RV repair and automotive refinishing supplies, including SEM primers, adhesion promoter, clearcoat, TACO Marine sealants, sanding discs, and repair tools beside a motorhome at a scenic campsite.

AUTOMOTIVE & RV REPAIR ESSENTIALS

Repair, Refinish & Maintain with Confidence

Shop automotive and RV repair supplies for surface preparation, refinishing, sealing and trim-related maintenance. Compare primers, adhesion promoters, coatings and specialty repair products, then verify the application, material and exact product specifications before ordering.

Automotive & RV Repair, Sealants & Trim

Explore automotive and RV repair supplies designed to support surface preparation, refinishing, sealing, and trim-related maintenance. From primers, adhesion promoters, and coatings to specialty sealants and repair products, this collection helps you find supplies for a range of automotive and recreational vehicle projects.

Choose products based on the surface material, repair requirements, and intended application. Before ordering, review each product’s description, application instructions, and specifications to confirm compatibility with your project and achieve a reliable, professional-quality finish.

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  • SEM Trim Black - 20oz Aerosol Can

    SEM Trim Black - 20oz Aerosol Can MPN - 39143 SKU: 109324
    MPN: 39143

    $26.00
    $28.60
    $26.00
    Trim Black - 20oz Aerosol CanTrim Black is an acrylic coating formulated to match the OEM finish on automotive trim components. For use on plastic, aluminum, steel, stainless steel, and chrome. Features: Excellent adhesion and durability No primer required Matches OEM appearance Retains flexibility...
    $26.00
    $28.60
    $26.00
  • SEM Plastic Adhesion Promoter - 16oz Aerosol Can

    SEM Plastic Adhesion Promoter - 16oz Aerosol Can MPN - 39863 SKU: 109322
    MPN: 39863

    $45.46
    $50.01
    $45.46
    SEM 39863 Plastic Adhesion Promoter Aerosol, MPN 39863 and Mariners Warehouse SKU 109322, supplies adhesion treatment before compatible topcoating of suitable raw olefin plastics. Improve topcoat adhesion on documented suitable raw olefin-based plastics with clear SEM 39863. Confirm the plastic, coating system, stocked package...
    $45.46
    $50.01
    $45.46
  • SEM 1K HS Clear - 20oz Aerosol Can - Matte Finish

    SEM 1K HS Clear - 20oz Aerosol Can - Matte Finish MPN - 40923 SKU: 109321
    MPN: 40923

    $38.51
    $42.36
    $38.51
    SEM 40923 1K HS Clear Matte 20 oz Aerosol, MPN 40923 and Mariners Warehouse SKU 109321, supplies single-component clear finishing for supported small refinishing jobs. Finish a supported small refinishing job with matte 1K HS Clear. Match the desired sheen, basecoat compatibility and flash...
    $38.51
    $42.36
    $38.51
  • SEM 1K HS Clear - 20oz Aerosol Can - Semi-Gloss Finish

    SEM 1K HS Clear - 20oz Aerosol Can - Semi-Gloss Finish MPN - 40913 SKU: 109320
    MPN: 40913

    $38.51
    $42.36
    $38.51
    SEM 40913 1K HS Clear Semi-Gloss 20 oz Aerosol, MPN 40913 and Mariners Warehouse SKU 109320, supplies single-component clear finishing for supported small refinishing jobs. Finish a supported small refinishing job with semi-gloss 1K HS Clear. Match the desired sheen, basecoat compatibility and flash...
    $38.51
    $42.36
    $38.51
  • SEM 1K HS Clear - 20oz Aerosol Can - Gloss Finish

    SEM 1K HS Clear - 20oz Aerosol Can - Gloss Finish MPN - 40903 SKU: 109319
    MPN: 40903

    $38.51
    $42.36
    $38.51
    SEM 40903 1K HS Clear Gloss 20 oz Aerosol, MPN 40903 and Mariners Warehouse SKU 109319, supplies single-component clear finishing for supported small refinishing jobs. Finish a supported small refinishing job with gloss 1K HS Clear. Match the desired sheen, basecoat compatibility and flash...
    $38.51
    $42.36
    $38.51
  • SEM High-Build Primer Surfacer - 20oz Aerosol Can - White

    SEM High-Build Primer Surfacer - 20oz Aerosol Can - White MPN - 42043 SKU: 109318
    MPN: 42043

