Sikasil®-670 Fire

FIRE RATED JOINT SEALANT

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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
 
Product Data Sheet Show all documents

Overview

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, 20 foil packs per box
300 ml cartridge, 12 cartridges per box

Colour

White, grey, black

Product Details

SUSTAINABILITY

  • LEED v4 EQc 2: Low-Emitting Materials

APPROVALS / CERTIFICATES

  • EN 15651-1 F EXT-INT 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 (ETAG 026)
  • UL listing (UL 2079)
  • EN 13501-2 classification report
  • EN 140-3

Composition

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)

Movement capability

± 25 %

(ISO 9047)

± 35 %(ASTM C 719)

Elastic recovery

~70 %

(ISO 7389)

Tear propagation resistance

~4.0 N/mm

(ISO 34)

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 must 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]

21010
41510
62010
83015
103517

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

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

Backing material

Use polyethylene foam backing rods.

Curing rate

~2 mm/24 hours (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 width [mm]

Joint depth [mm]

Joint length [m] per 600 ml foil pack

10106

15

10

4
20

10

3
25122
30151.3

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 EQUIPMENT

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.

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