GUIBAO 668 Silicone Sealant for Concrete Joints
GUIBAO 668 Silicone Sealant for Concrete Joints is a one-part, ready-to-use silicone sealant for concrete pavement joints. It helps seal joints while allowing the concrete to expand, contract and move. Therefore, contractors can consider this concrete joint sealant for suitable roads, bridges, airports, warehouses and parking areas.
Moreover, GUIBAO 668 offers good application flow and excellent adhesion to concrete without a primer under suitable conditions. You can apply it by hand or use an air-powered pump. However, concrete surfaces vary, so always test adhesion before starting a large project.
What Is GUIBAO 668 Concrete Joint Sealant?
GUIBAO 668 is a construction silicone sealant that helps protect concrete joints against weather exposure. When moisture in the air reaches the applied sealant, the product cures at room temperature and forms elastic silicone rubber. As a result, the cured sealant can accommodate joint movement within its stated limits.
Unlike a rigid filler, this flexible pavement sealant can stretch and compress as a joint moves. For this reason, it suits specified concrete joint applications where flexibility and weather protection matter.
Key Features of GUIBAO 668 Silicone Sealant
- One-part formula: Use the product as supplied without mixing separate components.
- Easy application: Apply it by hand or with an air-powered pump.
- Concrete adhesion: The manufacturer reports excellent adhesion without primer on concrete, although surface conditions can affect results.
- High movement capability: The datasheet states a movement capability of +100% to -50%.
- Low modulus: The sealant stretches with relatively little force, helping it follow joint movement.
- Elastic recovery: After stretching or compression within its rated limits, the cured sealant can recover its shape.
- Weather resistance: The product supports long-term weather sealing in suitable concrete joints.
- Colour options: Choose from black, grey and customized colours, subject to availability.
Applications of GUIBAO 668 Pavement Sealant
Concrete Pavements and Highways
GUIBAO 668 seals transverse, longitudinal, centre-line and shoulder joints in concrete pavement. In addition, contractors can consider it for suitable highway joints where the project design matches the product’s specifications.
Airport Pavements
Concrete airport pavements contain joints that need suitable sealing systems. GUIBAO 668 serves specified concrete pavement applications in airports. However, always check the project specification before selecting the sealant.
Bridges and Concrete Structures
Concrete bridges and other structures may need flexible joint seals. GUIBAO 668 can suit specified applications where the joint design and site conditions meet the manufacturer’s requirements. Therefore, review the technical data before use.
Warehouses, Parking Lots and Stadiums
Concrete floors, parking areas, warehouses and stadiums often contain expansion or contraction joints. GUIBAO 668 can seal suitable joints in these settings. However, correct joint design and surface preparation remain essential for reliable performance.
New and Existing Concrete Construction
The manufacturer lists GUIBAO 668 for both new concrete construction and repairs to older concrete joints. For new concrete, allow at least 28 days of curing and drying under the conditions stated in the datasheet. Meanwhile, remove old sealant and clean existing joints before applying the new product.
GUIBAO 668 Technical Specifications
| Property | Specification |
|---|---|
| Product name | GUIBAO 668 |
| Product type | One-part silicone sealant |
| Main application | Concrete pavement and joint sealing |
| Pack shown | 590ml sausage |
| Other listed packaging | 25kg pail |
| Available colours | Black, grey and customized colours |
| Tack-free time | 60 minutes |
| Extrusion rate | 180ml/min |
| Hardness | 30 Shore A |
| 100% modulus | 0.4 MPa |
| Elongation at break | 600% |
| Movement capability | +100% / -50% |
| Manufacturer | Chengdu Guibao Science and Technology Co., Ltd. |
How to Prepare Concrete Joints
Good preparation helps the sealant bond to concrete. For this reason, clean the joint and follow the manufacturer’s application guide before you begin.
- Clean the joint: Remove dust, debris, saw-cutting residue and old sealant from the joint faces.
- Check the surface: Make sure the concrete is clean, dry and free from frost.
- Fit a backer rod: Where the joint design requires one, use a suitable backing rod to control sealant depth and prevent unwanted three-sided adhesion.
- Check joint dimensions: Follow the manufacturer’s recommended joint width, depth and recessed finish.
- Apply the sealant: Move the nozzle steadily along the joint to form a uniform bead.
- Finish the joint: Tool the sealant before a skin forms, and keep it recessed below the pavement surface as directed in the application guide.
Important Application Limits
- Do not apply GUIBAO 668 in fully confined spaces because it needs moisture from the air to cure.
- Do not apply it to damp or frost-covered concrete.
- Keep the substrate temperature between 4°C and 40°C, as stated in the datasheet.
- Allow new concrete to cure and dry for at least 28 days under the conditions stated by the manufacturer.
- Keep the sealant bead below the pavement surface to help protect it from traffic and snow-removal equipment.
- Test adhesion before large-scale work because concrete quality and surface cleanliness can vary.
Buy GUIBAO 668 Concrete Joint Sealant in Pakistan
Looking for GUIBAO 668 silicone sealant in Pakistan? Explore the product listing on 7Mart to check the pack size, colour options and current availability. This concrete pavement sealant serves specified joint applications in roads, airports, bridges, warehouses and parking areas.
Before ordering, confirm the required pack size and colour. Also, compare the product’s technical specifications with your project requirements. For specialist work, consult the manufacturer’s technical team before application.
Need a concrete joint sealant for your project? Browse GUIBAO 668 on 7Mart and review its specifications before choosing the right product for your application.
Frequently Asked Questions About GUIBAO 668
What is GUIBAO 668 used for?
GUIBAO 668 seals specified concrete pavement joints, including transverse, longitudinal, centre-line and shoulder joints. It also serves suitable joints in highways, airports, bridges, warehouses, parking lots and stadiums.
Can GUIBAO 668 seal concrete expansion joints?
Yes. The manufacturer lists GUIBAO 668 for suitable concrete extension and contraction joints. However, check the joint dimensions, expected movement and site conditions before use.
What is the movement capability of GUIBAO 668?
The datasheet states a movement capability of +100% to -50%. Nevertheless, this rating does not replace proper joint design. Follow the manufacturer’s application guide for the project.
Does GUIBAO 668 need a primer on concrete?
The manufacturer reports excellent adhesion to concrete without primer. However, concrete surfaces differ, so conduct an adhesion test before large-scale application.
What packaging does GUIBAO 668 come in?
The datasheet lists 590ml sausage packs and 25kg pails. This listing features the 590ml pack, so confirm current availability before ordering.
Which colours are available?
The manufacturer lists black, grey and customized colours. However, the colours available for purchase may vary, so confirm your preferred option before ordering.
How long does GUIBAO 668 take to become tack-free?
The datasheet gives a typical tack-free time of 60 minutes. This value does not represent full curing time. Actual results can vary with site conditions, so consult the technical datasheet for planning.
Where can I buy GUIBAO 668 in Pakistan?
You can visit the GUIBAO 668 product page on 7Mart to check current availability, packaging details and ordering information.
Safety and Product Guidance
Wear gloves when applying GUIBAO 668, and keep the work area well ventilated. Also, keep the product away from children and follow the manufacturer’s safety instructions.
If uncured sealant gets into your eyes, rinse them thoroughly with water. Seek medical advice if irritation continues. Finally, consult the latest technical datasheet and application guide before starting work, because the concrete surface, joint design and site conditions affect product suitability.
