SILOCZEST® RTV Silicone Insulator Coating ( RTV-SIIC)

INTRODUCTION

• The room temperature vulcanizing silicone rubber coatings were used for the first time in USA over 30 years ago.

• This method is more convenient than the hand cleaning of insulators or application of vaseline or silicone pastes. The porcelain insulators with a 0.3 – 0.6 mm thin silicone coating have similar properties to composite insulators with a thicker silicone housing.

• A 0.3 mm thin silicone layer is able to transfer the hydrophobic properties to the pollution layer. As a result, the leakage current decreases and the flashover voltage increases.

• Coated Insulators not affected by UV light, corona discharge, chemical contaminants, salt, extreme temperatures or corrosive environments.

ADVANTAGES

• RTV-SIIC silicone coating on insulators, is engineered to provide a highly hydrophobic surface for its entire life, thus limiting leakage current and preventing flashovers due to insulator contamination.

• The coating is not affected by The benefits of RTV-SIIC coated Porcelain insulators are two fold – Sturdiness of Porcelain insulators and pollution performance of Silicone insulators.

• It also reduces the O&M cost on account of frequent cleaning and washing of insulators in high pollution zones. RTV-SIIC Coating the porcelain insulator with silicone rubber is one way to improve the water repellency.

• RTV-SIIC silicone coating is highly recommended for the coastal and sea shore areas.

• RTV-SIIC can be applied by brushing or dipping.
• For Spraying , Flat nozzle of 0.33 mm, 20° @ pressure output of 50 – 150 bar
• Full cure is obtained in 8 – 12 hours after coating application depending on thickness, temperatureand humidity.

SURFACE PRETREATMENT

• Proper cleaning by using water and a suitable detergentmight be sufficient.

• Insulators that show an adhering pollution, such likecement, other mineral or chemical pollution layersshould becleaned by either “cob corn-” or carbondioxide blasting.

• Any type of grease or fatty pollution is to be removedby using a suitable solvent like benzine or turpentine.

• Residual contaminants should be removed bythoroughly wiping.

• Finish the cleaning just before spraying RTV-IC withIsopropanol or an equivalent alcohol..