Description
Insulcast RTVS A-4000 is a two-part RTV silicone potting and encapsulation compound for electronics that run hot and take abuse in the field. It pours or pumps around an assembly and cures to a tough, protective mass that seals out moisture and cushions components against shock.
Insulcast RTVS A-4000 Benefits
- Seals out moisture, dust, and contaminants
- Cushions components against shock and vibration
- Strong dielectric protection at 450 kV/mm for reliable electrical isolation
- Wide service range from -73 to 260 C
- Low 3,000 cP Part A viscosity flows into tight assemblies
- Backed by ITW Performance Polymers
Common Applications
- Potting power supplies, transformers, and coils
- Sealing sensors, connectors, and control modules
- Protecting LED and lighting electronics
- Encapsulating medical device electronics
- EV and e-mobility power electronics
Typical Properties
- Mix ratio (by weight): 100:3.3
- Viscosity (Part A): 3,000 cP
- Pot life (25C): 24 min
- Cure: 24-96 hr @25C or 8 hr @200C
- Service temp: -73 to 260 C
- Dielectric strength: 450 kV/mm
Surface Prep and Use
Mix Part A and Part B at 100:3.3 by weight. Pour or pump the mixed compound around the assembly and degas under vacuum for a void-free pot in critical parts. Cure 24 to 96 hours at 25 C, or 8 hours at 200 C for a faster turnaround.
Ordering and Product Support
Insulcast RTVS A-4000 is part of our encapsulants and potting compounds line, manufactured by ITW Performance Polymers.
Call (800) 220-1966 or email [email protected] for pricing, lead time, and technical support.
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