(314) 939-11303859 Lemay Ferry Rd, St. Louis, MOOpen 7 Days a Week
🕗EXTENDED HOURSTUESDAYS & THURSDAYS open until 8:00 PMCome in after work!
☀️OPEN SUNDAYS9:00 AM – 4:00 PMPerfect for weekend detailers!
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— Marine Detailing Supplies

CAP'N JAX
MARINE LINE

The Home of Real Car Care Products — St. Louis's premier source for marine detailing supplies. Purpose-built Cap'n Jax products for gelcoat, fiberglass, vinyl, and teak. From the Missouri River to Lake of the Ozarks, we have you covered.

In-Store Now — Tue & Thu Open Until 8PM
Lake of the Ozarks Ready

2.5 hours from STL. We carry everything you need before and after your Ozarks trip — salt wash, foam guns, drying towels, and full ceramic protection.

Gelcoat & Fiberglass Experts

Cap'n Jax products are engineered specifically for marine surfaces. Not automotive products repurposed for boats — purpose-built marine chemistry.

Salt & Freshwater Formulas

Whether you're on the Missouri River, Mississippi, or heading to saltwater, we have the right products to neutralize salt and protect your investment.

Restore Faded Gelcoat

Cap'n Cut + Cap'n Polish is the two-step system that brings heavily oxidized, chalky gelcoat back to life. We'll show you how.

— Cap'n Jax Collection

FULL MARINE CATALOG

BEST SELLER
Cleaners & Detailers

Cap'n Jax Marine Detailer+

The all-in-one marine quick detailer. Cleans, shines, and protects gelcoat, fiberglass, and painted surfaces in one step. Safe for all marine finishes.

From $14.95
POPULAR
Cleaners & Detailers

Cap'n Jax Interior Detailer+

All-in-one interior quick detailer for boats. Cleans, conditions, and protects vinyl, plastic, and fabric surfaces. UV protection included.

From $13.95
Cleaners & Detailers

Cap'n Jax Interior Cleaner

Heavy-duty interior cleaner for marine vinyl, upholstery, and hard surfaces. Removes mildew stains, dirt, and grime without damaging surfaces.

From $12.95
SALTWATER ESSENTIAL
Cleaners & Detailers

Salt Wash

Specially formulated to neutralize and remove salt deposits from marine surfaces. Essential for saltwater boaters. Prevents corrosion and oxidation.

From $19.95
Cleaners & Detailers

Boat Wipe

Convenient spray-on, wipe-off boat cleaner. Perfect for quick cleanups at the dock or on the water. Removes light dirt, water spots, and spray.

From $12.95
PRO PICK
Polish & Compound

Cap'n Polish

Marine-grade polish for gelcoat and fiberglass. Removes light oxidation, water spots, and surface scratches. Restores gloss and color depth.

From $28.95
HEAVY OXIDATION
Polish & Compound

Cap'n Cut

Heavy-cut compound for severely oxidized gelcoat and fiberglass. Removes deep oxidation, chalky surfaces, and heavy staining. Use before Cap'n Polish.

From $32.95
PROFESSIONAL GRADE
Coatings & Protection

Marine Coating

Professional-grade ceramic coating for boats. Bonds permanently to gelcoat and fiberglass for years of protection. Extreme gloss, UV resistance, and hydrophobic properties.

From $235.00
TOOL
Tools & Accessories

Cap'n Jax Foam Gun

Marine-grade foam gun for boats and watercraft. Attaches to standard garden hose. Generates thick foam for a safe, scratch-free wash.

$69.95
Tools & Accessories

Cap'n Mitt

Chenille microfiber wash mitt designed for marine surfaces. Extra-soft fibers safe on gelcoat and painted surfaces. Deep-pile for maximum dirt capture.

$7.50
MUST HAVE
Tools & Accessories

Cap'n Mitt on a Stick

Extended-reach wash mitt on a telescoping pole. Reach every part of your hull, deck, and cabin without stretching or climbing. Essential for larger vessels.

$89.95
Tools & Accessories

Cap'n Jax Bucket w/ Gamma Seal Lid

5-gallon detailing bucket with airtight Gamma Seal lid. Perfect for the dock or storage. Keeps products fresh and prevents spills.

$19.95
LOW STOCK
Towels & Microfibers

Cap'n Jax Drying Towel (30x36)

Extra-large marine drying towel. 30x36 inch ultra-absorbent microfiber. Dries your entire boat hull in one pass without scratching.

$35.00
Towels & Microfibers

Marine Edgeless Towel

Premium edgeless microfiber towel for marine use. Safe on all gelcoat and painted surfaces. Ideal for applying detailers, waxes, and coatings.

From $8.75
Towels & Microfibers

Marine Utility Towel

Affordable utility microfiber towel for general marine cleaning tasks. Absorbent, durable, and safe on all surfaces.

From $1.95
— Pro Tip

RESTORE OXIDIZED GELCOAT
IN TWO STEPS

Chalky, faded gelcoat is one of the most common marine problems — and one of the most fixable. Our staff can walk you through the exact process in-store.

01
Cap'n Cut

Heavy-cut compound that removes deep oxidation, chalky surfaces, and heavy staining. Restores the underlying gelcoat.

From $32.95
02
Cap'n Polish

Marine-grade polish that removes light oxidation and restores gloss. Follow with Marine Coating for long-term protection.

From $28.95
ASK OUR STAFF: (314) 939-1130
— Also In-Store
ATV / SxS / POWERSPORTS DETAILING

We also carry products for ATVs, side-by-sides, UTVs, and dirt bikes. Ceramic coatings, mud repellents, plastic restorers, and more.

VIEW POWERSPORTS