Sikasil®-670 Fire is a fire-rated, silicone-based, 1-component, UV-stable, moisture-curing, low-modulus elastic joint sealant. Suitable for use in hot and tropical climatic conditions.
Sikasil®-670 Fire is designed for fire-rated movement and connection joints on porous and non-porous substrates. It is also suited for use as a weather sealant for movement and connection joints in building envelopes.
CHARACTERISTICS / ADVANTAGES
- Up to 4 hours of fire resistance according to EN 1366-4
- Very good resistance to weathering
- Movement capability of ± 35 % (ASTM C 719)
- Easy to smooth and very good workability
- Good adhesion to many different substrates
- Neutral curing
APPLICATION INSTRUCTIONS SUBSTRATE PREPARATION
The substrate must be clean, dry, sound, and homogeneous, free from oils, grease, dust, and loose or friable particles. The following priming and/or pre-treatment procedures shall be followed:
Non-porous substrates Anodised aluminum and stainless steel have to be pre-treated using Sika® Aktivator-205, Sika® Aktivator- 100 or Sika® Cleaner P. Powder coated and PVDF coated metals have to be pre-treated using Sika® Aktivator-205. For details like application and flash-off times refer to the most recent Product Data Sheet of the respective pre-treatment product. Porous substrates Concrete, aerated concrete and cement based renders, mortars and bricks shall be primed using Sika® Primer-3 N or Sika® Primer-210. For details like application and flash-off times refer to the most recent Product Data Sheet of the respective pre-treatment product.
Adhesion tests on project-specific substrates must be performed prior to application. For more detailed advice and instructions please contact our Technical Department. Note: Primers are adhesion promoters. They are neither a substitute for the correct cleaning of a surface nor do they improve the strength of the surface significantly.
APPLICATION METHOD / TOOLSSikasil®-670 Fire is supplied ready to use. After the necessary substrate preparation, insert a suitable backing rod to the required depth and apply any primer if necessary. Insert a foil pack or cartridge into the sealant gun and extrude Sikasil®-670 Fire into the joint making sure that it comes into full contact with the sides of the joint and avoids any air entrapment. Sikasil®-670 Fire sealant must be firmly tooled against the joint sides to ensure adequate adhesion. It is recommended to use masking tape where exact joint lines or neat lines are required. Remove the tape within the skin time. Do not use tooling products containing solvents.
CLEANING OF EQUIPMENT
Clean all tools and application equipment immediately after use with Sika® Remover-208 and/or Sika® Top-Clean T. Once cured, residual material can only be removed mechanically.
- Safety Data Sheet (SDS)
- EN 13501-2 classification report
- ETAG 026 assessment report
- Brochure Sika Fire Protection Solutions
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