    $36.31
    $39.94
    $36.31
    SEM 42043 High-Build Primer Surfacer White 20 oz Aerosol, MPN 42043 and Mariners Warehouse SKU 109318, supplies sandable flexible acrylic priming and surfacing. Build a sandable white primer layer on documented suitable metal, plastic or composite surfaces. Match the material-specific cleaning and adhesion-promoter requirements...
    $36.31
    $39.94
    $36.31
  • SEM High-Build Primer Surfacer - 20oz Aerosol Can - Rose
    Out Of Stock

    SEM High-Build Primer Surfacer - 20oz Aerosol Can - Rose MPN - 42033 SKU: 109316
    MPN: 42033

    $32.00
    $35.20
    $32.00
    SEM 42033 High-Build Primer Surfacer Rose 20 oz Aerosol, MPN 42033 and Mariners Warehouse SKU 109316, supplies sandable flexible acrylic priming and surfacing. Build a sandable rose primer layer on documented suitable metal, plastic or composite surfaces. Match the material-specific cleaning and adhesion-promoter requirements...
    $32.00
    $35.20
    $32.00
    Out Of Stock
  • SEM High-Build Primer Surfacer - 20oz Aerosol Can - Beige
    Out Of Stock

    SEM High-Build Primer Surfacer - 20oz Aerosol Can - Beige MPN - 42023 SKU: 109315
    MPN: 42023

    $36.31
    $39.94
    $36.31
    SEM 42023 High-Build Primer Surfacer Beige 20 oz Aerosol, MPN 42023 and Mariners Warehouse SKU 109315, supplies sandable flexible acrylic priming and surfacing. Build a sandable beige primer layer on documented suitable metal, plastic or composite surfaces. Match the material-specific cleaning and adhesion-promoter requirements...
    $36.31
    $39.94
    $36.31
    Out Of Stock
  • SEM High-Build Primer Surfacer - 20oz Aerosol Can - Grey

    SEM High-Build Primer Surfacer - 20oz Aerosol Can - Grey MPN - 42013 SKU: 109314
    MPN: 42013

    $36.31
    $39.94
    $36.31
    SEM 42013 High-Build Primer Surfacer Gray 20 oz Aerosol, MPN 42013 and Mariners Warehouse SKU 109314, supplies sandable flexible acrylic priming and surfacing. Build a sandable gray primer layer on documented suitable metal, plastic or composite surfaces. Match the material-specific cleaning and adhesion-promoter requirements...
    $36.31
    $39.94
    $36.31
  • SEM High-Build Primer Surfacer - 20oz Aerosol Can - Black

    SEM High-Build Primer Surfacer - 20oz Aerosol Can - Black MPN - 42003 SKU: 109313
    MPN: 42003

    $36.31
    $39.94
    $36.31
    SEM 42003 High-Build Primer Surfacer Black 20 oz Aerosol, MPN 42003 and Mariners Warehouse SKU 109313, supplies sandable flexible acrylic priming and surfacing. Build a sandable black primer layer on documented suitable metal, plastic or composite surfaces. Match the material-specific cleaning and adhesion-promoter requirements...
    $36.31
    $39.94
    $36.31
  • SEM Guide Coat - 16oz Aerosol Can - Black

    SEM Guide Coat - 16oz Aerosol Can - Black MPN - 38203 SKU: 109311
    MPN: 38203

    $15.08
    $16.59
    $15.08
    SEM 38203 Guide Coat Black 16 oz Aerosol, MPN 38203 and Mariners Warehouse SKU 109311, supplies visual sanding guide for defects in a primed repair. Find low spots, sanding scratches and minor imperfections while sanding a suitable primed repair. Apply the black Guide Coat...
    $15.08
    $16.59
    $15.08
  • SEM Ez Coat™ - 16oz Aerosol Can - Dark Green
    Out Of Stock

    SEM Ez Coat™ - 16oz Aerosol Can - Dark Green MPN - 62293 SKU: 109310
    MPN: 62293

    $30.60
    $33.66
    $30.60
    SEM 62293 Ez Coat Dark Green 16 oz Aerosol, MPN 62293 and Mariners Warehouse SKU 109310, supplies direct-to-metal coating for matching factory primer and e-coat appearance. Restore a documented suitable factory primer or e-coat appearance with dark green Ez Coat. Apply to properly prepared...
    $30.60
    $33.66
    $30.60
    Out Of Stock
  • SEM Ez Coat™ - 16oz Aerosol Can - Field Drab
    Out Of Stock

