Gaco Commercial Roof Coating Systems: Complete Guide

RSP Painting is a certified installer of industry-leading Gaco Roof Coating Systems across all 50 states. Using our high-output Graco Reactor 30 spray rigs and full-time employee crews, we restore aging flat and low-slope commercial roofs with GacoFlex 100% silicone technology. This creates a seamless, flexible barrier that ends leaks, withstands permanent ponding water, and eliminates the heavy expense of a complete roof tear-off.

Core Performance Features & Advantages

  • Ponding Water Resistance: GacoFlex 100% solvent-free silicone coatings do not soften, bubble, or degrade under standing water—making them ideal for flat commercial roofs with low spots or slow drainage.

  • 85%+ Solar Reflectivity: Highly reflective white silicone bounces UV rays away from the building, keeping roof surfaces up to 60°F cooler and cutting HVAC energy costs by 15% to 30%.

  • Superior Adhesion: Gaco primers allow direct application over almost any roofing substrate, forming a permanent chemical bond that resists wind uplift and thermal expansion.

  • page100% Tax Deductible in Year One: Qualifies under IRS Section 179 as a building repair and maintenance expense rather than a 39-year capital depreciation item.

  • Long-Term Protection: Backed by 10-year to 20-year non-prorated manufacturer material and labor warranties.

Step-by-Step Gaco Installation Process

Surface Washing & Preparation
Removes dirt, oils, and loose chalking

The entire roof deck is cleaned using eco-friendly GacoWash concentrated cleaner and high-pressure power washers to ensure a completely clean surface for maximum adhesion.

1. Seam Detail & Fastener Sealing
Ensures structural integrity before coating

2. All seams, flashings, HVAC penetrations, and metal fasteners are reinforced using GacoFlex Liquid Seam Tape and structural mesh.

3. Specialized Gaco Primer Application
Locks down difficult or oily substrates

4. Substrate-specific primers (like GacoFlex E5320 for metal or single-ply) are applied to lock out rust, block asphalt oils, and enhance bonding.

5. Seamless GacoFlex Silicone Topcoat
Applied at high pressure using Graco Reactor 30 rigs

Our technicians spray-apply a uniform layer of GacoFlex silicone across the field of the roof, curing into a monolithic, rubberized waterproof membrane.

 

Frequently Asked Questions

What makes Gaco silicone better than standard acrylic roof coatings?

Acrylic coatings are water-based and degrade when exposed to standing or ponding water. Gaco’s 100% silicone formula is completely hydrophobic, meaning water sits on top of it without breaking down the material, peeling, or cracking.

Will a Gaco roof coating interfere with my normal business operations?

No. Because Gaco systems are sprayed directly onto your existing roof assembly, there is no noisy tear-off, no heavy debris dumpsters, and minimal noise. Most commercial applications are completed while your business operates as usual.

Can Gaco coatings be applied over an existing TPO, EPDM, or metal roof?

Yes. Gaco products are engineered to adhere to virtually all commercial substrates, including single-ply membranes (TPO, EPDM, PVC), standing seam and corrugated metal, modified bitumen, built-up roofs (BUR), and sprayed polyurethane foam.

Are Gaco roof coating systems covered by warranties?

Yes. As an authorized installer, RSP Painting provides 10, 15, and 20-year GacoFlex material and labor warranties that protect your facility against leaks and material degradation.

RSP | 800-538-6723