Sikaflex-821 FR, Fire-Rated Interior Sealant for Rail Use, Interior, Black, 600 mL
SIKA
Sika is a global leader in specialty chemicals for the construction and industrial sectors. The company develops and supplies innovative products and systems for bonding, sealing, damping, reinforcing, and protecting structures. With a strong focus on sustainability and performance, Sika serves a wide range of applications including concrete production, waterproofing, roofing, flooring, and structural strengthening.
Read more| Fire-rated interior sealant for rail applications Sikaflex-821 FR is an elastic 1-component polyurethane fire-retardant sealant that cures on exposure to atmospheric humidity. It is used for internal joints in the rail industry where the hazard level HL1 or HL2 of the European rail fire standard EN 45545-2 is required.
| |||||||||||||||||||||||||||||||||||||||||||||||
PRODUCT BENEFITS
UsageSikaflex-821 FR is designed for interior sealing applications in the railway industry where special fire-protection requirements acc. EN45545-2 apply. It can be used on a wide variety of substrates and is suitable for permanent elastic seals. Suitable substrate materials are metals, metal primers and paint coatings (2-component systems), ceramic materials and plastics. Seek manufacturer’s advice and perform tests on original substrates before using Sikaflex-821 FR on materials prone to stress cracking. This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.Packaging
| |||||||||||||||||||||||||||||||||||||||||||||||
Typical Product Data
| |||||||||||||||||||||||||||||||||||||||||||||||
Technical Information CURE MECHANISM Sikaflex-821 FR cures by reaction with atmospheric moisture. At low temperatures the water content of the air is generally lower and the curing reaction proceeds somewhat slower (see diagram 1). Diagram 1: Curing speed Sikaflex-821 FR CHEMICAL RESISTANCE Sikaflex-821 FR is generally resistant to fresh water, seawater, diluted acids and diluted caustic solutions; temporarily resistant to fuels, mineral oils, vegetable and animal fats and oils; not resistant to organic acids, glycolic alcohol, concentrated mineral acids and caustic solutions or solvents. | |||||||||||||||||||||||||||||||||||||||||||||||
Application Information Surface Preparation Surfaces must be clean, dry and free from grease, oil, dust and contaminants. Application Sikaflex-821 FR can be processed between 10 °C and 35 °C (climate and product) but changes in reactivity and application properties have to be considered. The optimum temperature for substrate and sealant is between 15 °C and 25 °C. Consider the viscosity increase at low temperature. For easy application, condition the adhesive at ambient temperature prior to use. Sikaflex-821 FR can be processed with hand, pneumatic or electric driven piston guns. Tooling and finishing Tooling and finishing must be carried out within the skin time of the product. It is recommended using Sika Tooling Agent N. Other finishing agents must be tested for suitability and compatibility prior the use. Removal Uncured Sikaflex-821 FR can be removed from tools and equipment with Sika Remover-208 or another suitable solvent. Once cured, the material can only be removed mechanically. Hands and exposed skin have to be washed immediately using hand wipes such as Sika Cleaner-350H or a suitable industrial hand cleaner and water. Do not use solvents on skin. |
The above design is only a sample of the options available, for reference purposes only. Our policy of continuous improvement may result in a change of specifications without notice. If any discrepencies might be between the data sheet values and standards, we reserve the rights to make technical changes. Our company will not be held responsible, as all or any of pictures, drawings, weights and dimensions details or other elements in this document are only indicative and must not be considered contractual. Contact our sales team for other specifications or custom made products.
Contact our sales team for other specifications or custom made products.| Fire-rated interior sealant for rail applications Sikaflex-821 FR is an elastic 1-component polyurethane fire-retardant sealant that cures on exposure to atmospheric humidity. It is used for internal joints in the rail industry where the hazard level HL1 or HL2 of the European rail fire standard EN 45545-2 is required.
| |||||||||||||||||||||||||||||||||||||||||||||||
PRODUCT BENEFITS
UsageSikaflex-821 FR is designed for interior sealing applications in the railway industry where special fire-protection requirements acc. EN45545-2 apply. It can be used on a wide variety of substrates and is suitable for permanent elastic seals. Suitable substrate materials are metals, metal primers and paint coatings (2-component systems), ceramic materials and plastics. Seek manufacturer’s advice and perform tests on original substrates before using Sikaflex-821 FR on materials prone to stress cracking. This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.Packaging
| |||||||||||||||||||||||||||||||||||||||||||||||
Typical Product Data
| |||||||||||||||||||||||||||||||||||||||||||||||
Technical Information CURE MECHANISM Sikaflex-821 FR cures by reaction with atmospheric moisture. At low temperatures the water content of the air is generally lower and the curing reaction proceeds somewhat slower (see diagram 1). Diagram 1: Curing speed Sikaflex-821 FR CHEMICAL RESISTANCE Sikaflex-821 FR is generally resistant to fresh water, seawater, diluted acids and diluted caustic solutions; temporarily resistant to fuels, mineral oils, vegetable and animal fats and oils; not resistant to organic acids, glycolic alcohol, concentrated mineral acids and caustic solutions or solvents. | |||||||||||||||||||||||||||||||||||||||||||||||
Application Information Surface Preparation Surfaces must be clean, dry and free from grease, oil, dust and contaminants. Application Sikaflex-821 FR can be processed between 10 °C and 35 °C (climate and product) but changes in reactivity and application properties have to be considered. The optimum temperature for substrate and sealant is between 15 °C and 25 °C. Consider the viscosity increase at low temperature. For easy application, condition the adhesive at ambient temperature prior to use. Sikaflex-821 FR can be processed with hand, pneumatic or electric driven piston guns. Tooling and finishing Tooling and finishing must be carried out within the skin time of the product. It is recommended using Sika Tooling Agent N. Other finishing agents must be tested for suitability and compatibility prior the use. Removal Uncured Sikaflex-821 FR can be removed from tools and equipment with Sika Remover-208 or another suitable solvent. Once cured, the material can only be removed mechanically. Hands and exposed skin have to be washed immediately using hand wipes such as Sika Cleaner-350H or a suitable industrial hand cleaner and water. Do not use solvents on skin. |