PROSOCO FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals

Good quality

Stuff beats out the blue brand - in any comparison; tooling on, resiliency, adhesion - you name it, it's better.The only ding is calling it Roll-on and the pot life. The stuff is like thick honey, you are not rolling it on you are smearing it on - switched to the tube version, so much better. Make sure you have the windows ready to go given the pot life - I usually get about 7/8 windows per 2 gal.

Using on a commercial site to set patio doors on a concrete substraight. A little thick to roll but brushing works good. Really cool product, drys to a rub like substance and so far the doors are installing great with no leaks.

PROSOCO FastFlash is a fluid-applied flashing membrane designed to ensure buildings are both waterproof and airtight. It’s particularly popular among contractors and builders for its ease of use and reliable performance. Here's an in-depth review based on its features, application, and overall effectiveness.

Broke the handle out of my brand new Wooster roller frame within 2 minutes. Much thicker than I expected. Wound up using a 3" chip brush to do 9 windows, basically just globing it on and smearing it out the best I could. The overhead will leave drips no mater what and you'll have to trim 'em off with a razor knife when they firm up. A thick skin will form in the bucket overnight if you don't use it all at once. It is very tough stuff once it sets up and I don't think you have to worry about any water penetrating it, however, I feel like I spent too much money on it when a good flashing tape would have been sufficient and much cheaper/easier/quicker. I would recommend getting the kind that comes in the sausage tubes and you spread it with a bondo type blade if you're planning on using anything other than tape.