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FLASHSALE26

JLM MARINE Self-Adhesive Vinyl Letters & Numbers – Fits Boats, Mailboxes & Signs (Replaces 3-Inch Black)

Regular price $19.88

Worry-free returns

Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.


If the return is due to our error or a defective item, we’ll make it right.


Please contact us before returning any item.

Delivery and Shipping

Orders are typically processed within 1–2 business days.


U.S. orders usually arrive within 6–15 days, depending on stock location and destination.


International delivery times may vary due to customs processing.


Tracking information will be provided once your order ships.

If you have any questions, feel free to email us at info@seasierra.com, and we’ll get back to you within 20–36 hours.

Product Details

These JLM MARINE Self-Adhesive Vinyl Letters & Numbers are designed for clear, durable identification on a variety of outdoor and indoor surfaces. Each 3-inch black character is perfect for application on boats, engines, mailboxes, and signs, offering a clean, professional look. The vinyl material is weatherproof and resistant to heat and stains, ensuring longevity in marine and other demanding environments.

  • Installation: Simple peel-and-stick self-adhesive backing.
  • Environment: Suitable for both indoor and outdoor use; fully waterproof.
  • Package Contents: Includes 24 sheets containing a total of 144 letters and numbers.

Technical Specs

Product Type
Self-Adhesive Vinyl Letters and Numbers
Material
Vinyl
Color
Black
Size
3 inches (76.2 mm)
Total Pieces
144 (across 24 sheets)
Item Shape
Rectangular
Dimensions
9 × 4 × 0.03 inches (228.6 × 101.6 × 0.76 mm)
Special Features
Heat Resistant, Stain Resistant, Waterproof, Weatherproof
Primary Applications
Boats, Mailboxes, Houses, Cars, Signs, Windows, Doors, and Posters
Recommended Surfaces
Paper, Vinyl, and other smooth, clean surfaces

What’s in the Box

  • 1 × JLM MARINE Self-Adhesive Vinyl Letters and Numbers (24 Sheets, 144 Pieces Total)

Installation Notes

  1. Prepare the Surface: Thoroughly clean the application area with soap and water or an isopropyl alcohol solution to remove any dirt, wax, or oils. Ensure the surface is completely dry before proceeding.
  2. Plan Your Layout: Arrange your letters and numbers before peeling the backing. Use a tape measure and painter's tape to create a straight guideline for alignment.
  3. Peel and Position: Carefully peel each letter or number from its backing sheet, avoiding touching the adhesive side.
  4. Apply with Pressure: Position the character along your guideline and press it down firmly from the center outwards. Use a squeegee or a credit card to smooth out any air bubbles.
  5. Allow to Cure: Let the adhesive set for at least 24 hours before exposing it to heavy water contact or harsh conditions.

Troubleshooting & FAQ

What is the exact distribution of letters and numbers in the package?

The package contains a general assortment of 144 letters and numbers across 24 sheets. The exact count for each specific character is not specified by the manufacturer.

How do I ensure the letters are applied in a straight line?

For best results, use a level or a ruler to draw a faint pencil line or apply a strip of painter's tape to serve as a baseline. Align the bottom of each letter to this guide as you apply it.

Can these letters be applied to curved surfaces?

Yes, the flexible vinyl can conform to gentle curves. For best adhesion, apply steady pressure from the center of the decal outwards to prevent bubbles.

How do I remove the letters later?

Gently heat the letter with a hairdryer to soften the adhesive, then use a plastic scraper or your fingernail to peel it off. Any remaining adhesive residue can be cleaned with an appropriate solvent like rubbing alcohol or a specialized adhesive remover.

Are these suitable for boat registration numbers below the waterline?

While the vinyl is waterproof, its durability below the waterline can depend on water conditions, speed, and antifouling paint. For registration numbers, application above the waterline is recommended for maximum longevity.

What are the signs that the vinyl letters need replacement?

Look for signs of peeling edges, cracking, significant fading, or discoloration. If the letters begin to lift, it's a sign that the adhesive is failing and they should be replaced.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost

We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

Warranty & returns

Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.

Safety & Important Info

  • Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
  • This is an aftermarket replacement, not an OEM component.
  • Professional installation is recommended for safety and performance.

About Sea Sierra

  • Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
  • Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
  • Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.

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