Prosoco R-Guard Fast Flash

Exploded in my $50 gun. What a mess.

Fantastic product, goes on easy, spreads with a bondo or stiff putty knife. First saw this on Risinger’s Build show on YT a couple of years ago. Wear gloves when applying. Already done 3 windows with this, will do 3 more this fall.

This stuff works amazingly well it. is definitely Next GEN technology. that said it is much more expensive than using plastic or tarpaper and requires 24 hours of set up time before you can install the window so you’re going to need an extra day. If you do the full system which is a two-step process again then you’ll need two days extra. Buy The small spreaders and use gloves the stuff tends to get everywhere.

We really like this product

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 Like others mentioned, product arrived 3 months out of date and didnt properly cure.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.

At first you will hate this product. It will feel messy and you will use way to much and think its 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 cant 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 arent cheap either and are a pain and they arent perfect by any means especially if your openings arent 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 wont 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 doesnt feel like it will so it can be easy to use to much. The other product joint and seem filler is awesome as well. Im 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

Great window and door flashing product. When applying this you can tell right away that it will not let water in. Start from top of opening and work your way down.

Loved this product. Turned my sons room from the cold to the nicest. Great for air and water proofing. Super tight.

Great stuff, easy to use and does exactly what it’s supposed to. Make sure you’ve got a sausage gun. Won’t work in a regular caulking gun.

Great product! Good value