Prosoco R-Guard Fast Flash

Pay attention to the date of manufacture, it has a shelf life of 12 months. Like others mentioned, product arrived 3 months out of date and didn't properly cure. This is a basic silyl modified polymer, there are lots of other better products out there. I ended up going with 3M Adhesive Sealant 740 UV, which was half the price and a much better product.

I became aware of this product from the You Tube channel , The build Show , Matt Risinger. When the flashing membrane I was using for my new window came loose , which I would never known if it hadn't been for the fact that I was running behind on my project, I ordered R-Guard. It was a bit tricky getting it in all the places being this was for an upgrade to a larger window. What an awesome product. I purposely did not close the brick veneer up on my window to make sure it would work. Results are awesome.

Applied product to pored concrete wall and sill plate. 1 1/2 inches on each to seal the sill plate and stop bug and air/water infiltration. Went on smoothly. Glad i saw this on the Build channel.

At first you will hate this product. It will feel messy and you will use way to much and think it's to expensive. After a couple windows you will get much cleaner with it. The best part to me is how it seals air out. After windows are installed you can't feel a draft whatsoever and this is before you foam the window. Not to mention I know my windows will never leak. Is it expensive yes but the flashing tapes aren't cheap either and are a pain and they aren't perfect by any means especially if your openings aren't great or brand new. You can coat a cardboard box with this then fill with water. It will not leak. Then you can put a screw through the box and it still won't leak. You can see a video of this on YouTube. I can now do a 36x60 window which had extremely large jams at 8.5 inches. Did inside and out around insulation lockouts. This one window took less than 1 tube of this. If your doing a normal window with normal jams you would use alot less. If you are using more you are using to much. It spreads along ways but doesn't feel like it will so it can be easy to use to much. The other product joint and seem filler is awesome as well. I'm just a homeowner putting my own windows in and wanted the best product I could find. I also do not believe foam alone stops air drafts well as other windows I have without this leak air like a siv around the interior casing and I had to caulk them. No such problem with this product before foam

Product was fully expired when received. Only out a week. I used it anyway as it went on a personal project but would never have installed it on a job.It is excellent product though!