    SEM Ez Coat™ - 16oz Aerosol Can - Field Drab MPN - 62283 SKU: 109309
    MPN: 62283

    $30.60
    $33.66
    $30.60
    SEM 62283 Ez Coat Field Drab 16 oz Aerosol, MPN 62283 and Mariners Warehouse SKU 109309, supplies direct-to-metal coating for matching factory primer and e-coat appearance. Restore a documented suitable factory primer or e-coat appearance with field drab Ez Coat. Apply to properly prepared...
    $30.60
    $33.66
    $30.60
    Out Of Stock
  • SEM Ez Coat™ - 16oz Aerosol Can - White

    SEM Ez Coat™ - 16oz Aerosol Can - White MPN - 62273 SKU: 109308
    MPN: 62273

    $30.60
    $33.66
    $30.60
    SEM 62273 Ez Coat White 16 oz Aerosol, MPN 62273 and Mariners Warehouse SKU 109308, supplies direct-to-metal coating for matching factory primer and e-coat appearance. Restore a documented suitable factory primer or e-coat appearance with white Ez Coat. Apply to properly prepared steel, aluminum,...
    $30.60
    $33.66
    $30.60
  • SEM Ez Coat™ - 16oz Aerosol Can - Olive Brown
    Out Of Stock

    SEM Ez Coat™ - 16oz Aerosol Can - Olive Brown MPN - 62263 SKU: 109307
    MPN: 62263

    $30.60
    $33.66
    $30.60
    SEM 62263 Ez Coat Olive Brown 16 oz Aerosol, MPN 62263 and Mariners Warehouse SKU 109307, supplies direct-to-metal coating for matching factory primer and e-coat appearance. Restore a documented suitable factory primer or e-coat appearance with olive brown Ez Coat. Apply to properly prepared...
    $30.60
    $33.66
    $30.60
    Out Of Stock

Check Product Compatibility


Match the product to your surface, finish, tool or equipment before ordering.

Review Product Details


Check the size, quantity and included items to choose the right option for your task.

Follow Product Directions


Review manufacturer instructions for preparation, application and any use restrictions.

Product Selection Support


Need help choosing? Contact our team with your task and the product you are considering.

Find the Right Automotive & RV Repair Products

Start with the repair task, material and application type to narrow your choices before comparing individual automotive repair products, RV sealants and trim supplies.

  1. Surface Preparation & Priming

    Prepare automotive panels and repair surfaces with application-specific primers, plastic adhesion promoters and preparation products. Match the formula to the substrate and finishing system.

  2. Automotive Refinishing

    Compare automotive clearcoats, coatings and refinishing products by finish type, material requirements and recommended application method.

  3. Sealants & Repair Applications

    Choose RV repair sealants by joint location, movement, substrate and manufacturer-approved usage. Different sealing materials serve different repair purposes.

  4. Trim & Component Fitment

    Check trim dimensions, material, installation method and component compatibility before choosing an automotive or RV trim repair product.

Check Surface, Sealant & Trim Compatibility Before Ordering

SEM refinishing products, including 1K HS Clear, Plastic Adhesion Promoter, and High-Build Primer Surfacer, alongside sealant tubes, rubber trim profiles, and automotive surface samples.

Automotive and RV repair products are not universally interchangeable. Before selecting an adhesion promoter, primer, clearcoat, repair sealant or trim component, identify the exact material, existing coating and intended repair area.

Check the manufacturer's approved applications, surface preparation requirements and installation instructions. For trim components, confirm measurements, profile and attachment method. For sealants, verify the joint orientation, substrate and movement requirements.

How to Choose the Right Automotive & RV Repair Supplies

The right automotive repair product depends on the material, existing surface condition, application area and required finishing process. Follow these five checks before selecting primers, sealants, coatings or RV trim repair supplies.

  1. Identify the Repair Task

    First determine whether the job involves surface preparation, priming, refinishing, sealing or trim replacement. An adhesion promoter, high-build primer, clearcoat and exterior sealant perform different functions and should be selected according to the manufacturer's intended application.

  2. Confirm the Material & Finish

    Identify whether the surface is plastic, fiberglass, aluminum, steel, painted metal or another material. Review approved substrates, existing-coating restrictions and preparation instructions. Do not assume an automotive repair product is suitable for every RV roof, exterior panel or trim surface.

