GacoCertifiedApplicator.
The industry benchmark for ponding water performance.
Not every
roofer
makes this cut.
We are a Certified Applicator certified applicator for GacoFlex Silicone Roofing Systems — qualified to install and warranty the full system lineup. This certification requires product training, application audits, and documented project verification.
Every system,
specified.
We specify Gaco systems to match your substrate, climate zone, and warranty requirement — not whatever is available. Every application is backed by a manufacturer-issued warranty through our certified status.
Gaco S20
White formula achieves 88% initial solar reflectivity and SRI 107. Cure time: rain-safe in 15 minutes, foot-traffic in 4–6 hours. Temperature range: -60°F to 300°F continuous. GacoFlex S20 is the most widely specified ponding-water-rated silicone in commercial restoration.
Manufacturer Profile
Why we specify Gaco
GacoFlex is the most specified 100% silicone roof coating in the commercial market — engineered from the ground up for permanent ponding water exposure. Unlike acrylic and urethane coatings that re-emulsify under standing water, GacoFlex S20 maintains full adhesion and waterproofing integrity indefinitely. The chemistry is moisture-cured, meaning contact with water accelerates the cure rather than degrading it.
As a certified GacoFlex applicator, we are qualified to install and warranty the full S20 system through the manufacturer. Our crews have completed the required product training, project verification, and application audits to carry Gaco's NDL warranty offering — giving building owners manufacturer-backed protection with zero dollar limit.
Technical Edge
What sets Gaco apart
- 01
Only 100% silicone formulation rated for indefinite ponding water — acrylics and urethanes re-emulsify
- 02
Moisture-cured chemistry: contact with water accelerates cure rather than degrading the coating
- 03
Rain-safe in 15 minutes — the fastest of any major silicone system
- 04
Single-coat application to 20+ mils DFT eliminates the multi-coat scheduling risk of competing systems
- 05
88% solar reflectivity (initial) — top of class for ENERGY STAR commercial flat roof compliance
- 06
NDL warranty includes ponding water explicitly in the coverage language — no carve-out clauses
Warranty Options
Gaco warranty tiers
As a Certified Applicator certified applicator, we can issue every tier below. Warranty selection depends on required dry film thickness, substrate, and maintenance commitment — we document all of this in the written assessment.
Ponding water covered
Maintenance: biennial. Voids if: dry film thickness below 20 mils; unauthorized substrate preparation.
Ponding water covered
Maintenance: annual. Voids if: dry film thickness below 25 mils; skipped annual inspection.
Ponding water covered
Maintenance: annual. Voids if: dry film thickness below 30 mils; skipped annual inspection.
Honest Comparison
When to specify Gaco vs. alternatives
Gaco S20 commands a slight material cost premium over Henry and Mule-Hide silicone but eliminates the re-coat scheduling risk associated with split-application systems. For roofs with confirmed or likely ponding water, Gaco is the only specification that carries zero warranty exclusion for that condition.
Common questions
about Gaco.
Technical questions we field before every assessment on this system.
01Why is GacoFlex S20 specified for ponding water when other silicones aren't?
GacoFlex S20 is moisture-cured — water accelerates the bond. Competing silicones use acrylic carriers that degrade under sustained ponding.
02What DFT (dry film thickness) does GacoFlex S20 require for an NDL warranty?
Gaco's 15-year NDL requires a minimum 25 mils DFT; the 20-year NDL requires 30 mils. We measure DFT at multiple points across the roof and document readings for the warranty file.
03Does GacoFlex S20 require a primer on existing EPDM or TPO membranes?
On clean, mechanically prepared EPDM surfaces, S20 adheres without primer. TPO typically requires GacoFlex GacoSeal primer for bond coat adhesion. We always perform an adhesion pull test before applying the full system.
04What is a GacoFlex Certified Applicator and why does it matter for the warranty?
Gaco's certified applicator program requires product training, application audits, and project verification. Only certified applicators can issue manufacturer-backed NDL warranties. Hiring a non-certified crew means no manufacturer warranty — only a contractor guarantee.
05How does GacoFlex S20's reflectivity affect HVAC operating costs?
GacoFlex S20 white formula achieves 88% solar reflectivity — dropping rooftop surface temperatures by 50–80°F vs. an uncoated black membrane. Studies show 10–25% HVAC savings in cooling-dominated climates.
Services, projects,
and reference material.
Everything connected to Gaco — the services it powers, documented projects where we installed it, and technical content that informs the specification decision.
Ready when
you are.
Get a documented roof assessment from a Certified Applicator certified technician. We evaluate substrate condition, ponding water exposure, and thermal performance — then specify the Gaco system your building actually needs, backed by manufacturer warranty.