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SikaSeal®-641 Fire Coating

Fire protection cable coating

The Product is a water-based ablative coating developed for the fire protection of grouped or bundled electrical cables, cable trays and for cable penetration seals

  • High resistance to weathering, aging and chemicals
  • LOI > 95 %, no flame formation during burning, even in highest oxygen saturation
  • High thermal conductivity and current carrying capacity of electrical cables
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Usage

  • Prevents fire propagation along vertical and horizontal cable ways
  • For indoor and outdoor application
 

Advantages

  • High resistance to weathering, aging and chemicals
  • LOI > 95 %, no flame formation during burning, even in highest oxygen saturation
  • High thermal conductivity and current carrying capacity of electrical cables

Packaging

7 kg, 25 kg and 35 kg plastic drums

Colour

Off-white

Product Details

Sustainability / Certifications / Approvals

CERTIFICATES AND TEST REPORTS

  • FM Approval (FM 3971 and FM 4990)

  • IEC 60332 (Cat. A) and IEC 60331 test

  • Ampacity test (no derating)
Product Information

Composition

water-based thermoplastic resin

Shelf life

18 months from production date

Storage conditions

The Product must be stored in the original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.

Density

~1.4 kg/l

pH-Value

~8 at 20 °C

Viscosity

~50.000 mPa.s
Technical Information

Resistance to fire

Refer to the section 'Certificates and Test reports' or contact Sika Technical Services for specific information.

Thermal conductivity

0.69 W.m-1.K-1 at +25 °C

Electrical resistivity

23 °C / 50% RH

Ρ = 1.06 x 107 Ω.m

23 °C / 83% RH

Ρ = 4.10 x 103 Ω.m

Application

Application Information

Layer thickness

Coverage: 3.0 kg/m2 for level surface. For grouped cables or cables on trays allow 30 % more material considering the curved cable surfaces.

Recommended film thickness: ~2.5 mm WFT, resulting in ~1.6 mm DFT.

The effectiveness of the Product as a fire retardant coating is in direct relation to the film thickness.

Ambient air temperature

+5 °C min. / +40 °C max.

Curing time

~ 3 days (20 °C/65 % RH)
Application steps

SUBSTRATE PREPARATION

Extensive cleaning of cables is not required. However, thick layers of dust should be removed by vaccum cleaing, sweeping or washing iff with water. Heavy layers of grease or oil should be removed with dry rags. After cleaning, cables sould be allowed to dry before the application of the Product.

APPLICATION

IMPORTANT

Strictly follow installation procedures

Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions.

 

CLEANING OF EQUIPMENT

Clean tools and application equipment with water immediately after use.

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