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🛠️ Build smarter, weatherproof stronger — don’t get left out in the rain!
Prosoco Cat 5 is a professional-grade, fluid-applied air and waterproof barrier designed for easy roller application across all climates. It delivers 50-100 sq.ft. coverage per gallon, bonds and cures on damp surfaces without priming, and forms a durable, breathable membrane that resists tearing and weather exposure. Free from solvents, isocyanates, and phthalates, it ensures safer application and compatibility with most building materials and sealants, making it the go-to choice for modern, resilient construction.
| ASIN | B00OBSOUV2 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #319,642 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,275 in Industrial Sealants |
| Color | Red |
| Coverage | 50–100 sq.ft. per gallon on Smooth surfaces, less on porous materials such as CMU |
| Customer Reviews | 5.0 5.0 out of 5 stars (8) |
| Date First Available | October 9, 2014 |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 67 pounds |
| Item model number | PRS-70430-05GAL |
| Manufacturer | Prosoco |
| Material | Silyl-Terminated-Polymer (STP) |
| Part Number | 70430-05GAL |
| Product Dimensions | 13 x 13 x 16 inches |
| Usage | Outside; Professional, Fluid Applied Air Weather Barrier |
R**Z
Shipping was faster than any wholesaler could deliver.
Giving the shipping speed five stars. I ordered on a Friday and it arrived the following Wednesday. My local wholesaler was giving me 1-2 week delivery. As for the product itself, its easy to apply with a roller, but it can get messy. You have to mix it for five minutes before you can roll on. I used 1.5 buckets for 3 sides of an 1100SF house. I also did two coats. I used the remainder as waterproofing in the bathroom. We then added hardie siding directly on top of the Cat 5. I used the full system, fast flash for the windows and joint and seam filler, which my local wholesaler had in stock. This is my first time using this product so only time will tell if it's truly effective.
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