High-solids, moisture-cure silicone demands equipment that standard paint sprayers can't deliver. This guide covers what you need, why you need it, and which system is right for your operation.
Industry-standard silicone rig
HydraStroke technology
SILICONE ISN'T PAINT. YOUR RIG CAN'T BE EITHER.
High-solids, moisture-cure silicone roof coating contains 95%+ solids content — far thicker and more viscous than acrylics or elastomerics. It won't atomize properly below 5,500 PSI. It cures on contact with atmospheric moisture, meaning your hose, gun, and fittings must be moisture-free at all times.
Standard pickup tubes won't feed it from a drum. A repurposed paint sprayer won't generate the pressure to atomize it. This chemistry requires purpose-built equipment — and this guide tells you exactly what that means.
Never share hose, gun, or fittings between silicone and acrylic materials. Even trace amounts of acrylic contamination in a silicone line will cause premature curing and equipment failure. Silicone lines must be purged with silicone-compatible thinner only — never water. Label your hoses and keep them physically separate.
THE THREE NON-NEGOTIABLE EQUIPMENT REQUIREMENTS
High-solids silicone requires a minimum of 5,500 PSI working pressure at the gun tip for proper atomization. Most manufacturers specify 6,000–7,250 PSI. An underpowered sprayer will not atomize the material — it will stripe, run, and produce uneven mil thickness. Do not attempt to compensate with a larger tip.
Silicone will not self-feed through a standard pickup tube from a 55-gallon drum. A 5:1 transfer pump — air-driven, 20 CFM compressor minimum — pushes material consistently from drum to sprayer. Without it, you get starvation, pressure drop, and inconsistent coverage. This is not optional for production drum work.
Silicone cures by absorbing atmospheric moisture. Standard hose allows moisture infiltration through the wall. Use only moisture-resistant jacketed hose — 3/4" ID minimum, rated for 7,250 PSI. A 50-ft 1/2" whip hose at the gun end is standard practice for control and reduced operator fatigue.
| Recommended Tip Size | .029 – .035 (standard high-solids silicone application) |
| Gun | Graco XHF — engineered for high-solids, solvent-based, high-pressure materials |
| Tip Extension | 20" gun extension standard — keeps operator back from overspray zone on rooftop |
| Pressure at Tip | Minimum 5,500 PSI · Typical operating range 6,000–7,250 PSI |
| Main Hose | 3/4" moisture-resistant jacketed · 250–300 ft for roof work from ground level |
| Whip Hose | 50 ft, 1/2" ID at gun end — improves maneuverability and reduces fatigue |
| Do Not Thin | Never add thinner of any kind. Thinning disrupts cure chemistry and voids manufacturer warranties. |
Graco GH 933 Big Rig
Gas Hydraulic Silicone Roofing System
For 30 years, the Graco GH line has been the go-to for contractors who need maximum pressure for hard-to-atomize materials. The 933 hits the 7,250 PSI ceiling that high-solids silicone demands, while the QuikChange pump lower system means you can swap to a high-flow lower for acrylic work — one rig, full-spectrum roofing capability.
| Engine | Honda GX390 — 390 cc, 13 HP, integrated fuel tank, Oil Alert |
| Max Pressure | 7,250 PSI |
| Max Flow | 2.7 GPM |
| Drive System | Gas hydraulic — no external air compressor required for sprayer |
| Pump System | Xtreme Pump with QuikChange lower — swap fluid sections in the field without tools |
| Hydraulic System | 4-gallon reservoir · Return-line filter · O-ring sealed · No hydraulic reset button needed |
| Frame | Ruggedized enamel steel — converts to skid mount in seconds |
| Cooling | Large reservoir + proven cooler/blower system for all-day operation |
| Trail Sprayer Package Hose | 270 ft moisture-resistant hose included |
| Feed Pump | IPM 5:1 transfer pump for 55-gallon drums — included in Trail Sprayer package |
| Gun | Graco XHF spray gun + 20" extension — included |
- Graco GH 933 gas hydraulic sprayer
- 270 ft moisture-resistant jacketed hose
- IPM 5:1 transfer pump for 55-gallon drums
- 20" gun extension
- Graco XHF spray gun
- All fittings and connections
- Ready to spray — out of the box
Graco 933 available at Trail Sprayer
$1,000/day · $3,000/week
$500 deposit · Call 330-720-2966
Titan Hydra X 7230
HIGH-PRESSURE SILICONE ROOFING SPRAYER
The Hydra X represents a fundamental engineering departure from clutch-based hydraulic systems. HydraStroke Technology uses electronically controlled hydraulics with a single moving part — delivering consistent output under load all day without the heat and clutch wear that shortens service life of traditional hydraulic machines under high-viscosity silicone loads.
| Max Pressure | 7,250 PSI |
| Multi-Gun Capability | Up to 5 guns simultaneously |
| Drive System | HydraStroke — electronically controlled hydraulics, single moving part |
| Fluid Section | Severe Service — 5" slow-stroke piston, Tri-chrome corrosion + abrasion treatment |
| Drum Handling | Electric AutoLift system — raises and lowers fluid section at the press of a button |
| Dual-Mode | Switchable to 4540 fluid section (4.0 GPM) for high-volume acrylic production work |
| Cooling | Dual-fan system, optimized for continuous all-day operation |
| Frame | Heavy-duty steel, 12" pneumatic tires |
Traditional hydraulic systems burn out clutches under continuous silicone loads. HydraStroke's single moving part reduces heat, extends service life, and delivers consistent flow rate throughout the day — even when material viscosity changes with temperature.
