Liquid Flash | 20 oz. Sausage Pack | Weather-Resistant | Flashing Sealant (20oz Sausage)

This stuff is amazing, especially if you can get someone else to apply it for you. I used around the perimeter of my new build, and for lots of nail holes, but I got it everywhere. By the end of the project I had to throw away the caulk gun because it was all over the gun, but this liquid flash really sticks so I guess you know it works. Make sure to prep ahead for best results and use gloves. You can also fill in big gaps with foam or other material then seal with the liquid flash to avoid wasting since it isn’t cheap.

We used this product to air-seal a new house and waterproof the window sills. There are many areas that are very difficult to tape, yet are too exposed for spray foam to last. Our solution was to use tubes of this throughout the house. We also used this on all the window sills, which worked out well since we had a window that was broken in transport and was taped off when installed. During a rain storm, water got around the tape and sat on the sill for 2 days before being wiped up. No water penetrated this product and got onto the wood sill. Because of this, we are confident that if water somehow makes it past the window caulking in the future, it will either sit on this product till it evaporates or hit the drywall and be noticed quickly (no hidden rot potential). It is also very tough once cured. I watched an installer slide a window across the sill and put a slit in the cured product. After I mentioned this, we both looked at the slit and realized that it was partially healing itself (and it didn't go all the way to the wood). This product worked great as an air seal and allowed us to seal many places we couldn't figure out how to previously. It is easy to use, however I recommend the Milwaukee 29oz caulk gun set to 2 or 3 if you are going to use it much (do not set higher unless you want to figure out really quick how to fully disassemble and clean the caulk gun). It also cleans up well with standard acetone or mineral spirits (so don't set the gun to 5 and think you will be done faster). All in all, this is a great product and I keep finding new ways to use it.

Decided to re-side my garage with new 4 x 8 LP Smartside panels. Existing siding is also 4 x 8 plywood paneling in rough shape paint-wise but still pretty solid. There were a few spots where the old paneling was below grade and got moisture damaged. Basically the inch of siding that overhangs the slab. Not wanting to pull all the old paneling I decided to just go over it with new. I trimmed out the bad spots with a rotating tool and then used this to seal and flash the old paneling. Bought a sausage gun on Amazon as well as the angled tips. Amazed at how much easier sausage guns are to use compared to the traditional caulking guns. I watched a YouTube video of a guy using a similar product called Procoso R-Guard Fast Flash. I didn’t like that it was pink/red. I was going to buy them from Amazon and noticed this as a recommended product. I like that it’s black, especially since in my case the bottom of it will be visible on the slab that is exposed and above grade around my garage. I fixed the grade around the garage and then used light green 3m Rough masking tape about an inch below the old panel so I could pull it and get a straight line when I was done. Worked really well. This stuff will stick to about anything. I ran a bead on the underside lip of the panel, also on the very bottom face of the panel (about 1.5 inch), and also the exposed slab below the overhanging panel. Then used a chip brush to spread it just like the video I watched for the other product. Basically creating a painted on Z flashing. Again very happy with the result. I did this in Nebraska in June which was high 80s and 90s temps over two weekends and pretty humid. No issues with not sticking. I did sand the old panels with a power sander where this stuff was going so I could remove all the peeling paint and have a good surface for it to adhere to. Stuff is very sticky. Use nitrile gloves, lots of them. And wear old crappy clothes. I did one side of the garage at a time. Stuff starts to skin over within an hour, it’s still very tacky, and you can keep painting on more if you’d like. Pulled the tape at the bottom once I finishing painting a full side of the garage and it had started to skin. Tape comes off no issue and flash falls back into place with a fairly clean line. Basically feels like a tacky rubber after it dries. I’m happy to find a solution for flashing the bottom sill in my unique situation on an old garage where the mud sill is sitting right on the slab. It’s sealing all the cracks from pests, making the sill more air tight, and water proofing all at the same time. The uneven parts I had where I cut away the rotted parts of the plywood were no issue to seal with this as it sticks to anything you paint it on. The only question unanswered for me at this point is how long will it last? Tube says 30 years but I never understand how a product just coming to market can know that? I did try using the plastic spreader on one side as that is how Zip shows to put it on. I bought cheap yellow automotive ones from Amazon. But found in my case with the overhang of the panel, it was easier to use a 1inch chip brush. The plastic spreaders may be great for doing mud sill boards before installing on new construction but again in my unique application they weren’t the best. Plan to run 1x4 PVC Water boards on the bottom, over this liquid flash to make my new panels sit 6 inches above grade like they are supposed to. Hope is the bottom exterior edge won’t rot out on me by using this and PVC boards. Time will tell. I ordered from the Huber 3rd party reseller and each tube came inside a sealed plastic bag. Might be worth ordering your tubes without other products that can poke holes in the tubes just in case. Mine were all new tubes that wasn’t expired. My garage is 22’ x 18’ and I ordered 11 tubes not knowing how much I’d end up using. I probably could have bought 8 and been fine for what I did.

This product was exactly what I needed. I purchased a house that had nooks and crannies that were letter mice, squirrels, bugs and rain in. After some minor siding repairs (really a bandaid till I can reside the whole thing) I was left with some hard places to flash. I filled most of the cracks with concrete gap filler, then topped it all off with this liquid flashing. It went on smooth, was easy to use, set up pretty quickly, and then I was able to use some metal L flashing on top of it. 99% of the pests and water have stayed outside!! I sprayed it with a hose in the summer before we painted, NOTHING got past it.

Great product but how to apply this stuff without making a total mess is something their engineers should figure out and include an applicator!

These are expensive but I did my whole waterproofing of my baseboards with this.

Great product but messy. Not a fan of using it in window and door openings anymore. Too time-consuming and messy Plus you have the pretty much wait for it to dry to set a window. Use zip tape for that. I like this product for sealing the sheathing to like a concrete slab. Nail penetrations as well.

First time using this as I have seen and heard all great things online. Application was going well, and I was happy, but thinking the coverage was not going very far. I had my m18 caulk gun on low speed. Once tube was “empty” I go to remove it and find the back of the tube had exploded and over have the liquid flash is left in the tube. Makes a giant mess of my gun (probably ruined because it’s in the gear advancing system). I bought 2 tubes. This was the first one. Scared to try the second. At the price this stuff costs I didn’t expect to trash a m18 caulk gun with it.

Good product, but it's very expensive almost not payable for big project.