Fire Sealant for Doors – High-Performance Door Safety
KASTAR FD Fire Sealant for Doors is a high-performance, intumescent sealant specifically designed to provide fire-rated sealing for gaps and joints around fire doors. Offering up to 4 hours of fire resistance, this sealant prevents the spread of fire, smoke, and toxic gases, ensuring compliance with international fire safety standards. Its advanced formula delivers superior adhesion and flexibility, accommodating movement while maintaining its fire-resistant properties. Compatible with wood, metal, and composite materials, KASTAR FD is easy to apply and provides a smooth, durable finish that enhances the safety and functionality of fire-rated door assemblies.
Appearance: Smooth paste
Density (g/cm³): 1.56
Sagging properties (mm): 0
Shore A hardness (A°): 50
Tack free time (min): 100
Tensile strength (MPa): 2.1
KASTAR FD Fire Sealant for Doors is the ultimate “fire sealant for doors,” providing critical fire protection for door assemblies in residential, commercial, and industrial buildings. Its intumescent formula expands under high heat to seal gaps around fire doors, effectively blocking fire, smoke, and toxic gases. With up to 4 hours of fire resistance, it ensures compliance with international fire safety standards and enhances the overall safety of the building.
The sealant adheres to various materials, including wood, metal, and composites, delivering excellent flexibility to accommodate door movement without compromising its fire-resistant properties. Its smooth, non-sagging consistency allows for precise application and a professional finish. Durable and long-lasting, KASTAR FD is the perfect solution for enhancing the fire safety of door assemblies in high-risk areas.
- Fire-Rated Doors: Provides fire-resistant sealing for gaps and joints around door frames.
- Wooden & Composite Doors: Ensures safe and effective sealing for fire-rated wood and composite doors.
- Steel Doors: Delivers reliable fire protection for metal door assemblies.
- Commercial & Residential Spaces: Ideal for use in offices, warehouses, apartments, and public buildings.
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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) | 94% |
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) | 55 |
12 | Density | 1.56 |
13 | Shrinkage(mm) | 0 |
14 | Tack free time(min) | 100 |
15 | Fire Resistance | Up to 4 hours |
16 | Curing rate(2mm/h) | 24 hours |
17 | Solid content (%) | 96 |
18 | Shelf life | 18 months |
19 | Storage | Store in a cool, dry place away from direct sunlight. |
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) | 94% |
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) | 55 |
12 | Density | 1.56 |
13 | Shrinkage(mm) | 0 |
14 | Tack free time(min) | 100 |
15 | Fire Resistance | Up to 4 hours |
16 | Curing rate(2mm/h) | 24 hours |
17 | Solid content (%) | 96 |
18 | Shelf life | 18 months |
19 | Storage | Store in a cool, dry place away from direct sunlight. |

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