Sikasil®-670 Fire
FIRE RATED JOINT SEALANT
Sikasil®-670 Fire is a fire rated, 1-component, moisture-curing, low-modulus elastic joint sealant.
- 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.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.
380 ml cartridge, 25 cartridges per box.
300 ml cartridge, 12 cartridges per box.
Colour
White, grey, black
Product Details
ENVIRONMENTAL INFORMATION
- LEED v4 EQc 2: Low-Emitting Materials.
APPROVALS / STANDARDS
- EN 15651-1 F EXT-INT CC 25 LM.
- EN 15651-2 G CC 25 LM.
- EN 15651-4 PW INT.
- ISO 11600 F 25 LM & G 25 LM.
- ASTM C 920, class 35.
- EN 1366-4 assessment report.
- ETA-23/0134 (EAD 350141-00-1106).
- UL listing (UL 2079).
- EN 13501-1 classification report.
- EN 140-3.
Chemical Base
Neutral cure silicone
Shelf Life
Sikasil®-670 Fire has a shelf life of 12 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 (after 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
| ± 25 % | (ISO 9047) |
| ± 35 % | (ASTM C 719) |
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 ≤ 40 mm. The joint depth shall be ≤ 20 mm. A width to depth ratio of 2:1 should be maintained (for exceptions, see table below).
Standard joint widths for joints between concrete elements:
| Joint distance [m] | Min. joint width [mm] | Min. joint depth [mm] |
| 2 | 10 | 10 |
| 4 | 15 | 10 |
| 6 | 20 | 10 |
| 8 | 30 | 15 |
| 10 | 35 | 17 |
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 larger joints please contact our Sika® Technical Service.
Application
Backing Material
Use polyethylene foam backing rods.
Sag Flow
| ~2 mm (20 mm profile, 50 °C) | (ISO 7390) |
Ambient Air Temperature
+5 °C min. / +40 °C max.
Substrate Temperature
+5 °C min. / +40 °C max., min. 3 °C above dew point temperature
Curing Rate
| ~2 mm/24 hours (23 °C / 50 % r.h.) | (CQP 049-2) |
Skin 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 width [mm] | Joint depth [mm] | Joint length [m] per 600 ml foil pack |
| 10 | 10 | 6 |
| 15 | 10 | 4 |
| 20 | 10 | 3 |
| 25 | 12 | 2 |
| 30 | 15 | 1.3 |
SUBSTRATE PREPARATION
The substrate must be clean, dry, sound and homogeneous, free from oils, grease, dust and loose or friable particles. Sikasil®-670 Fire adheres without primers and/or activators
CLEANING OF TOOLS
Clean all tools and application equipment immediately after use with Sika® Remover-208. Once cured, resi-
dual material can only be removed mechanically.
For cleaning skin use Sika® Cleaning Wipes-100.