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SilSo Lite 21025
SilSo Lite 21025
SilSo Lite 21025 – Fast-Cure, Self-Blowing Silicone Foam for Lightweight Electronics Potting
SilSo Lite 21025 is a two-component, platinum-cure, self-blowing silicone foam engineered for ultra-fast, low-pressure potting where weight reduction, thermal protection, and process efficiency are critical. Upon mixing, it expands 2–3× its dispensed volume via hydrogen gas generation, forming a closed-cell, opaque black foam with excellent flow and minimal internal pressure, ideal for sensitive electronics and complex assemblies.
With an ultra-fast 90-second gel time at 25°C, SilSo Lite 21025 is optimised for high-speed automated dispensing, enabling rapid cycle times in EV battery module production, PCB staking, and thermal insulation applications. Its hydrolytically stable, reversion-resistant chemistry ensures long-term reliability in harsh environments.
Video Link - SilSo Lite 21025 Silicone Foam Application
Key Features
- Self-blowing expansion – 2–3× volume increase without external blowing agents
- Ultra-fast gel time: 90 seconds at 25°C – ideal for high-throughput automation
- Low foam density: 0.4 g/cm³, reduces system weight vs. solid silicones
- Low-pressure rise – minimises stress on delicate components during foaming
- Excellent flowability – fills intricate geometries before gelation
- UL 94 V-0 rated – meets flammability requirements for electronics
- Primerless adhesion – bonds directly to many substrates without surface treatment
Typical Applications
- High-speed potting of EV battery modules and power electronics
- PCB staking and component fixation require rapid handling strength
- Thermal and acoustic insulation in automotive and aerospace systems
- Encapsulation, where minimal cure pressure and fast demold are essential
Technical Notes
- Mix ratio: 1:1 by volume (1.17:1 by weight)
- Mixed viscosity: 17,000 cP
- Cured colour: Opaque black
- Max service temperature: 200°C (392°F)
- Thermal conductivity: 0.067 W/m·K
- Self-bonding: Yes – adheres to many substrates without primer
- Inhibition sensitivity: Avoid contact with sulfur-, nitrogen-, tin-, or PVC-based materials
Processing Recommendations
- Dispense by volume using static mixers (e.g., 32-element, 8 mm square)
- Ideal dispense rate: 1–2 grams/second for uniform cell structure
- Ambient temperature: 20–30°C (68–85°F) for optimal foam quality
- Purge between dispenses: Recommended within ¼ of gel time (~22 seconds) to prevent nozzle clogging
- Do not confine in sealed cavities without venting—internal pressure may build during expansion
Storage & Shelf Life
- Shelf life: 12 months in original, unopened containers
- Max storage temperature: 38°C (100°F)
Packaging Options
- Available in matched A/B bulk kits for automated meter-mix-dispense systems.
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SilSo Lite 21025 – Fast-Cure, Self-Blowing Silicone Foam for Lightweight Electronics Potting
SilSo Lite 21025 is a two-component, platinum-cure, self-blowing silicone foam engineered for ultra-fast, low-pressure potting where weight reduction, thermal protection, and process efficiency are critical. Upon mixing, it expands 2–3× its dispensed volume via hydrogen gas generation, forming a closed-cell, opaque black foam with excellent flow and minimal internal pressure, ideal for sensitive electronics and complex assemblies.
With an ultra-fast 90-second gel time at 25°C, SilSo Lite 21025 is optimised for high-speed automated dispensing, enabling rapid cycle times in EV battery module production, PCB staking, and thermal insulation applications. Its hydrolytically stable, reversion-resistant chemistry ensures long-term reliability in harsh environments.