I remember reading someone using RTV sarurated fiberglass to seal baffle gaps. Seems like they squeegee it between plastic and allow it to cure.
Any tips?
Which RTV? Red High Temp?
I remember reading someone using RTV sarurated fiberglass to seal baffle gaps. Seems like they squeegee it between plastic and allow it to cure.
Any tips?
Which RTV? Red High Temp?
I read RTV cures in humidity. That's a problem up here.
Our humidity is really low.
You can read between Dan's lines here, but to be clear - peel one side off before it cures and apply that to the fins. The adhesion is quite good. Remember, the tips of the fins are the coolest.Larry, use Permatex Ultra Black, available at almost any auto parts store. Also known as Loctite 598, same thing. Highly oil resistant, same temp rating as the ugly orange stuff, nice charcoal color.
Be sure to run a small bead across the aluminum wrap near the entrance end before placing it over the RTV/glass gasket. Allowing an air leak between the gasket and the aluminum wrap would defeat the purpose. It's the little dot below.
I like 4 mil plastic for working the RTV into the glass. Clean the ends of the fins before you stick the patch into place. Leave the plastic on the exposed side. After cure, peel the plastic to expose a nice smooth surface.
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Larry, use Permatex Ultra Black, available at almost any auto parts store. Also known as Loctite 598, same thing. Highly oil resistant, same temp rating as the ugly orange stuff, nice charcoal color.
Be sure to run a small bead across the aluminum wrap near the entrance end before placing it over the RTV/glass gasket. Allowing an air leak between the gasket and the aluminum wrap would defeat the purpose. It's the little dot below.
I like 4 mil plastic for working the RTV into the glass. Clean the ends of the fins before you stick the patch into place. Leave the plastic on the exposed side. After cure, peel the plastic to expose a nice smooth surface.
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You ask why I only did one side? I saw some baffle wear on one side, pulled the baffles on that side to make repairs, and added the RTV/Glass before I reinstalled the aluminum baffles on those 2 cylinders.
I'll probably do the other side one of these days.
You can read between Dan's lines here, but to be clear - peel one side off before it cures and apply that to the fins. The adhesion is quite good. Remember, the tips of the fins are the coolest.
OK so help me understand if this is correct:
1) Normally the baffles sit directly against the cylinders? Is this correct, but isn't there chaffing wear there?
2) You saw some wear on the baffles, so you added the RTV fabric stuff to seal the gap between the baffle and the cylinders and also prevent the chaffing wear?
Apparently RTV needs humidity to cure. That's what I've read.
I may set up a box with a humidifier to cure sheets and use them after they cure. I can apply it to the baffle and cure in the box. Probably not as efficient as sealing the cylinder fins, but it won't make a mess.
You realize the plan is to peel the plastic from one side, stick that side to the tips of the fins, allow cure, then peel the exposed side?
Thanks. Correct. The RTV will cure. Temp doesn't seem to matter.The layup wasn't going to cure trapped between 2 layers of plastic -moisture couldn't get to it. That said, I believe you're over-thinking it. With one side exposed to the atmosphere, it'll eventually cure. Might take a day, might take two, might take 3, but it is gonna cure.