Quote:
Originally Posted by AUdubon5425
What did you see in the Permatex RTVs that concerned you? (trying to learn something here)
|
First, less than 40% of the product is rubber (siloxane). RTV3145 is > 60%.
Second, one of the chemical components (listed as 5-15%) is SYNTHETIC ISOPARAFFINIC HYDROCARBON (spelling corrected from "Hydrocaron"" - kerosene for short. Kerosene will dissolve paraffin, the very wax in the flyback, and this might create a problem.
Third, I've used RTV3145 (gray only) before on flybacks - countless TV flybacks and, while in the Navy, on high voltage transformers in several dozen in F/A-18 MPDs (multipurpose displays) without failure. In the MPD, corona would develop in high humidity (Indian Ocean ops), and we sealed the lead and connections with RTV. It kept the "Smoky odor in cockpit" gripes down.
My only drawback with RTV3145 is the damn cost - now about 26-30 bucks a tube. Andy's suggestion to use GE Silicone II looks more promising in the economic sense. 100% elastomeric rubber, and commercially available (our hardware store sells it in three tube sizes!)
Cheers,