed to meet or even exceed the requirements of Chinese national specification of GB/T 14683-Gn-20HM.
Shelf Life
GUIBAO 557 should be stored in original unopened containers. It has a shelf life of 12 months from the date of manufacture.
Limitations
GUIBAO 557 should not be applied:
For structural glazing
For weather seal for curtain walls
For underground joints
For high-movement joints
For the materials that bleed oils, plasticizers or solvents, such as impregnated wood, unvulcanized resin
In totally confined spaces as sealant requires atmospheric moisture for cure
For frost-laden or damp surfaces
For continuous water immersion
When surface temperature below 4℃ or over 50℃
Safety Information
GUIBAO 557 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 attention if eye irritation persists.
Avoid prolonged exposure of skin to uncured silicone sealant.
Good ventilation is necessary for work and cure places.
Packaging
GUIBAO 557 is available in kit: Part A in 200Ldrums (net 190L), part B in 20L pails (net 19L).
For more details, please download: GUIBAO 557 high performance silicone structural sealant
These values are not intended for use in preparing specifications.
| Test Method | Property | Standard | Result |
| GB/T 13477 (ISO 7390) | Slump(vertical) | ≤3 mm | 0 mm |
| GUIBAO /T 13477 (ISO 8394 | Extrusion rate | ≥80 ml/min | 415 ml/min |
| GB/T 13477 (ASTM D 2377) | Tack free time | ≤3 h | 0.8 h |
| GB/T 13477 (ISO 7389) | Extension recovery | ≥80 % | 86% |
| GB/T 13477 (ISO 10563) | Weight loss | ≤8 % | 6% |
| GB/T 13477 (ISO 8339) | Tensile modulus | ＞0.4 Mpa | 0.7 MPa |
| GB/T 13477 (ISO 11600) | Movement capability | 20% | 20% |
| JC/T 485 | Adhesion after UV exposure | No Failure | |
| GB/T 13477(ISO 8340) | Adhesion at fixed stretch | ||
| GB/T 13477(ISO 9047) | Adhesion after heat contract and cold extension | ||
| GB/T 13477(ISO 10590) | Adhesion after water immersion | ||
*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.
Read MoreSurface 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.
Application Method
Mask areas adjacent to joints to ensure neat sealant lines. Apply GUIBAO 557 in a continuous operation using dispensing guns. Before a skin forms, tool the sealant with light pressure to spread the sealant against the joint surfaces. Remove masking tape as soon as the bead is tooled.
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 specific applications
Technical Services
Complete technical information and literature, adhesion testing, and compatibility testing are available from GUIBAO.
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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