On November 6, 2025, we launched The GlueTread Garage, a video series built around the kinds of questions we hear from customers every day.
In the second episode, we tackled another one we hear all the time:
How do you repair tire sidewall damage on raised lettering or uneven surfaces?
If the damage runs through raised lettering or lugs, it is not as simple as sanding and applying a patch. So we decided to show exactly how we handle it.
Quick Answer
Yes, you can repair tire sidewall damage on raised lettering or uneven surfaces. The key is proper surface prep. Using a sanding flap disc with a drill allows you to level the surface quickly so a GlueTread patch can bond effectively.
Why This Is a Challenge
GlueTread patches rely on a clean, properly prepped surface to bond to the tire.
When damage runs through raised lettering or uneven areas, that surface is not flat. You can sand it down by hand, but it takes time and a bit of effort to get it where you want it.
The challenge is not the damage itself. It is getting the surface ready for the repair.
What We Tested
In this GlueTread Garage episode, Brian walks through a real example of sidewall damage that runs through raised portions of the tire.
Instead of relying only on the sandpaper included in the kit, he uses a sanding flap disc attached to a drill to prep the surface.
The goal is simple: knock down the high spots and create a smooth, even area where the patch can bond.
Why a Flap Disc Makes a Difference
After talking with customers at trade shows and out on the trail, one thing became clear. A lot of you already carry drills and other tools for working on your rigs.
So we wanted to make use of that.
A sanding flap disc:
- Quickly knocks down raised lettering and uneven sections
- Creates a smoother, more consistent surface
- Saves time and effort compared to sanding by hand
It takes something that would normally take a long time and makes it much more manageable.
Without vs. With the Right Tool
Without a flap disc:
- Sanding raised areas takes time
- Hard to get a flat surface
- More effort for less consistent results
With a flap disc:
- Quickly levels uneven surfaces
- Helps create a better bonding area
- Uses tools many off-roaders already carry
Finish Work Matters Too
Brian also demonstrates how the flap disc can be used after applying a patch.
Once the patch is in place, lightly beveling the edges helps smooth it out so it is less likely to catch on rocks or debris on the trail.
It is a small step that can make a big difference in how the repair holds up.
Important: Do Not Overdo It
There is a limit.
The flap disc is designed to be effective without being overly aggressive, but technique still matters.
If the tire starts to smoke, you have gone too far. This means the rubber has overheated, which can affect how well a patch bonds if you try to repair it right away.
To avoid this, periodically check the tire as you work. If it starts to feel warm or hot, take a break and let it cool down before continuing.
Take your time and let the tool do the work.
If You Do Overdo It
If the tire does overheat, all is not necessarily lost.
In many cases, you can let the tire cool down, re-prep the surface, and apply a new patch.
Watch Brian walk through that process here.
Using the GlueTread Tire Prep Kit
This approach led to the creation of the GlueTread Tire Prep Kit, inspired by feedback from you.
To make this process easier, we put together a kit that includes:
- Sanding flap wheel (drill required)
- Tire prep marker
- Razor knife
It is designed to help you mark clearly, cut precisely, and sand efficiently when preparing a sidewall for repair.
The razor knife is especially useful when damage runs close to a lug. In some cases, trimming or cutting back part of the lug can help create a better surface before sanding.
Check out the GlueTread Tire Prep Kit.
Note: The flap wheel does not work with an impact driver.
Watch the Test for Yourself
Watch Episode 2 of The GlueTread Garage.
Looking for a complete overview of off-road tire repair?
Visit our Off-Road Tire Repair Guide to learn about tread punctures, sidewall damage, valve stem failures, and what repair gear to carry on the trail.
Frequently Asked Questions
Can you repair tire damage on raised lettering?
Yes. The surface needs to be prepped before applying a patch. In some cases, that means trimming down raised areas with a razor knife and then sanding the surface flat. A flap disc can make the sanding process much easier and faster.
Do you need a perfectly smooth surface for GlueTread?
You need a properly prepped surface so the patch can bond. It does not have to be perfect, but raised areas should be leveled as much as possible.
Can I sand down a tire with a drill to prep the surface before patching?
Yes. Using a sanding flap disc with a standard drill is an effective way to prep uneven surfaces. It helps knock down raised lettering and create a smoother area so the patch can bond properly.
What happens if my tire starts to smoke while sanding it?
If the tire starts to smoke, you have gone a bit too far and the rubber has overheated. This can affect how well a patch bonds if you try to repair it right away.
In most cases, you can let the tire cool down, re-prep the surface, and apply a new patch.
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