Roof, Slide and Awning
RV Slide-Out Seal, Bulb and Wiper Gasket Replacement
Typical range
$400 to $3,000
Shop hours
2 to 14
Labor rate
$210/hr
The short answer
Slide-out seal replacement renews the bulb, wiper, and D-seals that keep water and dust out of the slide opening. Compression set from Southern California heat is the usual cause. Work runs $400 to $3,000, or 2 to 14 hours at $210 per hour plus materials.
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What this work actually involves
A slide opening is sealed by two or three different profiles working together, and owners tend to think of them as one thing. The bulb seal is the hollow compressible profile on the perimeter of the opening that the room squeezes against when it is closed. The wiper seal is the flexible blade that rides on the room face during travel and sheds water when the room is extended. Some designs add a D-seal or a corner seal at the top where the wiper cannot make a clean transition. Each has a different profile, a different mounting method, and a different failure mode.
What kills them here is heat, not wear. Inland valley storage from Corona through Riverside and Temecula puts a coach through a wide daily temperature swing for months, and the combination of heat and sustained compression takes the memory out of the rubber. The seal goes flat and stays flat. The room still closes, the seal still touches, but it no longer compresses, so the first hard rain of the season puts water on the floor along the bottom of the opening. Lubricant does not fix a seal that has taken a compression set. Nothing brings that memory back.
Mounting is where a lot of replacements fail. Seals attach either by an adhesive backing, by a barbed spline pushed into a slot in the trim, or by a retainer strip. Adhesive-backed seals will not stick to a surface that still has old adhesive residue or oxidized aluminum on it, especially in coastal Newport Beach and Oceanside units where salt has already dulled the substrate. We strip the mounting surface to clean material, cut corners rather than stretching seal around them, and set the room travel limits afterward so the seal actually compresses to spec.
Systems and brands we work on: Lippert In-Wall, Schwintek, Power Gear, BAL Accu-Slide.
Location: All work is performed at our Yorba Linda facility. We do not offer mobile, roadside, or fleet route service.
02
What the job includes
- Bulb seal replacement around the full perimeter of the slide opening
- Wiper and blade seal replacement on the exterior face of the opening
- D-seal and corner seal replacement at top transitions
- Correct profile identification and sourcing by measured cross-section
- Mounting surface stripping, cleaning, and oxidation removal before install
- Spline, barb, and retainer channel repair where the slot has been damaged
- Corner cutting and mitering rather than stretching seal around radii
- Slide travel limit and stop adjustment so the seal compresses correctly
- Floor and wall moisture check at the opening where seals have been leaking
- Full cycle test and water test at the opening before delivery
03
When you need this service
- Water on the floor along the bottom of the slide opening after rain
- A seal that stays flat and does not spring back when you press it
- Visible daylight at a corner of the opening with the room closed in
- Cracked, split, or chalky rubber that leaves black residue on your hand
- Dust or road grit accumulating inside along the slide track
- A seal that has rolled, folded, or pulled out of its retainer channel
- Noticeably more road noise or wind noise from the slide than before
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How we do it, step by step
- 01
Profile identification
Every seal on the opening is measured in cross-section and identified. Bulb, wiper, and D-seal profiles are not interchangeable, and near-fit seals do not compress correctly.
- 02
Opening and room inspection
The room is cycled and the seal witness line checked around the full perimeter. Uneven contact usually means a travel limit or squareness issue behind the seal complaint.
- 03
Moisture check at the opening
Floor, wall, and sill metered where a failed seal has been letting water in. Replacing the seal over wet substrate leaves the actual damage in place.
- 04
Removal and surface preparation
Old seal, adhesive residue, and oxidation stripped down to clean material. Adhesive-backed seal will not hold on a coastal unit whose aluminum has already dulled.
- 05
Install with cut corners
New seal fitted with corners cut and joined rather than stretched around the radius. Stretched corners pull back over the first few hot weeks and open a gap.
- 06
Travel limit adjustment
Room stops and controller travel limits set so the bulb compresses to specification all the way around, not just at the center of each run.
- 07
Cycle and water test
The room is cycled several times to seat the seal, then the opening is water tested at pressure with the room in and checked dry inside.
05
Pricing and posted rates
| Item | Rate or range | Notes |
|---|---|---|
| Typical job range | $400 to $3,000 | Varies with extent of damage and parts availability |
| Shop hours | 2 to 14 | Quoted after teardown, not before |
| Body and paint labor | $210 per hour | 2026 posted rate |
| Paint supplies | $55 per paint hour | Calculated automatically on every estimate |
| Body supplies | $5 per body hour | Calculated automatically on every estimate |
| Parts | 100% markup under $100, 35% over | Special order parts require a non refundable deposit at order |
| Deposit | 50% at authorization over $2,000 | Additional 25% when parts arrive on jobs over $10,000 |
| Sales tax | 7.75% on parts and materials | Labor is not taxed |
Insurance billed jobs may be billed at carrier negotiated labor rates that differ from the posted retail rates above. See all posted rates.
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Vehicles we do this work on
Vehicle
Class A Gas Motorhomes
A Class A gas motorhome is a flat-front coach built on a Ford F53 or Workhorse front-engine chassis, typically 28 to 38 feet. Rear
Vehicle
Class A Diesel Pusher Motorhomes
A diesel pusher carries a rear-mounted diesel on a raised-rail air ride chassis, usually 34 to 45 feet with full-body paint and pa
Vehicle
Class C Motorhomes
A Class C is a coach body built onto a cutaway van chassis with a sleeping or storage cabover extending above the factory cab. Tha
Vehicle
Standard Fifth Wheels
A fifth wheel couples to a hitch in the truck bed through a kingpin and pin box, with a raised forward bedroom over the truck. The
Vehicle
Toy Hauler Fifth Wheels
A toy hauler fifth wheel carries a cargo garage behind the axles with a full-height rear ramp door. Load behind the axle centerlin
Vehicle
Travel Trailers
A travel trailer tows from a ball hitch behind the tow vehicle rear axle on an A-frame tongue, which makes it the most sway-prone
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Questions about slide-out seal and gasket replacement
Frequently asked questions
How much does slide-out seal replacement cost?
A single opening with bulb and wiper seals replaced typically runs $400 to $1,100. A large coach with three or four slides, damaged retainer channels, and moisture correction at a sill runs toward $3,000. The published range is 2 to 14 hours at $210 per hour plus materials. Opening perimeter and number of slides drive the number.
Can I just lubricate my slide seals instead of replacing them?
Conditioner helps a seal that is still resilient by keeping the rubber flexible and reducing drag on the room face, and it is worth doing annually. It does nothing for a seal that has taken a compression set. Once the bulb stays flat under your thumb, the material has lost its memory permanently and only replacement restores the seal.
How often do slide seals need replacing in Southern California?
Coastal and basin units often run eight to ten years. Inland valley and desert units are shorter, frequently five to seven, because sustained heat under compression accelerates the set. If your coach lives in Corona, Temecula, Indio, or Palm Desert, test the seals with a hose before each rainy season instead of waiting for water on the floor.
Water comes in when it rains but the seal looks fine. What else could it be?
Several things. The room may be out of square so the seal only touches at the center of each run. The travel limits may be set short so the bulb never fully compresses. The slide topper may be dumping water into the top of the opening. Or the leak is at the roof penetration above the slide and running down inside the wall.
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More roof, slide and awning work
Ready to move on slide-out seal and gasket replacement? Bring it to Yorba Linda.