Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Technologies
- Product Families
Features & Benefits
Applications & Uses
- Applications
- Application Area
- Cure Method
- Applications
- Electrics & Electronics
- Electronic Control Unit (ECU)
- Heating, Ventilation, Air Conditioning (HVAC)
- Potting & Encapsulation
- Power Control Unit (PCU)
- Encapsulation of electronic components for the automotive and power electronics industries
- Encapsulation of solar cells
- Production of damping elements
- Sealing of clean room filters
- Application Details
Processing
Surface Preparation
All surfaces must be clean and free of contaminants that will inhibit the cure of WACKER SilGel® 612 A/B. Examples of inhibiting contaminants are sulfur containing materials, plasticizers, urethanes, amine containing materials and organometallic compounds, especially organotin compounds. If a substrate’s ability to inhibit cure is unknown, a small-scale test should be run to determine compatibility.
Mixing
Only components A and B with the same lot number may be processed together! Component B of WACKER SilGel® 612 A/B contains the platinum catalyst, component A the crosslinker. Even traces of the platinum catalyst may cause gelling of the component containing the crosslinker. The two components should be thoroughly mixed at a 1:1 ratio by weight or volume. To eliminate any air introduced during dispensing or trapped under components or devices a vacuum encapsulation is recommended.
Curing
Curing time of addition curing silicone rubber is highly dependent on temperature, size and heat sink properties of the component being potted.
Temperature Curing time 23°C 8 hours 100°C 15 minutes 150°C 5 minutes Hardness
- If the gel is too soft and tacky, reducing the amount of component B will result in a harder, less tacky vulcanizate. The hardest formulation is achieved with a mixing ratio for A : B of approximately 1.5:1. For logistical reasons we can only accept orders in a mixing ratio of A:B = 1:1.
- Tack-free surfaces can be achieved by coating with ELASTOSIL® RT 601.
Additives
- WACKER SilGel® 612 A/B can be pigmented by adding 1 - 4 % of an ELASTOSIL® FL pigment paste.
- The reactivity can be adjusted within wide limits by adding ELASTOSIL® Catalyst EP or Inhibitor PT 88 to suit the processing requirements of the particular application. ELASTOSIL® Catalyst EP increases the reactivity, i. e., pot life and curing time are reduced. Inhibitor PT 88 is a pot life extender and prolongs pot life and curing time.
- We recommend running preliminary tests to optimize conditions for the particular application.
- Comprehensive processing instructions are given in our leaflet "Wacker RTV-2 Silicone Rubber-Processing".
Properties
- Color
- Flame Rating
- Physical Form
- Catalyst Properties
- Cured Properties
- Uncured Properties
- Properties
- Two-part, 1:1 mixing ratio
- Low viscosity
- Rapid heat cure
- Very low hardness (silicone gel)
- Crystal clear
- Pronounced inherent tack
- Flame retardant, UL listed 94HB
- Note
Cured for 1hour at 100°C in a circulating air oven
| Value | Units | Test Method / Conditions | |
| Dynamic Viscosity (A+B, at 25°C) | 1000 | mPa·s | ISO 3219 |
| Mix Ratio (A:B) | 1:1 | parts by weight | — |
| Platinum Catalyst in Component (A+B) | Component B | — | — |
| Pot Life (A+B, at 23°C) | 150 | minutes | DIN EN ISO 2555 |
| Value | Units | Test Method / Conditions | |
| Density (at 23°C) | 0.97 | g/cm³ | DIN EN ISO 1183-1 A |
| Flame Retardancy | 94 HB | — | UL Listing |
| Penetration (150g hollow cone, 1 min) | 30 | mm | DIN ISO 2137 |
| Permittivity (at 50Hz) | 2.7 | — | IEC 62631-2-1 |
| Refractive Index (nD²⁵, at 25°C) | 1.404 | — | — |
| Volume Resistivity | 10¹⁵ | Ohm-cm | IEC 62631-3-1 |
| Value | Units | Test Method / Conditions | |
| Density (at 23°C, Componenet A) | 0.97 | g/cm³ | DIN EN ISO 2811-1 |
| Density (at 23°C, Componenet B) | 0.97 | g/cm³ | DIN EN ISO 2811-1 |
| Dynamic Viscosity (Component A, at 25°C) | 1000 | mPa·s | ISO 3219 |
| Dynamic Viscosity (Component B, at 25°C) | 1000 | mPa·s | ISO 3219 |
Regulatory & Compliance
- Certifications & Compliance
Safety & Health
- Safety Notes
According to the latest findings WACKER SilGel® 612 A/B being an addition-curing silicone rubber contains neither toxic nor aggressive substances which might require special handling precautions. General industrial hygiene regulations should be observed.
Packaging & Availability
- Country Availability
- Regional Availability