Description
Transparent Silicone Protection That Keeps Electronics Repairable
STEP-S1 is a two-component, transparent silicone potting compound developed for electronic assemblies that require reliable insulation and environmental protection without sacrificing serviceability. Its highly elastic, low-hardness cured material can help protect sensitive components while allowing repair or rework when required.
The compound cures at room temperature through an addition-cure process using a platinum catalyst. Its convenient 1:1 mixing ratio supports straightforward preparation and application.
Key Benefits
- Transparent cured material for applications where component visibility matters.
- Very soft elastomer: Shore A hardness 10.
- Can help achieve protection up to IP68 when used in a properly designed and tested assembly.
- Simple 1:1 component mixing ratio.
- Wide operating temperature range: -60°C to +150°C.
- Working time: approximately 70–90 minutes at 23°C.
- No volatile substances released during curing, according to the manufacturer.
- High dielectric performance for electrical and electronic applications.
Typical Applications
- Potting and insulation of electronic assemblies.
- Protection of electrical connections and sensitive components.
- Repairable electronic modules requiring environmental protection.
Technical Specifications
| Material | Two-component silicone |
|---|---|
| Cure mechanism | Addition cure (platinum catalyst) |
| Mixing ratio | 1:1 |
| Working time | 70–90 min at 23°C |
| Brookfield dynamic viscosity | 5,000–7,000 mPa·s |
| Technological cure | 8–12 h at 20–25°C |
| Cold cure schedule | 48 h at 20–25°C |
| Operating temperature | -60°C to +150°C |
| Tensile strength | 0.7–0.9 MPa |
| Elongation at break | 280–310% |
| Hardness | 10 Shore A |
| Volume resistivity | ≥1.0 × 10¹³ Ω·cm |
| Dielectric strength | 15 kV/mm |
| Dielectric loss tangent at 1 MHz | 0.011 |
Application note: The manufacturer recommends using STEP-15 primer/undercoat to improve adhesion. Confirm compatibility and the required protection level through testing on the finished assembly.
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