  3. Choose the Right Repair Formula

    Compare primers, adhesion promoters, clearcoats and specialty sealants according to their intended application. For RV sealants, verify whether the product is designed for horizontal joints, vertical seams or concealed bedding. For refinishing, match the coating system and required surface finish.

  4. Review Application Requirements

    Check cleaning, sanding, priming, application equipment, ventilation, safety precautions and curing instructions. Automotive refinishing and RV sealing products require different preparation methods. Follow the exact manufacturer's technical instructions rather than applying one process to every repair material.

Prepare, Repair & Protect Your Automotive or RV Surface

Successful automotive refinishing and RV repairs begin with correct surface preparation and manufacturer-approved repair materials. Follow this three-stage approach to understand when preparation products, repair compounds, sealants and finishing coatings may be required.

  1. Clean & Prepare the Surface

    Inspect the repair area and remove surface contamination using the preparation method specified for the material. Depending on the application, automotive surface preparation may involve cleaning, sanding, masking or applying a compatible adhesion promoter or primer before refinishing.

  2. Treat & Repair the Problem

    Choose the appropriate automotive repair product, primer, refinishing coating or RV sealant for the specific task. Follow the manufacturer's instructions for application thickness, temperature, working conditions and curing. Check that each product is approved for the intended substrate and repair location.

  3. Finish, Protect & Inspect

    Complete the specified finishing process and inspect the repaired surface after the required curing period. For automotive refinishing, use compatible coatings and clearcoats. For RV seams and exterior trim, follow the recommended installation, sealing and inspection procedures.

Single Repair Products, Replacement Components & Bulk Packs

Automotive and RV repair supplies featuring SEM refinishing products, Forespar and TACO Marine sealants, sanding discs, rubber trim, replacement fasteners, and bulk product packs arranged in a professional workshop.

Automotive and RV repair supplies are available in different product formats depending on the manufacturer and listing. Compare individual refinishing products, replacement components, kits and multipacks where available to select the correct quantity and package for your project.

Compare Automotive & RV Repair Product Types

Compare automotive refinishing products, primers, adhesion promoters, RV repair sealants and trim components by their intended use. Check surface compatibility, application requirements and exact product specifications before ordering.

Product Type Primary Use & Selection Guidance
Plastic Adhesion Promoter Promotes adhesion on specified plastic substrates before compatible refinishing products are applied. Check plastic type, preparation requirements and topcoat compatibility.
High-Build Primer Surfacer Used in compatible automotive refinishing systems for surface preparation and filling minor sanding imperfections. Verify approved substrates, sanding instructions and topcoat requirements.
Automotive Clearcoat Provides a specified finish over an approved coating system. Compare gloss, semi-gloss and matte finishes, along with application and curing requirements.
Guide Coat Helps reveal low spots and sanding imperfections during applicable surface preparation work. It is not a substitute for primer, basecoat or final paint.
Self-Leveling RV Sealant A flowing sealant type commonly intended for compatible horizontal roof joints and penetrations. Confirm roof membrane compatibility and manufacturer-approved application.
Non-Sag Repair Sealant A sealant type formulated to retain its shape on approved vertical or sloped joints. Check substrate compatibility, movement requirements and curing instructions.
Butyl Sealing Tape Used for specified component bedding and joint-sealing applications. Verify whether the product is approved for concealed bedding or exposed use.
Trim & Molding Components Used for component-specific finishing, protection or replacement. Confirm profile, dimensions, attachment method and vehicle or assembly compatibility.

What Our Customers Says

Excellent watertight seal for RV roof seams and trim

Used the sealant and trim repair products from this collection to re-seal our RV roof vents and side molding. The sealant applies smoothly, adheres tightly to fiberglass and aluminum, and cures to a flexible, watertight barrier.
David Miller Verified buyer
August 2026

Durable flexible bond that withstands weather and UV

Replaced worn-out exterior window trim and sealant seams on our camper. The materials remain pliable and crack-free even after continuous exposure to harsh sun and rain over several months.
Christopher Evans Verified buyer
July 2026

Clean finish and easy application process

The repair sealants and molding trim were easy to work with. Cleaned up neatly during application and produced a clean, factory-like finish along the edges with no sagging or weeping.
Mark Thompson Verified buyer
June 2026

Essential repair supplies for water leak prevention

Tackled several minor leaks around the body seams using these sealants. The adhesion strength is impressive, creating a tough protective layer that handles body flexing and road vibration without peeling.
Brian Reynolds Verified buyer
May 2026

Well-packaged items and accurate fitment dimensions

The repair trim and sealant cartridges arrived quickly and undamaged. Dimensional specifications listed on the page were exact, making it easy to match existing channels on our RV.
Steven Vance Verified buyer
April 2026

Helpful Guides

Explore guides and tips related to this collection.

