PROSOCO
Fluid-applied air and water barriers for durable, airtight residential envelopes.
What they're known for
A Kansas manufacturer whose R-Guard systems are used to control air, bulk water, and difficult transitions in high-performance wall assemblies.
PROSOCO manufactures construction chemicals and enclosure systems, including the R-Guard air- and water-control products used on high-performance residential projects. FastFlash and Cat 5 are designed for transitions, penetrations and continuous exterior control layers where airtightness and water management have to survive real construction sequencing. R-Guard is the part of the company most relevant to the directory: a documented enclosure system rather than a generic construction-chemical catalog.
Notable products
We haven't catalogued their full line in the directory yet. These are the entries worth knowing.
- Catalog entry
R-Guard Cat 5
Vapor-permeable fluid-applied air and water barrier
- Catalog entry
R-Guard FastFlash
Liquid flashing and transition material
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Sources
Facts verified September 2026. Compound is an independent editorial directory and is not affiliated with this company unless stated.