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

4.7/5
Product ID: 72831754
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💧Waterproof
🔧Easy Application
☀️UV Resistant
Frequently Bought Together

Description

🔒 Seal the Deal with Confidence!

  • BREATHABLE SEAL - Allows damp surfaces to dry while maintaining a robust barrier against water and air.
  • WEATHER WARRIOR - Bonds and cures even in wet conditions, ensuring reliability when it matters most.
  • SEAMLESS PROTECTION - Effortlessly detail rough openings and joints for a flawless finish.
  • LONG LASTING DURABILITY - Exposed to UV and weather for up to 12 months without shrinkage or staining.
  • VERSATILE COMPATIBILITY - Adheres to a wide range of building materials without the need for priming.

PROSOCO FastFlash is a high-performance waterproof and airtight fluid-applied flashing membrane designed for professionals. It seamlessly details rough openings, fills joints, and seals around penetrations without the need for flashing tapes. This versatile product bonds to various building materials, cures in wet weather, and provides a durable, weather-tight seal that withstands UV exposure for up to 12 months.

Reviews

4.7

All from verified purchases

M**R

Easy to use, simple and effective - liquid flashing!

Prosoco R-Guard Fast Flash (and related Joint & Seam Filler) works as described to seal the gaps between different building materials. Tape and caulk products aren't all-purpose as liquid flashing products, where you apply a large bead in bulk, and then spread as needed for the situation. Corners, odd shapes, vertical, horizontal, works equally well inside tight spaces as it does across large flat areas. You can push the liquid flashing into cracks in the same way that caulk is applied, plus you spread it out with a plastic fin or other spreader tool. Cleans up easy with paper towels before it dries. The finished product is a rubberish mastic that provides a permanent barrier to water, air and insects.Cure (drying) time is dependent on humidity. If you're working in a very dry environment (e.g. below 50% humidity), a small amount of water misting with a spray bottle will speed things up. I'm in central Texas and find most days that I can spread the joint and seam filler in the morning, and then after lunch apply the fast flash. On especially dry days (humidity below 30%), I'll very lightly mist the substrate before applying the joint and seam filler. A great benefit, rain isn't a worry - you can apply these products and not worry about rain later in the day!The joint and seam filler is pink and reinforced with fibers, designed to fill large gaps between material, goes on very thick and the finished surface isn't as smooth/flat in comparison to the fast flash.Fast flash can be used by itself, or on top of the joint and seam filler. Dark red in color, nearly the same product as the joint and seam filler, but less fiber reinforcement to allow being applied as a thin top-coat that finishes smooth and sexy!Applied successfully at the foundation between concrete and base angle (e.g. sill plate) for metal buildings, workshops, and barndominiums. Works great for commercial and residential construction across a wide variety of materials!

K**N

Good stuff High price

This stuff is good. Easy to work with, but don't do a big area at once, it will tack up easy. Drys rock hard. My only downside is the price, one tube doesn't go very far.If you have a big budget or a small job this stuff works great. Big job small budget! You're going to be let down.

G**G

good stuff that does the job - but take time to mask off and cover the work area

this sealant is surprisingly easy to use and creates a thick and pliable seal around complicated forms. It does have a tendency to drip from overhead surfaces if it is put on too thick. Use the plastic spreader or a chip brush to smooth it out immediately. Use plastic drop cloths, wear gloves, and a work clothes that you don't mind ruining.

M**N

The flashing is for real

It's not cheap, but it does a great job. It dries to a hard rubber consistency which worked really well to flash the tar paper around our windows. We flashed the rough opening first, to seal the tar paper to the OSB, and then flashed a second time after installing the window itself.

S**D

Used to seal windows

I use this to cover/seal around windows. Works great . Its the only thing I found to seal the black gypsum board or whatever it that they used on old houses.

D**D

Amazing

Bond will last a lifetime.Probably the best product on the marketWill tolerate weather changes and most movement if applied thick enough.Is not low costRequires appropriate sized gunDifficult clean up.Once cured, it will take great effort to remove from any surface (not even a power washer will work)Red color not aesthetically pleasing for exposed work.

J**F

Bomber product!

Product is great!Shipped quick.

B**N

Stuff is great but expensive

Works, but a little spendy. Need to sell a 2, 3, 4 pack for cheaper or something

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

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Sorry, this item from our Vanuatu store is out of stock. We're restocking soon—check back or contact support for similar products.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Prosocofastflash Waterproof And Airtight Fluid Applied Flashing Membrane Trusted By | Desertcart Vanuatu