Applications

RTVS 27 LV

Brand: Insulcast

Package Sizes: Contact us for details.

Shelf Life: 12 months

Product Description:

RTVS 27 LV is a low-viscosity, general-purpose, reversion-resistant RTV silicone compound designed for commercial potting and casting applications. It has a one-to-one mix ratio by weight or volume, making it ideal for automated dispensing or manual mixing. RTVS 27 LV cures rapidly at elevated temperatures, enabling efficient processing in production environments, and meets the UL 94V-0 flame retardant standard.


Key Features:

Low Viscosity: Ensures easy flow into complex geometries.
UL 94V-0 Flame Retardant: Complies with stringent fire safety regulations.
One-to-One Mix Ratio: Ideal for both dispensing equipment and manual applications.
Fast Cure Capability: Cures rapidly at elevated temperatures for quick processing.
Reversion Resistant: Maintains mechanical integrity over time.


Recommended Applications:

🔹 Electronic Potting & Casting: Protects transformers, sensors, and circuit boards.
🔹 Automotive & Aerospace Electronics: Provides thermal and electrical insulation.
🔹 Encapsulation Applications: Ensures reliable protection for sensitive components.
🔹 Industrial Equipment: Used in high-performance electronics and power systems.

Uncured Properties (@ 25°C)

Property Part A Part B Mixed Test Standard
Color Black Buff (Neutral) Visual
Viscosity (cP) 1,200 1,200 1,200 ASTM D1084
Specific Gravity 1.47 1.47
Mix Ratio (by Weight/Volume) 1:1
Pot Life (100g mass) 2 hours

Cured Properties (@ 25°C)

Property Value Test Standard
Hardness (Shore A) 60 ASTM D2240
Tensile Strength (psi) 500 ASTM D412
Tensile Elongation (%) 100 ASTM D412
Tear Strength (Die B) (lb/in) 15 ASTM D624
Coefficient of Thermal Expansion (°C⁻¹) 22 × 10⁻⁵
Linear Shrinkage (%) 0.2
Thermal Conductivity (BTU-ft/(ft²·hr·°F)) 0.18
Thermal Conductivity (BTU-in/(ft²·hr·°F)) 2.16
Service Temperature Range (°C) -55 to +204

Electrical Properties (@ 25°C)

Property Value Test Standard
Dielectric Strength (V/mil) 500 ASTM D149
Dielectric Constant (1 kHz) 3.4 ASTM D150
Dissipation Factor (1 kHz) 0.004 ASTM D150
Volume Resistivity (ohm-cm) 3.0 × 10¹⁴ ASTM D257

Cure Schedule:

Cure Method Time & Temperature
Room Temperature Cure 24 hours at 25°C (77°F)
Accelerated Cure 1 hour at 60°C (140°F)
Rapid Cure 15 minutes at 95°C (203°F)

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