One man.
One hose.
The whole roof.
Jetspray is the airless roof coating machine that mixes, pumps and sprays heavy abrasive and asphalt coatings, so a single operator on the roof can do the work of a full crew with buckets and swabs.
A better way to apply roof coating
Jetspray was invented by a licensed roofer who knew the old way first-hand. The patent describes the job it set out to replace.
The old way
- A man or two on the ground mixes coating in a mixer.
- The mix is loaded into bucket elevators and hauled up to the roof.
- Two or more men on the roof spread it with swabs and buckets.
- Then everybody cleans up.
The Jetspray way
- Pour the liquid into the tank and drop the bag of cement on the loading screen.
- The full-length agitator keeps it mixed while the helical pump delivers it under steady pressure.
- One man on the roof controls the flow at the nozzle.
- Flush with water or solvent and you're done.
"Labor savings alone exceeds 50%." — J. H. Stratley Roofing Company, San Diego, in a 1960s Jetspray brochure.
Everything in one sturdy steel unit
Tank, agitator, pump, engine and pressure control all ride in a single angle-iron frame. Getting it to the job is almost as easy as driving there.
Airless
No compressor, and almost no overspray. The coating goes on where you aim it, even in tight corners.
Helical pump
A Moyno rotor-stator pump with one moving part. Smooth flow that never pulses, and it handles abrasives that would wreck a piston pump.
Full-length agitator
Neoprene-bladed paddles run the length of the tank, keeping cement in suspension and the mix even from first gallon to last.
Self-cleaning screen
The agitator's wipers sweep the outlet screen on every turn, so the line doesn't clog. That idea is the heart of the patent.
Adjustable relief
Let go of the gun and the spring-loaded relief valve sends material back to the tank. Set the pressure by watching the gauge.
Friction-clutch drive
A 5 HP Briggs & Stratton with a V-Plex clutch drives the pump and agitator, burning less than a quart of gas per tank.
See inside the machine
Reconstructed part by part from the patent, the brochures and the original shop notes. Press Run to watch coating flow to the roof, or close the gun and watch it return through the relief valve.
If it pours, Jetspray it
One roof operator and one machine apply medium-viscosity coatings. Afterwards it cleans itself with even the lightest solvents.
- Abrasive white roof coatings
- Emulsions
- Asphalt-base coatings with fine fibres
- Vinyl & acrylic coatings
- Hypalon
- Fireproofing for shingles & shakes
- Dampproofing
- Foundation waterproofing
- Hydroseeding
- Pesticides
- Rock-landscape colour coatings
- Reflective roofing
In the past 18 months, we have coated over 200 roofs using your Jetspray equipment… we have found that Jetspray applies these coatings better than any previous equipment we have used.
Our experience has proven that with Jetspray our labor savings alone exceeds 50%… Operating maintenance of the machine, including gasoline and oil, averages less than 50¢ per roof.
Testimonials as printed in an original Jetspray brochure. See the brochure.
Built to last
Jetspray was improved over the years, and the brochures show it. Both generations are listed here as printed.
| 1966–67 | Later models | |
|---|---|---|
| Engine | 4 HP Briggs & Stratton | 5 HP gasoline |
| Clutch | V-Plex friction clutch power take-off | |
| Pump | Helical rotor-stator (Moyno) | |
| Tank capacity | 130 gal | 125 gal |
| Output | up to 6–7 gpm | up to 7 gpm |
| Pressure | up to 200–250 psi | up to 1,000 psi* |
| H × L × W | 44 × 54 × 28 in | 44 × 54 × 29 in |
| Weight | 400 lb | 430 lb |
| Hose | 50 ft, ½ in, 200 lb | 150 ft, ¾ in Buna-N lined |
| Nozzles | Spray gun assembly | 4 stainless fan nozzles |
* "Up to 350 lbs. with water and up to 1,000 lbs. with heavier coatings." Later brochure. Full engineering notes →
Complete Jetspray unit, f.o.b. San Diego. That's very roughly $12,000–13,000 in today's dollars.
- 4 HP Briggs & Stratton engine
- Friction clutch power take-off
- Helical pump
- Tank unit & agitator
- Pressure relief valve assembly
- Spray gun assembly
- 50 ft hose with adapters
Guaranteed one year against defective material and workmanship, plus a 10-day money-back free trial.
The man behind the machine
Alex O. Jutila filed his patent in May 1964 from San Diego, and Jetspray Products built the machines by hand for years afterward. This site keeps his work alive with the original documents, a working 3D model and plans for a scale model you can build.
