VS309 — A BETTER WAY TO HANDLE CONCRETE SLAB MOISTURE
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Excess moisture in a concrete slab can ruin flooring and delay a project. The conventional fix is
a two-part epoxy moisture-vapor barrier (an "MVE" system). VS309 achieves warranted moisture
mitigation a simpler way — and FST will show you exactly what that means for your project's cost,
schedule, and sustainability goals.


THE CONVENTIONAL APPROACH (EPOXY MVE)
  - Requires shot-blasting the cured slab to a CSP-3 profile before the epoxy is applied — an
    added surface-prep step, cost, and clean-up.
  - Adds days to the schedule: it is a separate operation after the slab cures, and flooring waits.
  - Uses two-part epoxy resins that are bisphenol-A/F based — chemicals on the ILFI Red List,
    which can count against LEED material-ingredient and healthy-materials goals.
  - Carries embodied and transport carbon from the epoxy material itself.


THE VS309 APPROACH
  - Applied day-of-pour — no separate mobilization, no slab shot-blast prep, no schedule delay.
  - Warranted moisture mitigation you can build on.
  - Uses no epoxy moisture-vapor barrier — so it introduces no Red List chemicals, a clean story
    for LEED MRc4 material-ingredient credits and Living Building / healthy-materials projects.
  - Lower embodied and transport carbon than an epoxy system.


WHAT YOU SAVE
  Cost      — the VS309 vs. epoxy product difference, plus the surface prep you no longer pay for.
  Schedule  — no moisture-mitigation delay; correction work stays localized so the overall
              project schedule keeps moving.
  Carbon    — avoided epoxy embodied + transport CO2, plus avoided prep energy and materials
              (counts toward your project's LEED / whole-building carbon story).
  Materials — no Red List / BPA chemistry introduced into the building.


A REPORT BUILT ON YOUR NUMBERS
FST provides a project-specific comparison — cost, schedule, and LEED/CO2 — as a clear, branded
PDF. Every assumption is itemized and set to your project's real quantities, pricing, and
location, so you see a like-for-like picture rather than a generic claim.


Ask your FST representative for a VS309 comparison for your project.
fstconcrete.com