Press a button — the fluid section raises or lowers automatically. No manual lifting, no dedicated crew member managing the immersion pump. On a full production day with multiple drum changes, this adds up to measurable time savings.
The Hydra X's modular fluid-section design means you don't need separate rigs for silicone and acrylic work. The 7230 section handles silicone at 7,250 PSI. Swap in the 4540 section for high-production acrylic at 4.0 GPM. Trail Sprayer can configure the system for your material mix and carries fluid section kits in stock.
Titan 7230 available at Trail Sprayer
$1,000/day · $3,000/week
$500 deposit · Call 330-720-2966
933 VS HYDRA X — WHICH IS RIGHT FOR YOU?
| GRACO GH 933 | TITAN HYDRA X 7230 | |
|---|---|---|
| Max Pressure | 7,250 PSI | 7,250 PSI |
| Drive System | Gas hydraulic, clutch-based | Electronic HydraStroke — 1 moving part |
| Max Flow Rate | 2.7 GPM | 3.0 GPM (7230 fluid section) |
| Multi-Gun | 1 gun standard | Up to 5 guns simultaneously |
| Dual-Mode Flexibility | QuikChange pump lower | Modular fluid section swap |
| Drum Handling | Manual immersion pump | Electric AutoLift system |
| Best For | Full-time silicone contractor, proven 30-year platform | High-production, multi-gun, silicone + acrylic mixed operation |
| Rental Available | YES — $1,000/day | YES — $1,000/day |
RECOMMENDED HOSE & GUN CONFIGURATION
| Main Hose | 3/4" ID moisture-resistant jacketed — 250 to 300 ft for roof work from ground |
| Whip Hose | 50 ft, 1/2" ID at gun end — improves control and reduces fatigue |
| Total Hose Run | Do not exceed manufacturer PSI rating for total hose length. Verify with product TDS. |
| Gun | Graco XHF — rated for high-solids, solvent-based, high-pressure materials |
| Tip Size | .029 – .035 for standard silicone application |
| Extension | 20" gun extension — keeps operator clear of overspray zone |
| Separate Lines | Dedicated silicone-only hose set. Never share with acrylic lines. Ever. |
COVERAGE REFERENCE
General reference only. Always verify against your specific product's Technical Data Sheet before quoting.
| Base Coat (16 wet mils) | ~1 gallon per 100 sq ft |
| Top Coat (24 wet mils) | ~1.5 gallons per 100 sq ft |
| Typical 10-Year Warranty Rate | ~2–3 gallons per 100 sq ft total system |
| Wet Mil Gauge | Use a wet mil gauge during application — verify thickness and adjust technique in real time |
MORE THAN A DISTRIBUTOR
Trail Sprayer & Service is an authorized distributor for Graco and Titan — and a full-service equipment operation. The same team that sells you the rig can repair it, rent you a replacement while yours is down, and help you match your system configuration to the specific silicone product you're applying.
Factory-authorized service and genuine replacement parts for Graco and Titan equipment. Fluid sections, pump lowers, hose assemblies — in stock for fast turnaround. Service and repair available on-site or shipped.
Silicone spray systems by the day or week. Graco 933 and Titan 7230 available. $1,000/day or $3,000/week. $500 deposit. Ideal for contractors entering silicone work before committing to purchase — or when your primary rig is down.
Every silicone product is different. Trail Sprayer's team can match your equipment configuration to your specific material manufacturer's recommendations — tip size, operating pressure, hose length, feed pump setup.
Adding silicone roofing to a spray foam operation? SprayWorks Equipment Group — also a Knox company — supplies spray foam rigs, materials, and contractor training. Together, Trail Sprayer and SprayWorks give contractors a single-source solution for both spray polyurethane foam and silicone roof coating systems. Call SprayWorks at 330.587.4141.
| Minimum PSI at gun | 5,500 PSI — do not spray below this threshold under any circumstances |
| Hose | 3/4" moisture-resistant jacketed — dedicated silicone lines only, never shared with acrylic |
| Feed pump | 5:1 required for 55-gallon drums · 20 CFM compressor minimum |
| Tip size | .029 – .035 · Gun: Graco XHF · Extension: 20" |
| Do not thin | Never add thinner — disrupts cure chemistry, voids manufacturer warranty |
| Moisture exposure | Open containers cure immediately — seal between passes, purge with silicone-compatible thinner at end of day |
| Weather window | 50°F – 120°F · No rain within 24 hours · Check wind speed and direction before starting |
| Dedicated lines | Never share hose, gun, or fittings between silicone and acrylic materials — ever |