SEM 1K HS Clear - 20oz Aerosol Can - Gloss Finish
SEM 1K HS Clear - 20oz Aerosol Can - Gloss Finish

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

$38.51
$42.36
$38.51

MPN : 40903

SKU: 109319
Availability: In stock
Product type: Automotive/RV | Accessories,Boat Outfitting | Adhesives/Sealants/Tapes
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Gloss clear finish
Single-component high-solids aerosol
For supported basecoat refinishing
SEM 1K HS Clear - 20oz Aerosol Can - Gloss Finish

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

$42.36 $38.51
SEM 1K HS Clear - 20oz Aerosol Can - Gloss Finish

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

$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 procedure before clearcoating accessories, jambs, inner panels or new-part cut-ins.

    40903 identifies the gloss version of SEM’s single-component high-solids clearcoat. Manufacturer applications include Ez Coat, Factory Pack and most automotive basecoats under the complete refinishing procedure. A clear film retains the underlying color while changing its finished appearance; verify the actual sheen on a test sample. It is not a hardener-activated two-component clear, and the listing does not establish universal fuel resistance, a numerical heat rating or suitability for every full-body/exterior repair.

    Choose preparation for the actual job. For supported previously painted/plastic blend areas, the TDS specifies a gray scuff pad or P400–P600 sanding, the appropriate cleaner and a clean tack wipe; plastic uses Plastic & Leather Prep and any promoter specified for the actual thermoplastic. For wet-on-wet/OEM refinishing, allow the basecoat to flash under its manufacturer’s instructions before clearing; do not automatically sand a fresh basecoat using the blend-area procedure. Shake well and apply 2–3 medium coats from 6–8 inches with 3–5 minutes flash between coats. The linked TDS gives 1 hour dry time for 40903; verify actual conditions and handling readiness rather than treating this as universal full cure. Excessive clear or clearing before the basecoat flashes can rewet the basecoat. Clear the spray tip as directed and follow the current label/SDS for ventilation, protective equipment, ignition control and storage.

    Clear Product Details

    Review the 16 oz gel format, specifications and application directions.

    Surface Guidance

    Check fiberglass, gelcoat and finish suitability before use.

    Product Support

    Ask about your surface and stain type before ordering.

    Shipping & Returns

    Review shipping information and return conditions before purchase.

    Application Guides

    Match the Repair Material to the Substrate and System

    Check 40903 by its actual factory-finish, sanding-guide, primer-surfacer or clearcoat role. Confirm substrate, coating compatibility, color or sheen, preparation, application and package before choosing.

    1. Identify a Clearcoat Task

      Choose a clear finish for supported small accessories, jambs, inner panels or cut-ins under the complete refinish system.

    2. Match the Underlying Coating

      Verify Ez Coat, Factory Pack or the actual basecoat and the prescribed overcoat process. Do not infer adhesion to every raw material or universal resistance to fuel and heat.

    3. Choose Gloss or Semi-Gloss

      40903 supplies gloss. 40903 is gloss and 40913 is semi-gloss; check the actual sheen with a sample. Their listed dry-time references differ.

    4. Choose Wet-on-Wet or Blend Preparation

      Allow a fresh basecoat to flash as specified. Use the separate scuff/clean/tack process only for the supported previously painted/plastic blend-area task; confirm any plastic promoter.

    5. Control Film Build and Flash

      Use 2–3 medium coats, 6–8 inches spray distance and 3–5 minutes flash. The TDS lists 1 hour dry time for 40903. Excessive application or insufficient basecoat flash can cause rewetting.

    6. Confirm Yield and Separate Supplies

      Published coverage references differ: the current product/store page lists 28.6 square feet at 1 mil dry-film thickness, while the linked TDS lists 23.4 square feet per can at 1 mil. Confirm the applicable stocked formula and current SEM guidance before planning quantity; neither figure guarantees actual repair yield. One SEM 40903 1K HS Clear aerosol in gloss finish, manufacturer-listed 20-ounce container format. Read the can for net contents. This is one can, not a six-can case. Basecoat, cleaners, abrasives, any specified promoter and other repair supplies are separate.

    Gloss or Semi-Gloss 1K HS Clear?

    SEM 40903 provides gloss 1K HS Clear; 40913 provides the separately sold semi-gloss finish. Both are clear, single-component aerosols in the listed 20-ounce container format, intended for supported refinishing tasks. Choose the sheen from the original area and a test sample.

    Use the exact finish’s current instructions: the linked TDS gives a 1-hour dry reference for gloss 40903 and 30 minutes for semi-gloss 40913. Both use 2–3 medium coats and 3–5 minutes flash between coats. These drying references are not a universal full-cure guarantee or approval for every exposure. Review the SEM 40913 1K HS Clear Semi-Gloss 20 oz Aerosol as a separately sold option.

    Continue Your Repair, Sealants & Trim Selection

    Choose by the actual repair function, substrate, profile and application instructions, then compare exact package contents.

    1. Compare Repair, Sealants & Trim

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    2. Explore Wash & Surface Care

      Review cleaning products for a separate surface-care task. Check the exact material and label; category placement does not establish adhesive-preparation compatibility.

      Browse Wash & Surface Care

    3. Explore Automotive & RV Accessories

      Return to the parent collection for another maintenance or replacement task. Check every item’s own requirements.

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    Frequently Asked Questions

    What does SKU 109319 include?
    One SEM 40903 1K HS Clear aerosol in gloss finish, manufacturer-listed 20-ounce container format. Read the can for net contents. This is one can, not a six-can case. Basecoat, cleaners, abrasives, any specified promoter and other repair supplies are separate.
    Which finish is this?
    Gloss, under exact MPN 40903; the coating color is clear.
    Is this a two-component activated clear?
    It is a single-component 1K aerosol. No separate hardener or 2K activation kit is represented.
    Which underlying coatings are listed?
    SEM names Ez Coat, Factory Pack and most automotive basecoats. Confirm the exact coating and overcoat procedure rather than assuming every paint or raw substrate is compatible.
    How should I prepare a fresh basecoat?
    Allow it to flash under its manufacturer’s instructions before clearing. The TDS’s separate P400–P600 or gray-scuff-pad preparation concerns supported previously painted/plastic blend areas, not automatic sanding of a fresh wet-on-wet basecoat.
    What coat, flash and dry references apply?
    Apply 2–3 medium coats from 6–8 inches with 3–5 minutes flash. The linked TDS gives 1 hour dry time for 40903; actual conditions and handling readiness must be checked.
    How much area will one can cover?
    Published coverage references differ: the current product/store page lists 28.6 square feet at 1 mil dry-film thickness, while the linked TDS lists 23.4 square feet per can at 1 mil. Confirm the applicable stocked formula and current SEM guidance before planning quantity; neither figure guarantees actual repair yield.
    How can I confirm the right selection?
    Contact Mariners Warehouse with SKU 109319, MPN 40903, your exact product MPN, component or substrate material, existing coating, application method, working conditions and required package size.

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