It says not to wash your roof forst. Unless your roof is clean, I would and I did wash it foirst. I let it dry over night and then I sprayed this on as instructed. I did not have a presure washer but I had a soft scrubber and a pressure nozzle on my hose. It did the trick.Easy to use and worked great with the second part application of the membrane. It is spendy, but I highly recommend this!

I have a 40-foot camper i order two bottles needed 3 had to stretch the 2 bottle to finish the roof. Order 3ed bottle to finish the slid outs.

Used this step 1 before Step 2 (coating) so waiting to see if these products work. It was a real pain to cover camper sides up in plastic but that's what directions state is necessary. We didn't wash roof prior to using this step 1 either because directions say not too, however in the past, we've had camper roof come much cleaner when we have power-washed it but we followed the directions as the product stated and didn't do so.

Worked fine for coating my truck camper RV. Was leaking and caulking with dicor self leveling sealant and then coating with this fixed my issues. Looks good and worked fine.

Exactly as advertised

Easy to use works very well

This is not an easy task, but when you do it and do it right, you will be happy.Plan to watch videos to learn, watch the weather, you will need at least one full day.

I mixed this in a bucket before putting on new EVPM roof coating. We didn't power wash, but scrubbed using a nylon bristle brush. It really made the old EVPM roof barrier tacky for paint. Saved a jug of it for my next RV roof project. If you care about your decals, you should cover them with plastic. This will cause them to lose adhesion.

I followed the instructions and videos exactly, tape your RV and wrap it in plastic sheets to protect it. Be prepared for it to get under the plastic and rinse it off immediately

Goes on smooth. Great bonding layer for the top coat.

Easy to use and look great!

Very pricey for the amount you get, put it on a RV roof

Worked as described

Worked well on roof of my RV

This product cosmetically performs perfect. Makes the RV look half its age. It does NOT seal the roof. Leaks of any size, from nail holes to larger sun overexposed cracks or dry rot. I did follow instructions, bought the entire recommendation of assorted cleaners, strippers, etc.

works great

It must work because the old roof came very clean and the new roof adhered and never came apart in five years

easy to use.

I think it chemically prepped the black areas, but it left a slight white film. Maybe it's supposed too. The instructions say to spray off with pressure washer until no more bubbles. I used a soft brush on a medium handle and a spray hose, and it took literally about 10 passes to get it to stop making bubbles when spraying off. A lot of work!The first couple passes I used a regular restaurant detergent similar to simple green. I used this product full strength on part, and then just spread it around with the brush on top of already wet surface for the rest. I don't think it needs to be full strength, because it acted the same at least from a macro level and it doesn't look like it is highly pH dependent, though the msds did say an acid in it. It stinks quite a bit and so it seems to be some chemical activation.Anyway, it takes forever to get the bubbles to stop, but I wanted to do it 'right'. It definitely cleans it better compared to scrubbing with rubbing alcohol, so it was doing something. I wouldn't recommend skipping it before any of the acrylic based roof coatings. I've heard of them peeling up without good prep from an honest dealer repair shop. There are a couple of actual 'rubber roof coatings' that are made of rubber, not just acrylic to coat a rubber roof (see the ambiguity of that name?). They are more expensive, but could probably save from a full roof redo. Don't use the silicone coatings like the Henrys Tropicool at home depot, because nothing will ever bond to it without some major chemical activation.Time will tell. I'll try to update if I see any major differences in the test areas after 5 or 10 years if possible.

Worked well, made roof coating adhere well