Elastomeric Silicone Applied On Top Of Aluminum Coating

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Old 07-20-15, 02:27 PM
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Elastomeric Silicone Applied On Top Of Aluminum Coating

I have a flat, metal roof with slight 'ponding' (gone in ~48hrs).

I want to re-coat the roof.

It currently has an aluminum coating on it.

I was to cover it with an elastomeric silicone coat. I've read that the silicone stands up best to water.

QUESTION:
1) Are there any issues with putting elastomeric on top of an aluminum coat?
2) Does anyone have an alternate suggestion to using elastomeric silicone in this situation? Sta-Kool 780 is what I plan to use.

Thanks so much,
 
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Old 07-20-15, 03:17 PM
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Welcome to the forums!

Is it an aluminum paint or an aluminum fibered roof coating? What condition is it in? any reason for not going with more of the same?

As long as the aluminum coating is clean, I doubt there would be any issues with applying elastomeric over it. Be aware that elastomeric will not stop any rust that may be present on the roof.
 
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Old 07-21-15, 08:44 AM
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Marksr, thanks for the reply.

It was an aluminum fibered roof coating. The previous owners put it on. It looks like medium wear maybe. The main problem is a leak near the edge. The seam is open and leaking. I was going to patch the seam and then coat the roof.

I was just under the impression that elastomeric was longer lasting, especially the silicone based elastomeric when you are dealing with 'ponding.'

Also, it's supposed to reflect-off more heat.

Think the benefits would be negligible?
 
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Old 07-21-15, 09:28 AM
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If you read the instructions you'll see this won't work for you...

I have a flat, metal roof with slight 'ponding' (gone in ~48hrs).

-- how to apply elastomeric coating
Surface and air temperatures must be a minimum of .......... DO NOT apply to flat surfaces, poor drainage areas, or where ponding water will exist.


I tried something like this years ago and if there was any ponding at all the stuff will liquefy and run off. Hard to believe but it does and this was long after, weeks, that it had dried.
 
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