POWERSIL® INSULATOR FINISH is a self levelling, one-component silicone rubber, which cures at room temperature under the influence of moisture in the air. The elastomer has good mechanical and very good electrical properties.


  • acetic acid-curing system
  • very good resistance to weathering and air pollution


  • Product Rheology: Self-levelling
  • Resistance: Resistant to tracking and erosion
  • Specific Features: Resistant to tracking and erosion


All the information provided is in accordance with the present state of our knowledge. Nonetheless, we disclaim any warranty or liability whatsoever and reserve the right, at any time, to effect technical alterations. The information provided, as well as the product's fitness for an intended application, should be checked by the buyer in preliminary trials. Contractual terms and conditions always take precedence. This disclaimer of warranty and liability also applies particularly in foreign countries with respect to third parties' rights.

Repair material for silicone rubber sheds and housings of longrod and hollow core insulators, arresters and bushings.

POWERSIL® INSULATOR FINISH shows good primerless adhesion to cured silicone rubber and many substrates. We recommend to run preliminary tests to optimize conditions for the paricular application.


The 'Best use before end' date of each batch is shown on the product label.


Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.

Sales and support

Wacker Chemical Corporation
3301 Sutton Road
Adrian, MI 49221-9397
United States
+1  888  922-5374 (Phone)

How can we help you?

  • Do you need help in choosing a product or do you require technical support? If so, please contact our experts.
Ask a question

Would you like a product sample?

You can request a product sample here.

Request sample

More products

Products Technical data
Tear strength Viscosity, dynamic Hardness Shore A Tensile strength Elongation at break
POWERSIL® INSULATOR FINISH 5.0 N/mm[1] 5.0 N/mm[1] 200000 mPa·s[2] 200000 mPa·s[2] - - 1.4 N/mm²[4] 1.4 N/mm²[4] 500 %[5] 500 %[5]
POWERSIL® N 553 DARKGREY 9.0 N/mm[1] 9.0 N/mm[1] 4000 mPa·s[3] - 60[6] 60[6] 3.0 N/mm²[4] 3.0 N/mm²[4] 100 %[5] 100 %[5]
[1] Tear strength | ASTM D 624 B,  [2] Viscosity, dynamic | DIN EN ISO 3219,  [3] Viscosity, dynamic | 25 °C | DIN EN ISO 3219,  [4] Tensile strength | ISO 37 type 1,  [5] Elongation at break | ISO 37 type 1,  [6] Hardness Shore A | DIN ISO 48-4 


My media

My favorites

My products