A spray-in liner is applied in five stages: empty and inspect the bed, sand and clean the factory paint, mask everything that should not be coated, prime, then spray pure polyurea hot at high pressure. Prep is what decides whether a liner lasts. A rushed sanding or a dirty surface is the usual reason a liner lifts at the edges.
Why prep matters more than the spray
People picture the spray gun when they think about a bed liner, but the spraying is the quick part. A liner holds on because of what is underneath it. If the surface is glossy, dusty, greasy or damp, the polyurea can look perfect on day one and start lifting at the edges a year later. Most of the time a truck spends in our bay goes into getting the surface right before any liner goes on.
The five steps
1. Inspect and empty the bed
When you drop the truck off, we look the bed over with you and take photos. We note scratches, dents and any rust. Tie-down hardware, bed rail caps and anything else bolted in that should not be coated come out and get set aside. If something looks like it needs repair before lining, we tell you then, not after.
2. Sand and clean
Polyurea will not bond properly to smooth, glossy paint. So the whole surface that is getting coated is sanded to dull the factory paint and give the primer something to grip. Any spots with surface rust get sanded back and treated. Then the bed is blown out and cleaned so there is no dust, grease or wax left behind. This is slow, unglamorous work, and it is where a cheap job usually cuts time.
3. Mask
Everything that should stay uncoated gets covered: the cab, the tail lights, the bumper, the hitch area, the tailgate latches and the bolt holes. The edges along the top of the bed are masked to a clean line so the finished liner looks deliberate rather than oversprayed.
4. Prime
A primer goes on over the sanded paint. It is the layer that ties the liner to the truck. Skipping primer, or spraying over it at the wrong time, is one of the common reasons a liner peels.
5. Spray the polyurea
We spray pure aromatic polyurea, a two-part material that is heated and mixed at the gun and sprayed at high pressure. It starts to set within seconds, so it builds up in passes. Our standard thickness is 2.5 mm on the floor and tailgate, where the wear is, and about 2 mm on the walls. The surface comes out textured so cargo and boots grip.
If you chose the UV finish, an aliphatic topcoat goes on the same day. Colour beds get a tinted topcoat on the second day and go home on the third.
After that, the masking comes off, hardware goes back in, and you get the keys. Light use right away, full loads after 24 hours.
Signs of a rushed job
- Edges that lift or can be picked at with a fingernail.
- Overspray on the cab, lights or bumper.
- Thin spots where you can see paint colour through the liner.
- Bubbles or blisters, often from spraying over moisture or contamination.
- Bolt holes coated shut or hardware left out.
If a shop cannot tell you how they prep the bed and how thick they spray, that is worth noting. Our list of questions to ask before you pick a bed liner shop covers this in more detail.
Quick answers
Do you take the bed down to bare metal?
No. We sand the factory paint and prime over it. Spots where the paint is already gone or rusty are cleaned up and treated before primer.
How long does the whole thing take?
Standard and UV beds are done the same day. Colour beds take three days. Prices for every option are on the Pricing page.