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100HV is a single component silicone RTV (room temperature
vulcanizing) coating. It has been specially formulated for use on high
voltage insulators. Its unique hydrophobic qualities give it the ability
to shed water making it self-cleaning. In most environments, routine
cleaning is not necessary. In severe conditions, Siltech 100HV may be
cleaned by high pressure water wash up to 1,500 PSI. Bonding enhancers are
built in to eliminate the need for a separate primer. It has
excellent dielectric strength and tracking resistance. In areas where
animal induced outages are a problem, Siltech 100HV may be sprayed
directly over galvanized steel without extensive surface prep. Its high
build abilities make it possible to reach a dry film of 24 mils with only
three passes.
Surface Preparation
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Intended Uses:
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High voltage insulators |
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Switch boxes |
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Animal induced outages |
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Precipitators |
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Insulators and Bushings
1. New insulators need only be high-pressure water washed. Whenever,
possible use deionized water for cleaning. If insulators are contaminated
with grease or oil then solvent cleaning or SSPC-SP1 can be used. A fast
drying solvent such as lacquer thinner should be used.
2. Existing insulators may need more aggressive cleaning. Environmental
deposits such as minerals, chemicals and dust need to be removed. Carbon
deposits formed by current tracking need to be completely removed. Several
methods of wet and dry abrasive blasting are acceptable such as:
* Wet or dry soda blasting
* Dry blasting with corn cob
* Dry blasting with corn cob and lime mixed
WARNING! Soda is conductive and needs to be completely removed
before switching equipment back in. Corn cob fall out needs to be removed
to allow for proper drainage.
Metal Surfaces
Siltech 100HV has excellent adhesion on all metal substrate and requires
only a clean, dry surface before application. All surface contamination
may be removed by SSPC-SP1, SP2 or SP3.
Dry Film
Requirements Insulators and Bushings
Due to the irregular configuration of insulators, it would be impossible
to maintain consistent dry film thickness. An optimum dry film of 18 mils
with a range of 12 to 28 mils should be maintained in one continuous film
with no holidays or breaks. Steel 28 mils minimum |
| Property |
Results |
| Type |
One-Part, RTV Silicone |
| Cure Method |
Oxime, Moisture |
| Specific Gravity |
1.09 |
| Viscosity |
2600 cps |
| Application Temp |
(0 - 120°) F |
| Service Temp |
(-50 to 300°) F |
| Skin Over Time |
10 min. |
| Tack Free Time |
60 min. |
| % Solids (volume) |
70 |
| Durometer (Shore A) |
46 |
| Tensile Strength |
200 (psi) |
| Elongation at Break |
85 (%) |
| Dielectric Strength |
400 volts |
Application
Siltech 100HV is packed in a nitrogen blanket and will begin to cure when
opened. Siltech coatings require specially modified equipment to avoid
curing in the lines. Consult your local Silchem SCI representative for
assistance.
Mix thoroughly before use. Do not coat when relative
humidity is greater than 85% or when dew point is less than 5 degrees
above surface temperature. Siltech 100HV is a single component material
which is ready for application by airless spray as provided. Conventional
spray may require further reduction. Up to 20% VM&P naphtha may be
added.
WARNING! Siltech 100HV is not formulated for live
application. |
Download PDF Tech Data sheet for printing:
Siltech
100HV PDF 
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