Fire Safety Sealant – High-Performance Protection
KASTAR FS Fire Safety Sealant is a high-performance, intumescent solution designed to provide reliable fire protection by sealing joints, gaps, and penetrations in fire-rated walls, floors, and ceilings. Offering up to 4 hours of fire resistance, this sealant effectively prevents the spread of fire, smoke, and toxic gases, ensuring safety and structural integrity. Its advanced formula delivers excellent adhesion, flexibility, and durability, making it compatible with various materials such as concrete, steel, and wood. KASTAR FS is ideal for residential, commercial, and industrial applications, ensuring compliance with international fire safety standards.
Appearance: Smooth paste
Density (g/cm³): 1.58
Sagging properties (mm): 0
Shore A hardness (A°): 52
Tack free time (min): 110
Tensile strength (MPa): 2.3
KASTAR FS Fire Safety Sealant is the ultimate choice for fire protection in critical building applications, offering up to 4 hours of fire resistance to prevent the spread of fire, smoke, and toxic gases. This advanced “fire safety sealant” expands under extreme heat, sealing gaps and joints to ensure safety and structural stability. Its intumescent formula complies with international fire safety standards, providing peace of mind in both residential and commercial projects.
The sealant is compatible with a wide range of materials, including concrete, steel, and wood, and offers excellent adhesion and flexibility for dynamic joints. Its smooth, non-sagging consistency makes it easy to apply, ensuring clean, professional results in fire-rated walls, ceilings, and floors. KASTAR FS is durable, long-lasting, and an essential component in enhancing fire safety measures.
- Fire-Rated Walls & Ceilings: Seals gaps and joints in drywall and masonry assemblies.
- HVAC Ducts & Pipe Penetrations: Ensures fire-resistant sealing for mechanical and electrical openings.
- Structural Expansion Joints: Provides flexible sealing for fire-rated joints exposed to movement.
- Industrial & Commercial Spaces: Ideal for offices, factories, and warehouses requiring fire-rated protection.
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NO. | ITEM | DATA |
1 | Basic material | Intumescent Polymer |
2 | Color | White or Gray |
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 85℃ |
9 | Storage Temperature | 5℃ to 35℃ |
10 | Application Temperature | 5℃ to 40℃ |
11 | Skin Drying Time(mins) | 60 |
12 | Density | 1.58 |
13 | Shrinkage(mm) |
NO. | ITEM | DATA |
1 | Basic material | Intumescent Polymer |
2 | Color | White or Gray |
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 85℃ |
9 | Storage Temperature | 5℃ to 35℃ |
10 | Application Temperature | 5℃ to 40℃ |
11 | Skin Drying Time(mins) | 60 |
12 | Density | 1.58 |
13 | Shrinkage(mm) |

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