High Voltage Insulator
Proven protection against pollution
The same formulation for more than 25 years
To deliver products and services which safely
solve today’s problems and prevent tomorrow’s
High reliability, long service means lower lifetime costs.
With SYLGARD HVIC, one application does it all – for years, SYLGARD HVIC – the superior coating
eliminating the need for repeated water washing or greasing and
We at Dow Corning believe that SYLGARD HVIC is clearly
this results in significant savings in maintenance and replacement
superior. Only SYLGARD HVIC – with its unchanged formulation
costs. Time and again SYLGARD HVIC has proven the long
over the last 25 years and combined with an unparalleled field
lasting, reliable and most economical solution.
application history can provide true peace of mind, long term,
SYLGARD HVIC is supplied as a white, one part room uninterrupted reliability and lowest life time running costs.
temperature vulcanising (RTV) silicone elastomer dispersion in
a high flash point (40°C [104°F]) naphtha spirits solvent.
Prove it for yourself
The product provides un-primed adhesion to glass and porcelain
insulators and can be applied by spraying, brushing or dipping. We challenge you to complete an economic evaluation for your
Recommendations on proper application, dilution techniques own specific situation. You’ll discover that SYLGARD HVIC
and spraying equipment are covered in the SYLGARD HVIC delivers more than just superior performance and better long-term
application guide. SYLGARD economics. Why? Because SYLGARD HVIC delivers long-life
HVIC is normally applied in two performance without the need for costly repeated maintenance
to three coats depending on the procedures. We will provide you with a simple computer cost
type of spraying equipment being model which will allow you to compare the costs of installing
used. A 10 to 15 minute drying SYLGARD HVIC versus the application of greases or water
time between coats is required washing to generate a typical lifetime cost curve similar
dependant on the temperature to the example shown below.
Maximum protection and life
SYLGARD HVIC - the lowest cost in the
expectancy is achieved with
a cured thickness of 0.5 mm
(0.020 in). The white colour On a one-time basis in a typical installation, water washing is
Insulator coated with
SYLGARD HVIC and covered allows visual inspection for usually the least expensive protection against pollution-induced
with iron ore dust, 10 years on
uniform coating and the flashovers. However water washing needs to be repeated regularly
it still shows excellent
hydrophobicity. identification of thin spots. so to evaluate the long term costs of water washing vs. grease and
SYLGARD HVIC, a typical calculation as below should be
Porcelain and glass surfaces should be dry and clean before
application. If silicone (or other) grease has been previously used
on the insulators, this should be completely removed by wiping
and the surface cleaned with isopropyl alcohol before application Cost, $ Total costs for one 45kV insulator over 15 years
of the SYLGARD HVIC.
Long field-testing proves quality 700
For more than 25 years Dow Corning customers have been using 500
SYLGARD HVIC throughout the world – from Argentina to 400
Alaska, from Saudi Arabia to Singapore, and test sites such as 300
these have proven that SYLGARD HVIC is the superior coating.
At many of the test sites, arcing and flashovers had been causing 100
frequent outages – up to once a month. In most cases, once 0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
SYLGARD HVIC was applied, arcing and flashover were Time, years
eliminated. Water washing Silicone grease SYLGARD HVIC
Total $900 Total $468 Total $67