TPO Sealant

[Acdii]

I've been researching best ways to clean the black off the roof. The first thing is to determine what material it is, so I went and pulled a trim ring and found out it is TPO.

Simple Green or Murphy's oil soap is recommended, and I have Simple Green, so mixed up a 1:1 and went up, sure enough a stiff brush and some SG and it cleaned what I couldn't before. Yeah

So while I was up there I noticed what looks like a nick in the membrane on the edge where it wraps around and down. It doesn't appear to be through the material, but why take a chance, so went and got my tube of roof sealer that I have used previously last year and discovered, (Not for TPO).

A search is coming up with conflicting information. It is Geocel advanced EPDM sealant. At the time I thought it was EPDM since that is what I was told by Camping World. On the tube it says, not for TPO, but on their web site, Geocel, it says it is for TPO.

For Use On

White EPDM, primed TPO, primed PVC, metal, other pre-fabricated sheet goods, and other common building substrates

:?

[Acdii]

In that case, the sealant won't harm TPO, it just wont stick. OK, That's a relief. I know the few spots where the sealant touches the roof material is sticking well, but those are smears where a drop of goo landed and got wiped off. I mainly just went over spots that appeared to be compromised, like screw heads, and some cracks on lap joints.

They really should have an * after TPO to avoid confusion, because other might see that and not look any further through wherever you found that note. I clicked the link, that page opened and it said for use on TPO, why look any further, right?

[garym114]

Guess they want to alert to TPO has to be primed.

In description: A primer such as 45P® TPO & PVC Primer must be used in applications involving TPO and PVC.