Name: Electrically Conductive Silicone Sealant ECS-50
Brand: Coatingsink
SKU: electrically-conductive-silicone-sealant
Availability: PreOrder

Question 1

What filler loading gives ECS-50 its conductivity, and does silver migration occur over time?

Accepted Answer

ECS-50 uses a high loading of silver flake (typically 70–80 wt%) distributed in a polydimethylsiloxane matrix. The silver flakes form a continuous conductive network upon cure. Silver migration is negligible in a fully cured condensation-type silicone because the polymer matrix immobilizes the filler; resistivity drift over 1,000 hours at 85°C/85% RH is typically <20%.

Question 2

How should ECS-50 be applied to achieve consistent volume resistivity in a production EMI gasket?

Accepted Answer

Surface preparation is critical — degrease mating surfaces with isopropanol and allow full evaporation before dispensing. Apply a bead of 1–3 mm and compress to the target bondline thickness (0.5–1.5 mm recommended) within 10 minutes of application. Thicker bondlines increase bulk resistance; maintain consistent compression in production fixtures. Allow a minimum 24-hour ambient cure (or 1 hour at 80°C) before electrical testing.

Question 3

Is ECS-50 compatible with the condensation cure inhibition concerns seen with certain substrates?

Accepted Answer

Yes. Condensation-cure silicones can be inhibited by sulfur-containing rubbers, certain amine-cured epoxies, and organotin compounds. Avoid applying ECS-50 directly onto uncured polysulfide sealants or freshly amine-cured substrates. A 24-hour outgassing period or an intermediate primer resolves most adhesion and inhibition issues on problematic substrates.

Cure System	Condensation cure (RTV-1)
Shore A Hardness	30–40
Viscosity (25°C)	120,000–180,000 mPa·s
Volume Resistivity	< 0.01 Ω·cm
Operating Temperature	-55 to +200°C

Electrically Conductive Silicone Sealant ECS-50

Specifications

FAQ

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