SEM plastic adhesion promoter, gray high-build primer surfacer and gloss clearcoat cans beside a prepared automotive panel

How to Choose Automotive Primers, Adhesion Promoters & Clearcoats

AUTOMOTIVE REFINISHING BUYING GUIDE Choose the right product for each stage of the finish Adhesion promoters, primer surfacers and clearcoats...

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SEM seam sealer cartridge and a separate roll of black foam hatch tape on an RV maintenance workbench

RV Sealant Types Explained: Self-Leveling, Non-Sag & Butyl Tape

RV SEALANT SELECTION GUIDE Match the sealing material to the joint and the surface Self-leveling sealant, non-sag sealant and butyl...

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How to Check RV Exterior Trim & Molding Compatibility

RV TRIM COMPATIBILITY GUIDE Match the profile before choosing the color Replacement trim needs the correct opening, cross-section, retention method...

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Frequently Asked Questions

What automotive and RV repair supplies should I choose?

Choose automotive and RV repair supplies according to the specific repair task and material. Surface preparation products, primers, clearcoats, sealants and trim components serve different purposes. Start by identifying the damaged area and checking the manufacturer's intended application before selecting a product.

What is the difference between a plastic adhesion promoter and a primer?

A plastic adhesion promoter is formulated to improve coating adhesion on specified plastic surfaces, while a primer may prepare, fill or condition a surface for subsequent coatings. Their roles depend on the refinishing system. Always follow the manufacturer's technical instructions and verify product compatibility.

When should I use a high-build primer surfacer?

A high-build primer surfacer is used in compatible automotive refinishing processes to help address minor surface imperfections before finishing. Verify that the primer is approved for the substrate and that its sanding and topcoating requirements match your project.

What is the difference between gloss, semi-gloss and matte clearcoat?

Gloss, semi-gloss and matte automotive clearcoats produce different levels of surface sheen. Choose the finish that matches your intended appearance and compatible refinishing system. Confirm the manufacturer's specifications and application instructions before purchasing.

Can automotive refinishing products be used on RV fiberglass or plastic trim?

Automotive refinishing products may be suitable for RV fiberglass or plastic trim only when the exact product is approved for that substrate and application. General automotive compatibility does not automatically establish suitability for RV roof membranes, fiberglass panels, plastic trim or existing coatings.

What is the difference between self-leveling and non-sag RV sealants?

Self-leveling RV sealants are designed to flow across approved horizontal joints, while non-sag sealants are formulated to retain their shape on compatible vertical or sloped surfaces. Always check roof material compatibility, joint requirements and manufacturer instructions before use.

Is butyl tape the same as RV roof repair tape?

No. Butyl bedding tape and exposed roof seam-repair tapes can have different constructions and intended applications. Butyl tape is commonly used for specified component-bedding applications, while some repair tapes are designed for exposed seams. Verify the product's intended application before ordering.

How do I check RV exterior trim and molding compatibility?

Compare the existing trim profile, dimensions, mounting system, material and manufacturer part number with the replacement product. Confirm whether the component requires additional fasteners, sealants or installation accessories. Check the exact product listing before purchasing.

Do automotive aerosol coatings require surface preparation?

Yes. Automotive aerosol coatings generally require preparation appropriate to the coating and substrate. Review the manufacturer's instructions for cleaning, sanding, priming, masking, application conditions, ventilation and curing before use.

How can I avoid ordering the wrong automotive or RV repair product?

Confirm the repair task, surface material, manufacturer part number, package size, finish and technical instructions before ordering. For sealants, check joint location and substrate compatibility. For trim products, verify dimensions and installation requirements. Contact product support if compatibility remains uncertain.

Need Help?

 Find the Right Product Information Before You Order 

Not sure which automotive primer, plastic adhesion promoter, clearcoat, RV repair sealant or trim component fits your project? Share the repair area, surface material, product details and manufacturer part number with the Mariners Warehouse team.

Get assistance comparing available automotive and RV repair supplies and identifying the product specifications you should verify before ordering.

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