Power Washing and Roof Cleaning Forum

Capital Roof Wash · Approved Exterior Cleaner

Concern About Elastomeric Paint

Eric Schnaible · Approved Exterior Cleaner

I am giving a proposal for a super nice, very large Slate roof corporate HQ. On the test I did, it seems the elastomeric paint may have been bleacehd. Anyone have any thoughts on this?

Liberty SoftWash · PWS Vender

What are your concerns.

Eric Schnaible · Approved Exterior Cleaner

That it can be affected by our typical mix, like an oil based paint.
In my experience, elastomeric is water based and should not be an issue.

Liberty SoftWash · PWS Vender

Elastomeric is water base and solvent base. It can be one or the other.

Liberty SoftWash · PWS Vender

We are spraying oil base right now in MD. 100 55gl drums on a 200,000 sq roof.

Eric Schnaible · Approved Exterior Cleaner

Oil based elastomeric?

Liberty SoftWash · PWS Vender

Yep.

Eric Schnaible · Approved Exterior Cleaner

Thanks Ray. I will need to look into this. Hope I don't have to pass on the job. When I tested it I told the owner I thought it was a water based elastomeric and he confirmed it was. At this point I think it must be solvent.

AC Lockyer · Approved Exterior Cleaner

Eric,

Any paint has tint and some tints are not color fast (see pix). Please do a paint test first to see if the paint will change color. Other than that as long as you keep the paint rinsed off keeping the roof cleaning strength from dwelling on the paint too long, you should be OK.

Another concern can be how long ago was it painted. If the paint hasn't cured yet the bleach can act as a solvent blistering or removing the paint.

Also industrial paints like elastomeric are robust and take bleach exposure well. I dont think there will be an issue. Just watch for paint color reversal.

AC

-- Edited by AC Lockyer on Tuesday 24th of September 2013 03:00:45 PM

AC Lockyer · Approved Exterior Cleaner

Eric Schnaible wrote:
Thanks Ray. I will need to look into this. Hope I don't have to pass on the job. When I tested it I told the owner I thought it was a water based elastomeric and he confirmed it was. At this point I think it must be solvent.

Eric,

I am having a Revolution Camp in LA on November 8th and 9th.

AC

Eric Schnaible · Approved Exterior Cleaner

Thanks AC.
I think I will be ok if I keep things rinsed. It will just be difficult given the roof. I cant walk it. A beautiful, technical slate. It will make great photos. I will definitely be using carbon fiber poles.

I wont make LA. Too many family responsibilities. Thanks though.