This is a good product. Another good use is on exterior walls where rain splashes from ground back onto walls. Paint flakes off of walls. I brush off flakes, then apply Through The Roof, then paint. Or paint then apply TTR. Both methods work.

This stuff is a fantastic solution to a roof leak. I have three flat patios; one above my office, dining room, and front porch. I could not pin down two leaks, so on two patios, I just emptied a gallon and rolled it out with a paint roller onto the gravel on the fiberglass roof. I got the strange idea to throw vermiculite over it all, and it looks so professional, better than the original, and not slippery when wet! The vermiculite gives some UV protection and a nice texture and binds well to the stick product.

One of my roof trusses had broken, on a knot in the wood, close to the edge of my roof. It created a low spot that allowed water to pool in one spot. I didnt know any of this until I saw a wet spot on my ceiling. I ordered this to get me by until I could make a repair. Well long story short, it wound up staying on the roof for over a year. I never had another leak. Great stuff.

Easy to apply. Used on metal roofing and my boat.

This was recommended to me by a contractor when I needed to waterproof a roof from which shingles had blown off. It lasts a long time and is clear so it is not obvious. It has got the roof through periods when it is too wet, cold or slippery to repair.

Takes awhile to cure but seems to do a good job.

I used this to touch up wind-worn shingles. Seems to work well and is easy to apply; it is quite thick like runny honey.

We tried a few different sealants to patch roof on our trailer slide. This is the only one that did the job. Works exceptionally well.

This stuff is great - we had a leaky Suntuf roof and used this to seal the joints. Easy to put on, dried clear so you can't see it and now we're leak free! Except for the spot I missed, but that's my fault and not the product. =)

So I purchased 4 quart containers of this sealant a few years ago with intentions to do some repairs that were actually not necessary following some roof reconstruction. That said, this stuff sat in my shed for around 4-5 years before I had a chance to use it (not climate controlled - full swing of weather in the NE). I was afraid that like caulk tubes this very expensive purchase would be a loss but I was pleasantly surprised to find that all 4 containers stayed viable!I had a small leak in my roof SOMEWHERE that I could not pin down. I decided to just hit every possible infiltration point with this sealant and see (roof vents, waste line vents, a few cracked shingles, etc.). Well, one of the spots I hit must have been the leak point because months later there's no further leak evidence even following some pretty horrific rain storms.I am so happy with the results that I wanted to share a few things I learned while using this sealer.1) I see a lot of people recommend foam brushes for this stuff, but I would counsel getting short utility paint brushes instead. My asphalt shingle roof would have shredded the foam brushes and the traditional bristles of the utility brushes I purchased let me really get into the cracks with the sealant. Also - the bristles are a bit stiffer than many foam brushes - good for getting the last of the sealant out of the jar, especially as it starts to cure.I used a 2" wide brush (with 1" long bristles) which just fit into the mouth of the quart jar. I got a box of these things for peanuts a long while ago and still haven't run out of them.2) A note about the curing... some other reviewers mentioned getting gallon containers instead of the quart size containers. Do this ONLY if you are going to use this stuff all at once and relatively quickly. I was very careful to recap my quart jar as I moved about the roof and I still barely got to the bottom of the container before it started to gel up to the point it became unusable. Unless you have a big project, get a bunch of quart size jars so that the most you will use/lose per job is one quart.Plan your job ahead of time so that you will spend the least amount of time after jar-open.3) Plan to lose what you don't use. I carefully re-capped what little I had left in the last quart jar I was using - even did the "breathe into the jar for CO2 layer" trick and the stuff still completely cured within hours. Once air gets into the jar the timer starts ticking.4) Be careful cleaning up. I got this on my extension ladder, jeans, shirt, shoes, etc. I was wearing work clothes and work gloves so no problem there, but you would NOT want to get this on anything you care about. One unexpected bonus - the work gloves I was wearing now have a water resistant side - the sealant coated the palms and fingers of the work gloves and they are still flexible and workable!5) Be aware that this sealant is somewhat shiny when cured - so if your roof is visible from ground level, the repair patches will be noticeable if you're looking. It's not "ice in the sun" shiny, but on an asphalt roof it stands out. I don't care because anything was worth nailing that leak, but it's something to take into consideration.The net sum is that this sealant really works, sticks to anything and everything, and is still pliable and well adhered almost a year later after being applied to a swept but weathered roof in full exposure to the elements. I can only hope that it lasts until it's time to re-shingle the roof again.

This stuff is amazing: it's like silicone sealant that you apply with a brush. It's slightly thinner than silicone, so that you can easily brush it flat over a large area, but plenty thick enough to stay put when you brush it into cracks, grooves and gaps. I was particularly pleased how well it adhered to the irregular roof surface (asphalt shingles, flashing, and roof cement used for previous patches). Some of the shingles were damp, which didn't affect adhesion at all. The directions say you can apply this when it's raining, but I waited until there had been no rain for about 12 hours.Here's how to do a perfect job:1. Buy a package of foam brushes like these: . 2 inches is the perfect width: narrow enough not to collapse when you push the sealant hard into cracks, but wide enough to spread nice layers of sealant over big flat surfaces. I used two foam brushes per quart: when one starts to self destruct from brushing into cracks and against rough shingles, toss it and grab a new one.2. I used a leaf blower to remove all the leaves quickly.3. For cleaning the roof, you also need a hand brush like this one: , or one that comes with a brush and dustpan set (you don't need the dustpan.) This is the ultimate tool for cleaning the roof, because it gets rid of all the loose stuff. That's the only cleaning you need to do: get rid of the loose dirt, stone granules and leaves. Make sure to keep the brush away from the sealant! I tried using a broom at first, but it didn't clean into the little cracks, which the whole reason I was up there. This hand brush works better. A paint brush could work as well.4. USE RUBBER GLOVES! This stuff is SUPER STICKY. It is much tougher to get off your hands than silicon caulk. Also wear old clothes...and resist the urge to wipe your hands on your pants! I brought a rag for wiping.5. The directions say you can spread a layer 1/8-1/4" thick (3-6 mm). I think if you spread a 1/4" thick layer, you are probably being sloppy and making a mess. 1/16"-1/8" (2-4 mm) is a good guideline.6. Start at the visible cracks, and jab the sealant into the crack with the brush, then wipe sideways to fill the crack with sealant. It will stay where you put it, but the best way to get a good seal is to embed the sealant deeply into cracks, then brush a nice smooth layer over the top.7. In some cases, you will be applying over previous sealant like black roofing cement. In my case, there were visible cracks several inches long in the old roofing cement patch. After sealing all the visible cracks (see #6 above), I painted a smooth layer over ALL the visible roofing cement, plus two inches or more beyond. If some of the old roofing cement patch is cracked, the rest will crack within a few years, so seal it now!8. I had trouble removing the last bit of sealant from the jar. The foam brushes are a bit too short and too weak to scrape from the bottom corners. A paint stirring stick might help here.9. Bring a trash bag with you onto the roof. As you finish with brushes and jars of sealant and rags and gloves, throw them immediately into the trash bag. Wipe your gloved hands on the inside surface of the bag. Carefully haul the bag straight to the trash can when you are done. You REALLY want to keep this stuff off your clothes, shoes, etc. and because it is clear, it is a bit harder to notice than black roofing cement.10. I purchased two quart jars to seal around four roof vents. If you are going to the trouble of sealing the roof, buy plenty. I may buy the gallon size next time, but I'll always keep a quart jar around for emergency repairs.