Any experience with cleaning this?

[John Orr]

This structure is made of some type of plastic/resin or fiberglass. The problem is that it has not been cleaned since construction (13 years) and the white silicone caulk is black and being carried down the panels. I need to clean the caulk - as well as the panels.

Here's what I've tried on the panels: Simple Green, full strength, Krud Kutter and an industrial non-butyl cleaner supplied by the property manager. All were applied with a car-wash brush and rinsed without pressure. The streaks were reduced, but shadows remained. I also tried a Magic Eraser (in a small, inconspicuous area) and it did a fair job of removing the shadows.

On the caulk, I used varying %'s of chlorine - including 12.5%. It lightened the caulk to gray. Even with scrubbing, I could not get it white.

I spoke with Mike at Eacochem and he's sending me a care package.

[PressurePros]

Once caulk is blackened, John, it stays that way. At least that's been my experience throwing everything at it. The panels probably need a resto acid. GS Restoration or OneRestore would be what I would probably go to.

[John Orr]

Once caulk is blackened, John, it stays that way. At least that's been my experience throwing everything at it. The panels probably need a resto acid. GS Restoration or OneRestore would be what I would probably go to.

Well, I hope that Eaco Chem has a solution. They sent me before and after pics of a building that looks similar, but... BTW, in addition to the cleaning, the customer is wanting an estimate for waxing!

[Innovativewash]

Mike will have your answer on this. If you apply Glory BC and a little scrubing this should take off the black streeks from caulk bleed.