Boat Registration Decals – Fits All Marine Vessels (Replaces Hardline Products, STIFFIE, VulgrCo)
Boat Registration Decals – Fits All Marine Vessels (Replaces Hardline Products, STIFFIE, VulgrCo) is backordered and will ship as soon as it is back in stock.
Worry-free returns
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
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.
Boat Registration Decals – Fits All Marine Vessels (Replaces Hardli...
Boat Registration Decals – Fits All Marine Vessels (Replaces Hardline Products, STIFFIE, VulgrCo) is backordered and will ship as soon as it is back in stock.
Product Details
These Boat Registration Number Decals are designed for boats, personal watercraft (PWC), and other marine vessels. Available in multiple colors including blue, black, green, white, and red, these 3-inch alphanumeric sticker sets meet US Coast Guard and state regulatory requirements when properly installed.
This kit serves as a direct replacement for Hardline Products BLBKG200/BLBKG400, STIFFIE Hardline/Shift/Whipline Series, and VulgrCo Custom Boat Registration Numbers.
- Features a simple peel-and-stick, self-adhesive installation for quick application.
- Constructed from marine-grade vinyl with a UV-resistant and waterproof coating for durability.
- Includes four complete sets of A-Z and 0-9, providing ample characters for any registration number.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number / Series |
|---|---|
| Hardline Products | BLBKG200 / BLBKG400 |
| STIFFIE | Hardline / Shift / Whipline Series |
| VulgrCo | Custom Boat Registration Numbers |
Vessel Compatibility
These registration decals are universally compatible with any vessel requiring state or federal registration numbers.
| Vessel Type | Application | Notes |
|---|---|---|
| Boats | All models requiring 3-inch registration numbers | Meets Coast Guard requirements when properly installed |
| Personal Watercraft | Jet Skis, WaveRunners, Sea-Doos | All models requiring registration |
| Yachts | All models requiring registration | |
| Pontoons | All models requiring registration | |
| Sailboats | All models requiring registration | |
| Fishing Vessels | All models requiring registration | |
| Kayaks/Canoes | Models requiring registration | Where applicable by local regulations |
Technical Specs
- Product Type
- Alphanumeric Boat Registration Decals
- Installation
- Self-adhesive peel and stick
- Housing Material
- Marine-grade vinyl with UV coating
- Housing Color
- Multiple options: Blue, Green, Red, White, Black
- Dimensions
- 3 inches (76.2 mm) high characters
- Weight
- 8.8 ounces (249 grams) per package
- Other Technical Attributes
- High-tack waterproof adhesive, UV-resistant, fade-resistant, fuel-resistant, scratch-resistant, anti-curl
What’s in the Box
- 4 x Sets of A-Z Letters (104 total letters)
- 4 x Sets of 0-9 Numbers (40 total numbers)
- 1 x Application Scraper (with some brands)
Installation Notes
- Clean the application surface thoroughly to remove any wax, grime, or oil. Ensure the area is completely dry.
- Use a strip of masking tape to create a straight guideline for aligning the bottom or top of your decals.
- Peel one character from the backing paper, being careful not to touch the adhesive surface.
- Carefully position the decal along your guideline and press it onto the hull, starting from the center and smoothing outwards.
- Use a plastic scraper or credit card to firmly press down the entire decal, removing any potential air bubbles.
- Repeat for all characters, leaving a space equal to one character width between each letter and number grouping as required by regulations.
- Allow the decals to cure for at least 24 hours before exposing the vessel to water for maximum adhesion.
Troubleshooting & FAQ
Do these decals meet US Coast Guard regulations?
Yes, when installed correctly. The characters are 3 inches high, feature a simple block font, and are designed to contrast with the hull color, meeting USCG requirements. Always verify your state's specific spacing and placement rules.
How durable are these vinyl letters in a marine environment?
These decals are made from 4 mil marine-grade vinyl with a protective UV coating. They are engineered to resist fading, fuel, and scratches for 3-5 years under normal marine conditions.
What is the best way to remove old registration stickers?
Gently heat the old decals with a hair dryer or heat gun to soften the adhesive. Use a plastic scraper to lift and peel them off. An adhesive remover can be used to clean any lingering residue before applying the new set.
Can these be applied to an inflatable boat or RIB?
While the high-tack adhesive sticks to many surfaces, its bond may not be permanent on flexible or textured materials like Hypalon or PVC. For best results on inflatables, apply the decals to a smooth, rigid registration plate affixed to the craft.
Why does the character count vary between 144 and 146 per package?
The standard kit includes 4 sets of A-Z (104 letters) and 4 sets of 0-9 (40 numbers), a total of 144 characters. Some manufacturers may include a couple of extra symbols or hyphens, leading to a total of 146.
What's the required spacing between characters?
Regulations typically require spacing equal to one character width (excluding "I" or "1"). A hyphen or a space of equivalent width must separate the state prefix and suffix letters from the numerals. For example: `PA 1234 AB`.
What’s the difference between OEM and aftermarket parts?
This listing is for an aftermarket replacement, not an original equipment manufacturer (OEM) part. It is built to meet or exceed OEM-level specifications using comparable materials. Our products are manufactured in an ISO 9002 certified facility and are batch-inspected to ensure quality and consistency.
How much is shipping and how fast will it arrive?
We ship worldwide, with most orders arriving within 5–15 days. Standard shipping is free to most regions, with expedited options available at checkout where applicable.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or contact us for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not complete the purchase.
- This is an aftermarket replacement part, not an OEM component.
- Professional installation is recommended for safety and optimal performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- Fast Global Fulfillment — We offer free standard delivery to most regions, with an average transit time of 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
