Best Flexible PU Sealant for Strong, Lasting Bonds
KASTAR FP Flexible PU Sealant is a premium-grade, one-component polyurethane sealant designed for flexible and durable sealing applications in construction, automotive, and industrial projects. This advanced sealant offers excellent adhesion to materials such as concrete, metal, wood, and glass, while accommodating joint movement to prevent cracking or separation. Resistant to weather, UV rays, and temperature fluctuations, KASTAR FP is ideal for both indoor and outdoor use. Its smooth, non-sagging consistency ensures easy application and a professional-grade finish, making it the ultimate solution for sealing dynamic joints and surfaces.
Appearance: Smooth paste
Density (g/cm³): 1.34
Sagging properties (mm): 0
Shore A hardness (A°): 45
Tack free time (min): 70
Tensile strength (MPa): 6.0
KASTAR FP Flexible PU Sealant is engineered to deliver superior performance in sealing applications that require flexibility and durability. Its polyurethane-based formula ensures excellent adhesion to a variety of materials, including concrete, metal, and wood, making it perfect for sealing joints in construction, automotive, and industrial projects. This “flexible PU sealant” is highly resistant to weather, UV rays, and temperature extremes, ensuring long-lasting protection in harsh conditions.
With its ability to accommodate joint movement, KASTAR FP prevents cracking, separation, and water ingress, ensuring the structural integrity of sealed surfaces. Its smooth, non-sagging consistency allows for precise application on vertical and horizontal joints, providing a clean and professional finish. Whether used for expansion joints, façade sealing, or industrial applications, KASTAR FP is the ultimate solution for flexible and reliable sealing.
- Expansion Joints: Provides flexible sealing for dynamic joints in buildings and concrete structures.
- Façade Sealing: Ensures weatherproofing for curtain walls, windows, and external panels.
- Automotive Assembly: Bonds and seals vehicle components exposed to vibration and movement.
- Industrial Use: Suitable for sealing machinery and heavy-duty equipment joints.
| NO. | ITEM | DATA |
| 1 | Basic material | Polyurethane Polymer |
| 2 | Color | White, Gray, or Black |
| 3 | Consistency | Paste |
| 4 | Application Consistency | Caulking Gun |
| 5 | Net Weight | 600 ml |
| 6 | Average Nonvolatile(FSTM 9A) | 92% |
| 7 | Temperature Resistance | -20℃ to 120℃ |
| 8 | Service Temperature limits | -10℃ to 100℃ |
| 9 | Storage Temperature | 5℃ to 35℃ |
| 10 | Application Temperature | 5℃ to 40℃ |
| 11 | Skin Drying Time(mins) | 70 |
| 12 | Density | 1.34 |
| 13 | Shrinkage(mm) | 0 |
| 14 | Tack free time（min） | 70 |
| 15 | Curing rate(2mm/h) | 24 hours |
| 16 | Solid content (%) | 92 |
| 17 | Shelf life | 12 months |
| NO. | ITEM | DATA |
| 1 | Basic material | Polyurethane Polymer |
| 2 | Color | White, Gray, or Black |
| 3 | Consistency | Paste |
| 4 | Application Consistency | Caulking Gun |
| 5 | Net Weight | 600 ml |
| 6 | Average Nonvolatile(FSTM 9A) | 92% |
| 7 | Temperature Resistance | -20℃ to 120℃ |
| 8 | Service Temperature limits | -10℃ to 100℃ |
| 9 | Storage Temperature | 5℃ to 35℃ |
| 10 | Application Temperature | 5℃ to 40℃ |
| 11 | Skin Drying Time(mins) | 70 |
| 12 | Density | 1.34 |
| 13 | Shrinkage(mm) | 0 |
| 14 | Tack free time（min） | 70 |
| 15 | Curing rate(2mm/h) | 24 hours |
| 16 | Solid content (%) | 92 |
| 17 | Shelf life | 12 months |
KASTAR 281 Acrylic Liquid Nail – Strong & Reliable Formula
