Hardline Products 3" Boat Registration Kit — Series 400 Silver Fill with Black Outline, UV-Resistant Marine Vinyl

Hardline Products Series 400 is a complete 3-inch boat registration decal kit that delivers US Coast Guard–compliant characters in silver fill with black outline, engineered for long-lasting marine performance.

Give your hull the polished, factory-fitted appearance without paying for professional installation. This Series 400 registration set contains 146 precision-cut marine vinyl decals—four full sets of A–Z and 0–9—so you can mark both port and starboard sides and keep spares. Each character is manufactured from 4-mil outdoor vinyl with a UV-gloss topcoat and Hardline’s Super-Stick adhesive to resist sun, salt, fuel, and everyday wear.

How does this kit meet legal marking requirements?

The Series 400 kit was designed around US Coast Guard and common state regulations for registration characters. Every decal measures exactly 3 inches high in a clear, high-contrast block font with a slanted style for a factory look. Using the correct height and high-visibility outline helps ensure your vessel’s registration is compliant and easy to read from a distance.

• Characters: exactly 3 inches tall, block-style with forward slant
• Visibility: silver interior with black outline for high contrast
• Compliance: engineered to meet USCG and most state rules for size and legibility

What makes the materials and adhesive durable on watercraft?

Materials and adhesive have been chosen for long-term exposure to marine conditions. The decals use 4-mil vinyl topped with a UV-gloss protectant that slows fading and resists abrasion. Hardline’s Super-Stick pressure-sensitive adhesive is formulated to form a permanent bond to common hull surfaces while tolerating fuel, salt, and moisture.

• Vinyl thickness: 4-mil outdoor-grade for tear and scratch resistance
• Topcoat: UV-gloss finish to minimize sun fade and preserve sheen
• Adhesive: pressure-sensitive formula engineered for permanent sticking on hulls

Will these decals attach to my boat’s surface types?

The kit is made to adhere reliably to a wide range of hull materials used across recreational watercraft. It bonds well to fiberglass and gel-coat, adheres to painted and raw aluminum, and works on many plastics including polyethylene kayaks. For best longevity, apply to a clean, dry, and grease-free surface at recommended temperatures.

• Compatible surfaces: fiberglass, gel-coat, painted metal, aluminum, polyethylene, SMC
• Preparation tip: clean with isopropyl alcohol, dry completely, and apply at moderate temperatures
• Application: peel-and-stick method—no special tools required

How many characters are included and how do I plan my layout?

This package includes a generous set of characters so both sides of your vessel can be marked without shortages. You get 146 total decals: four full alphabetical sets plus four numeric sets, allowing for duplicate characters and spares. Lay out your registration sequence on a flat surface before applying and measure spacing to keep lettering straight and evenly balanced along the bow.

• Count: 146 decals (4x A–Z and 4x 0–9)
• Design: silver fill with black outline and subtle gradient for a 3D look
• Installation: measure, position with tape guides, then peel and apply firmly

Who is this for? Owners of powerboats, pontoons, PWCs, kayaks, and small craft who want a compliant, professional-looking registration without custom shop costs will find this kit ideal. It’s suited to DIY boaters, rental operators, and marinas needing quick, durable re-marking. If you want a long-lasting, high-contrast registration that matches factory aesthetics and withstands marine exposure, the Hardline Products USA Series 400 kit is built to deliver.