CHIMNEYRX Rx Elastomeric 1/2 Gallon

I really like this product! I like to maintain the flashing around my masonry chimney and I've always done it with a dab of some product here and there, but it is easy to miss an area that might have a gap if it is small. Last year we had an 11" rain here in WI and sure enough, just a small amount of water did leak in around the chimney. With this product you "paint" it over the entire flashing and where it meets the roof and the brick, so there are no missed areas - the entire thing is coated. The product applied quite easily - it's is fairly thick, but it did go on and brush out with a regular paint brush. I followed the instructions and masked the roof and the brick with duct tape and then applied the product. Once done, just remove the tape and you have an amazing looking job! In the on-line instructions the coverage is listed at 14 - 18 sq ft at a thickness of 1/8" for the 1 gallon size. In the Amazon listing it is listed as 12 sq ft, but the product is only 1/2 gallon, so that is not correct. I did 10 sq ft and used about half of the 1/2 gallon container. I would think I must have applied it about 1/16" thick. It is very hard to get an exact thickness when you are applying it.

Purchased this to seal around chimney. Applied it over fibreglass cloth and it worked beautifully. Looks great and stays flexible. Easy to apply.

I was a bit concerned when I opened the shipping box and saw that the lid of the plastic tub had leaked a bit, as though the lid may have popped from pressure during shipping. Sealer seemed ok. We assumed that our interior ceiling leak was from the chimney flashing. The sealer was brushed liberally around and on the flashing. The next 5 days we had heavy downpours. No interior ceiling leaks. Very pleased.

Easy to apply. So far after several rains it seems to be working great.Took about an hour to apply. Easy cleanup with soap and water.

I used this to seal around chimney flashing instead of asphalt cement. The asphalt cracks quickly with sun exposure causing leaks, where this doesn't. It also prevents shingle surfaces missing ceramic granules from leaking. When mix with white primer it makes a grey filler that I use to fill joints in my concrete patio.