Underline Undercoating LLC

08/27/2026

It’s all in the details!

At Underline Undercoating, we don’t just spray what you can see underneath the vehicle.

We make sure to get into the hidden areas too - behind the taillights, inside the bed panels, rocker panels, fenders and other hard-to-reach areas where moisture and salt can collect and rust can start from the inside out.

A proper undercoating is about complete coverage, not just making the bottom of the truck look coated.

We go where the rust starts.

$350 - Compact Vehicles
$400 - Mid Size & Large Vehicles
Message for Commercial Size Vehicles

Fleet Discounts
Military & First Responders Discount

810-357-3023
By Appointment Only
2498 Lapeer Rd Port Huron, Mi 48060

08/07/2026

🚗 PROTECT YOUR INVESTMENT 🛻

At Underline Undercoating, we use professional commercial-grade application equipment

Every vehicle is carefully and precisely sprayed to ensure thorough coverage.

Our Professional Fluid Film® Undercoating:

✔️ Helps stop existing rust from spreading
✔️ Protects against salt & moisture
✔️ Creeps into seams and hard-to-reach areas
✔️ Precision applied for maximum coverage
✔️ No drilling into your vehicle
✔️ No dripping
✔️ Won't crack, chip, peel, or trap moisture behind!

Current Pricing:

• Small / Compact Vehicles – $350
• Mid-Size to Large / Full-Size Vehicles – $400
• Annual Maintenance Recoat – $200
• Degrease, Wash, Frame Flush – $150

📅 Appointments available 7 days a week
⏰ By appointment only

📍 2498 Lapeer Rd., Port Huron, MI 48060
📞 810-357-3023

Call, text, or message us today to reserve your appointment before the fall rush!

05/25/2026

02/08/2026

🧇 Undercoating Waffle Giveaway 🧇

We’ve had several customers ask if we’d ever run a waffle for one of our undercoating services — so we’re giving it a shot!

Here’s how it works:
• 18 total spots available
• $20 per spot
• Once all spots are filled, we’ll host a live random drawing on Random . org
• No payment required until all spots are filled

Payment methods accepted:
PayPal • Zelle • Venmo

🎁 The winner may use the service themselves or gift it — we can also provide a Gift Certificate upon request.

Available spots:
1. Damian Stein💰
2. Mark Stevens💰
3. Platinum Transportation LLC 💰
4. Damian Stein💰
5. Andy Lankford 💰
6. Johnathon Pollard 💰
7. Rachelle Malloy💰
8. Cody Lambert 💰
9. Chad Sauve💰
10. Platinum Transportation LLC 💰
11. Jessie D. Webb Braddock 💰
12. Chad Sauve💰
13. Joe Kachman 💰
14. Rich Pohlman
15. Damian Stein💰
16. Johnathan Pollard💰
17. Joe Kachman💰
18. Mark Stevens💰

01/23/2026

🚨 NEW SERVICE ANNOUNCEMENT 🚨

Underline Undercoating is now offering a Military-Grade Oil-Based Undercoating!

This new option delivers excellent corrosion protection at a more accessible price, while we continue to offer our premium Fluid Film undercoating for maximum protection.

🛡️ UNDERCOATING OPTIONS & PRICING

✅ Fluid Film Undercoating (Premium Protection)
• Large / Full-Size: $350
• Mid-Size: $325
• Small / Compact: $300

✅ Military-Grade Oil-Based Undercoating
• $200 — Any Vehicle Size

🔧 ADD-ON SERVICES
• Wash & Frame Flush: $250
• Descaling: $150 per hour
• Re-Coats (Oil-Based or Fluid Film): $200
• Industrial applications — message for pricing

🎖️ DISCOUNTS AVAILABLE
• Military & First Responders
• Fleet Vehicles

✔ Excellent rust & corrosion protection
✔ No drilling
✔ No dripping with Fluid Film
✔ Fully licensed & insured

📅 By appointment only
📍 2498 Lapeer Rd, Port Huron, MI 48060
📞 810-357-3023
Call, Text, or Message Us Here To Book Your Spot.

Don’t wait for rust to show up.
Underline it now — keep your vehicle looking its best!

11/04/2025

1996 F150 got the works today - which included a wash, frame flush, and undercoating to protect from the upcoming winter!

10/06/2025

It was time to retire old faithful ...

Huge shout out to NHOU Protective Coatings for getting the new gun out to me ASAP!!

We are often asked to explain our pricing structure relative to the individual on marketplace who operates from a garage setup with jackstands or offers mobile vehicle spraying services. Thia is one example- Our investment in industrial equipment sets us apart from DIY equipmmet that you buy from auto parts stores..