Quote:
Originally Posted by Findm-Keepm
Heat doesn't cure RTV, only exposure to air and time. Room Temperature Vulcanizing. Heat may open air passages (tunnels) within the RTV, which is why the DoD bans heat application to RTV products. If you are trying to seal up something, why heat it and create tiny tunnels?
Now epoxy, yes - heat that stuff! It shortens the cure time, and makes bubbles trapped within to pop, making for a better cure. But RTV, no.
|
Having worked in the Automotive Industry for the last 11 years, and having sold parts for the last 3 years, I feel I can step in.
You're right, heating it will create bubbles, but UltraGrey, UltraBlack, and the more modern RTV's set up with in an hour of being applied, and cure fully with in 24 hours. It can be placed in to service with in an hour.
Also, we're talking about a hot engine block, not a paper & wax flyback transformer in a vintage television. The flyback doesn't get nearly as hot as an engine. It's heat did nothing to aid in making bubbles, or curing it any faster then it would cure anyway.
I requested he used UltraGrey because of that reason, and because I have had amazing personal success sealing up leaky Flybacks with it before. I keep a small tube in my toolbox. Sony Fly's are notorious for splitting in the center of their hard plastic "tire" and leaking out high voltage and arcing. I just slather a little UltraGrey on, let it cure, and the voltage leaks are gone.
Just my two cents. You are 100% right, it will have that issue on a smoking hot engine, but a warm flyback won't effect it in the same manner.