Sikasil®-670 Fire
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.
- Up to 4 hours 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
Usage
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.Advantages
- Up to 4 hours 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
Packaging
600 mL foil pack, 12 foil packs per box
300 mL cartridge, 12 cartridges per box
Colour
White, grey, black
Product Details
SUSTAINABILITY
- Sikasil®-670 Fire conforms to LEED v4 EQc 2: Low-Emitting Materials
- Sikasil®-670 Fire is certified according "Low Emitting Materials as per Al Sa'fat - Dubai Green Building Evaluation System" by Dubai Central Laboratory (DCL) certificate No. CL1802058
- SCAQMD, Rule 1168
- BAAQMD, Regulation 8, Rule 51
APPROVALS / CERTIFICATES
- Dubai Civil Devence (DCD), Certificate No.: CF 5462
- ASTM C 920, class 35
- EN 15651-1 F EXT-INT CC 25 LM
- EN 15651-4 PW INT
- ISO 11600 F 25 LM & G 25 LM
- EN 1366-4 assessment report
- ETAG 026 assessment report
- EN 13501-2 classification report
- EN 140-3
- EN 13501-1 class B-s2-d0
Composition
Neutral cure silicone
Shelf life
Sikasil®-670 Fire has a shelf life of 10 months from the date of production, if it is stored in undamaged, original, sealed packaging, and if the storage conditions are met.
Storage conditions
Sikasil®-670 Fire shall be stored in dry conditions, where it is protected from direct sunlight and at temperatures between +5 °C and +25 °C.
Density
| ~1.35 kg/l | (ISO 1183-1) |
Shore A hardness
| ~20 (28 d) | (ISO 868) |
Secant tensile modulus
~0.30 N/mm2 at 100 % elongation (23 °C) | (ISO 8339) |
| ~0.50 N/mm2 at 100 % elongation (−20 °C) |
Elastic recovery
~70 % | (ISO 7389) |
Tear propagation resistance
~4.0 N/mm | (ISO 34) |
Movement capability
| ± 35 % | (ASTM C 719) |
| ± 25 % | (ISO 9047) |
Service temperature
−40 °C min. / +150 °C max.
Joint design
The joint width must be designed to suit the joint movement required and the movement capability of the sealant. The joint width shall be ≥ 10 mm and ≤ 50 mm. The joint depth shall be ≤ 20 mm. A width to depth ratio of 2 : 1 must be maintained (for exceptions, see table below).
Standard joint widths for joints between concrete elements:
(Movement Capability: ± 35 % (ASTM C719) and ΔT: 80 °C)
| Joint distance [m] | Min. joint width [mm] | Min. joint depth [mm] |
| 2 | 10 | 10 |
| 4 | 12 | 10 |
| 6 | 18 | 10 |
| 8 | 22 | 11 |
| 10 | 28 | 14 |
For larger joints following depth should be maintained:
| Joint width [mm] | Joint depth [mm] |
| 30 | 15 |
| 35 | 18 |
| 40 | 20 |
| 45 | 20 |
| 50 | 20 |
All joints must be correctly designed and dimensioned in accordance with the relevant standards, before their construction. The basis for calculation of the necessary joint widths are the type of structure and its dimensions, the technical values of the adjacent building materials and the joint sealing material, as well as the specific exposure of the building and the joints.
For more detailed advice and instructions please contact our Technical Department.
Application
Backing material
Use closed cell, polyethylene foam backing rods.
Sag flow
2 mm (20 mm profile, 50 °C) | (ISO 7390) |
Ambient air temperature
+5 °C min. / +40 °C max. (min. 3 °C above dew point temperature)
Substrate temperature
+5 °C min. / +40 °C max.
Curing rate
~2 mm/24 h (23 °C / 50 % r.h.) | (CQP 049-2) |
Skinning time
~25 min (23 °C / 50 % r.h.) | (CQP 019-1) |
Tooling time
| ~20 min (23 °C / 50 % r.h.) | (CQP 019-2) |
Consumption
| Joint length [m] per 600 mL foil pack | Joint width [mm] | Joint depth [mm] |
| 6 | 10 | 10 |
| 4 | 15 | 10 |
| 3 | 20 | 10 |
| 2 | 25 | 12 |
| 1.3 | 30 | 15 |
| 1 | 35 | 18 |
| 0.8 | 40 | 20 |
| 0.7 | 45 | 20 |
| 0.6 | 50 | 20 |
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 aluminium 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 preformed prior to application. For more detailed advice and instructions please contact our Technical Departement.
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.
CLEANING OF EQUIPMENT
Clean all tools and application equipment immediately after use with Sika® Remover-208 and/or Sika® TopClean T. Once cured, residual material can only be removed mechanically.