POWERSIL GEL A/B - Wacker Chemie - Insulators

Important
- The platinum catalyst is contained in component B. Only components A and B with the same lot number may be processed together.
Surface Preparation :
- All surfaces must be clean and free of contaminants that will inhibit the cure of POWERSIL® GEL A/B. Examples of inhibiting contaminants are sulfur containing materials, plasticizers, urethanes, amine containing materials and organometallic compounds - especially organo-tin compounds.
- If a substrate’s ability to inhibit curing is unknown, a small scale test should be run to determine compatibility.
Mixing :
- 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.
- The reactivity can be adjusted within wide limits by adding Catalyst EP or Inhibitor PT 88 to suit the processing requirements of the particular application.
- Catalyst EP increases the reactivity of the gel with corresponding reduction or pot life and curing time. Further information is given in our leaflet “Catalyst EP/Inhibitor PT 88”. 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 roughly 1.5 : 1. 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”.
Curing :
- Curing time of addition curing silicone rubber is highly dependent on temperature, size and heat sink properties of the component being potted.

Applications

Cable Accessories
Insulators
Sealing of MV and HV cable joints
LV easy-to-use cable joints

Properties

Color

Transparent

Physical Form

Gel,

Softgels

Catalyst Properties


	Value	Units	Test Method / Conditions
Curing Time (A+B, thickness: 1cm, at 100°C)	15	minutes	-
Curing Time (A+B, thickness: 1cm, at 150°C)	5	minutes	-
Curing Time (A+B, thickness: 1cm, at 23°C)	8	hours	-
Dynamic Viscosity (A+B, Shear rate 10 s⁻¹)	1000	mPa·s	DIN EN 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)	140	minutes	-

Cured Properties


	Value	Units	Test Method / Conditions
Density (at 23°C)	0.97	g/cm³	DIN EN ISO 1183-1 A
Dielectric Strength	23	kV/mm	IEC 60243-1
Dissipation Factor (tan δ, at 50Hz)	2 x 10⁻⁴	-	IEC 62631-2-1
Penetration (Hardness, 150g cone, 60s penetration time)	30	mm	DIN ISO 2137
Permittivity (at 50Hz)	2.5	-	IEC 62631-2-1
Volume Resistivity (at 23°C)	10¹⁶	Ohm-cm	IEC 62631-3-1
Youngs Modulus	0.005	mPa	-

Uncured Properties


	Value	Units	Test Method / Conditions
Dynamic Viscosity (Component A, Shear rate 10 s⁻¹)	1000	mPa·s	DIN EN ISO 3219
Dynamic Viscosity (Component B, Shear rate 10 s⁻¹)	1000	mPa·s	DIN EN ISO 3219

Properties