Spray Rig Insurance: What's Actually Covered and What Falls Through the Cracks

Your spray rig is your business. A proportioner system and truck setup for spray foam can represent $60,000 to $150,000+ in equipment. A polyurea spray rig isn't far behind. When something goes wrong — an accident, a theft, a fire — you need the right coverage in place.

The problem is that insuring a spray rig correctly requires three different coverage types that work together. Most spray contractors have one or two of them — and discover the gap when a claim is filed.

The Three Coverage Layers for Spray Rigs

1. Commercial Auto — The Vehicle

Commercial auto covers your spray rig as a vehicle. This means:

• Liability — if you're at fault in an accident and injure someone or damage property
• Collision — damage to your rig from a collision
• Comprehensive — theft, fire, vandalism, weather damage

Commercial auto covers the truck, the van, the trailer tow vehicle. It does NOT cover the equipment inside or mounted to the vehicle.

This is the gap that gets spray contractors in trouble. The proportioner system bolted to your truck bed, the heated hose assemblies, the spray guns — none of that is covered by commercial auto.

2. Inland Marine (Tools & Equipment) — The Equipment

Inland marine coverage (also called a contractor's equipment policy or tools & equipment floater) covers your portable business equipment wherever it is — on the job site, in your rig, in transit, at your shop.

This is what covers:

• Proportioners and plural component spray systems
• Heated hose assemblies and spray guns
• Compressors and generators
• Application equipment and accessories

A spray foam proportioner alone can cost $20,000 to $80,000. If your rig is stolen — vehicle and all — your commercial auto pays for the truck. Your inland marine pays for the proportioner and equipment inside it.

Without inland marine, you've lost your most valuable business asset with no insurance payout.

3. General Liability — Third-Party Claims

Commercial auto and inland marine protect your equipment. GL protects you against third-party claims arising from your work — property damage to adjacent structures, bodily injury to job site visitors, completed operations failures.

These three work together. An accident at a job site might involve all three policies: auto liability if you hit something with the rig while maneuvering, GL if the spray operation damages adjacent property, and inland marine if equipment is damaged in the incident.

Common Coverage Gaps

Gap 1: No inland marine. The most common. Spray contractors have commercial auto but no tools & equipment policy. Equipment in the rig is uninsured against theft and damage.

Gap 2: Personal auto on a commercial vehicle. Some spray contractors try to run their spray rig on a personal auto policy. Personal auto excludes business use — any claim during commercial operations will be denied. Every spray contractor using a vehicle for business needs commercial auto.

Gap 3: Under-insured equipment. Even with inland marine, the blanket limit on the policy may not cover the full value of a high-end proportioner system. Scheduling high-value items with agreed values ensures replacement cost, not depreciated value.

Gap 4: No hired and non-owned auto. If employees use their personal vehicles for your business — picking up materials, running to a job site — you need hired and non-owned auto coverage. Without it, if an employee has an accident in their personal car on company business, you may be liable without coverage.

What Happens When a Spray Rig is Stolen

Here's how the coverage should respond if your fully equipped spray rig is stolen:

1. Commercial auto pays for the vehicle (truck or van) — less your deductible, up to the ACV or agreed value
2. Inland marine pays for the proportioner and all equipment inside — less your deductible, at replacement cost if your policy is written correctly
3. Together, you can replace the rig without catastrophic financial loss

Without inland marine, you get the vehicle value from commercial auto — and you're on your own to replace $40,000+ in spray equipment.

Insuring Proportioners Correctly

Proportioners and plural component systems are the most valuable single pieces of equipment most spray contractors own. Here's how to insure them correctly:

• Schedule them specifically on your inland marine policy with agreed values
• Use replacement cost, not actual cash value — depreciation can significantly undervalue a 3-year-old proportioner that still has years of productive life
• Include accessories — heated hoses, guns, transfer pumps, and other equipment that travels with the proportioner
• Check the theft protection requirement — many inland marine policies require a locked enclosure for theft coverage to apply

The Bottom Line

Spray rig insurance isn't one policy — it's three working together. Commercial auto for the vehicle. Inland marine for the equipment. GL for third-party claims. Make sure all three are in place and sized correctly for what your rig is actually worth.

If you've been running your spray operation with just commercial auto and GL, call your agent and get an inland marine quote. It's one of the easiest gaps to close.