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Red / Grey High Voltage Insulator Coating , Electric Power Line Silicon RTV Coating

China Kayi Industrial Co., Ltd.
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China Kayi Industrial Co., Ltd.
Province/State: Jiangsu
Country/Region: China
Tel: 86-755-26927358
Contact Person:
Mr Warren

Red / Grey High Voltage Insulator Coating , Electric Power Line Silicon RTV Coating

Brand Name : Changgong
Model Number : SRTV-RTV-PRTV
Certification : SGS test report,5000 hour aging test report and type test reports
Place of Origin : China
MOQ : As per the requirement from the client
Price : 15.00 USD to 25.00 USD per kg
Supply Ability : 20 Tons per month
Packaging Details : Bucket or Cans
Name of the product : RTV High Voltage Insulator Coating
Solid content : ≥%30
Specific gravity : 0.92-1.42 g/cm3
Tensile strength : 4.24 N/mm2
Tear strength : 10.2 N/mm
Volume resistivity : 6.05*1013
Color : Red or grey
Application : Transmission lines substations as well as railways
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Red / Grey High Voltage Insulator Coating , Electric Power Line Silicon RTV Coating

I: Guaranteed technical particulars:

No.propertiesTest MethodunitMinimum requirement



1Solid contentDLT627-2012≥%3051
2Solid volumeIEC≥%40/
3Shelf life--Month1212 Months
4Tack free timeMinute4525 Minutes
6Specific gravityDLT627-20120.5g/cm³….2g/cm³0.92-1.42 g/cm3
7Flash pointDLT627-201230°C…………45°c35 °c
8Skin-over time at 23°cDLT627-20129min….40min20 min
9Water replellenceDLT627-2012105°C…..130°C113.8°
10Arc resistanceDLT627-2012180s ≥191s
11Volume resistivityDLT627-20121.2*10¹²6.05*1013
12Application temp rangeDLT627-2012-10°c…….+60°C-50-200°C
13Colour material--greyGREY
14Dielectric constant at 50 HZDLT627-2012≤32.0-2.1
15Dissipation factor at 50 HZDLT627-2012≤0.40.2-0.23
16Contamination flashover resistanceDLT627-2012


U2(un coated)


17Adhesion Ability TestIEEE std 1523PassPASS
18Salt fog testDLT627-2012h1000H5000H
19Tensile strengthDLT627-2012N/mm²34.24 N/mm2
20Tear strengthDLT627-2012N/mm910.2 N/mm
No.SubjectGuaranteed Value
1Solid Content by Weight51
2Solid Content by Volume/
3Density -Uncured0.92
4Density Cured


Anti pollution flashover coating

Ⅱ. Product characteristics

  1. Excellent hydrophobicity and quick, balanced and lasting hydrophobic migration property. Continuous water film will not be formed even in atrocious weather (rainy, foggy, dewy, or drizzly).
  2. High anti pollution flashover voltage, anti electric arc, tracking resistance, excellent electrical insulation;
  3. High strength; high adhesion; acid, alkali and salt resistance; corrosion resistance to strong oxidizer;
  4. Ozone resistance, UV rays resistance, resistance to environmental aging; non peeling, non cracking
  5. Formed inplace; convenient to use; meeting the needs of anti pollution technology and measures for power transmission and transformation equipment fields;
  6. Long effective operation time; easy to maintain; free cleaning during the period of validity; high efficiency.

Ⅲ Implementation standard

National Grid Construction and Operation[2006]1022 National Grid Company Cross-region Grid’s Guidelines on the Anti pollution Flashover Coating Application for External Insulation on Power Transmission Equipment (Trial Implementation) DL/T627 Room Temperature Cured Silicone Rubber Anti pollution Flashover Coating For Insulators.

Anti pollution flashover coating

IV. Daily maintenance

1. During normal inspection work, if damage caused by mechanical external force occurs on the surface partly, the coating product should be reapplied or re-coated on the damage.

2. The hydrophobic property of the coating should be observed in foggy and dewy weather. If the hydrophobic angle is less than 90º or the angle disappears and does not recover in 48 hours, reapplication or re-coating work should be arranged to be done.

Anti pollution flashover coating

V: Notes

1. The packing barrel should be sealed instantly after opening or using and the coating should avoid prolonged exposure to the air in order to prevent the coating from curing.

2. The application work should be carried out in good sunny weather.To guarantee the application quality, application work is not allowed in rainy, foggy, sandy weather .

3. The insulator surface should be cleaned before coating. Grease, dust, moisture remains should be strictly eliminated on the insulator surface.

4. Dusty, spalling, peeling coating should be removed on the original coating when re-coating the insulator that has already been coated. The original coating which is invalid but with good adhesion has no necessity to be eliminated. Re-coating work can be done on it directly and the re-coating quality will not be affected basically.

ⅤI. Use method (application site)

  1. We suggest that the product should be coated in power-off state by application personnel who have obtained professional application qualifications.
  2. The surface of the insulators should be cleaned before the application and the surface should be guaranteed to be dry without dust or oil etc..
  3. Application methods such as spraying and brush coating etc. can be adopted and the application work should be carried out in sunny weather.
  4. The thickness should be 0.3--0.6mm, and the coating should be complete, not defected and not missed.
  5. The surface will dry out in 45 minutes after coating. If the coating thickness does not achieve the project requirement, spraying or brush coating can be carried out again. It solidifies in 24--48 hours.

Ⅶ.Use range

The product is mainly used for the eternal insulators’ enduring ant-ipollution flashover in power systems, transformer substations, transmission line insulators, power plants, Power user s’ substation equipment and other electrical equipment. It is applicable for the eternal insulation antipollution flashover for socket transmission line equipment, transformer substation of various voltage levels or AC, DC systems that all operate under contaminated conditions at the environment temperature between -50℃~100℃. It prevents flashover and connection and improves the levels of the external insulation of the equipment.

The product is also widely used in various polluted environments such as metallurgy, cement, chemical industry, mine and salt mist etc.. It is largely used in systems of and above 500KV and performs excellent anti-pollution flashover property, and therefore guarantees secure operation of the power grid.

VIII. Package information

Packing size:

5kilograms/metal pail

10kilograms/metal pail

Custom-made packing is also served.

Product Tags:

rtv coating


insulator coating

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