As a truck owner, you can benefit from both a bedliner and a sound deadener. The bedliner will protect your truck bed from damage by acting as a protective coating.
On the other hand, the deadener will shield any noise that may affect your driving experience. In most trucks, you will either find a sound deadener or a bedliner.
What if you want both? Is it possible to spray the bedliner over the sound deadener and get both benefits? Keep on reading to find out.
Will Bedliner Stick to Sound Deadener?
Spray bedliners are designed to stick to metal. Therefore, some challenges may occur when you spray the bedliner over the sound deadener.
Bedliner can stick to sound deadener. However, that will depend on the brand of bedliner you intend to use. Bedliners are made using different formulas. Some formulas can stick to matting and others don’t.
Therefore, before embarking on such a project, you need to read through the instructions that come with the bedliner kit.
On these instructions, check whether that bedliner is recommended for use on sound deadener or a similar material. If it’s approved for use, you can proceed to spray the bedliner over the sound hardener.
Herculiner and Durabak are good examples of spray-on bedliners that can stick to sound deadeners. However, when spraying the bedliner over a sound deadener, you will have to be very careful.
You may have to use a quality primer and it’s advisable to be patient between coats to ensure it dries up well.
What are Some of the Challenges of Spraying a Bedliner Over a Sound deadener?
Sound deadeners aren’t designed to be coated with bedliners. Therefore, there are a lot of things that can go wrong with this project. however, out of all the issues you may run into, there is one that may be the most destructive.
Sound-deadening materials are often pretty soft. They are softer than plastic and that’s where the problem comes in. When the bedliner is sprayed over sound-deadening material, the former may start to flex after a while and that would make it tear up.
However, you can prevent this from happening by spraying a thick layer of bedliner. The thicker the bedliner the more resistant bedliner would be to flexing because of being layered on top of a sound deadener.
Can You Mix Sound Deadeners and Bedliners, then Spray Them Together?
Another smart idea that may cross your mind when it comes to enjoying the benefits of both bedliner and sound deadeners is to mix these two and spray them together. Though possible since we have spray-on sound deadeners as well, it’s not advisable to do so.
Sound deadeners and bedliners are made from different ingredients. Therefore, the likelihood of these two products mixing would be hard. In the mixture, the sound deadener could settle at the bottom or vice versa.
Therefore, you could spray on the bedliner first and the sound deadener second, and you won’t receive any soundproofing benefits.
Secondly, such a mixture may not even work or hold since its structure is compromised. As tempting as this idea may be, refrain from trying it out because it can have adverse side effects.
✔ Heavy-Duty, Long-Lasting Protection – Forms a durable, UV-resistant urethane coating that withstands scratches, rust, stains, and extreme weather—perfect for truck beds, undercoating, trailers, and more.
✔ Complete 2K Kit – Includes 4x 750ml bottles of black liner base, 1x 1L hardener, spray gun (8 CFM @ 50–60 PSI required), and full instructions—covers a 6 to 8 ft truck bed.
✔ Quick & Customizable Application – Fill, shake, and spray using the included gun, or use a brush or roller for custom textures. Dries fast, allowing multiple coats in under an hour.
✔ Flexible & Sound Dampening – Maintains impact resistance and flexibility, helping reduce vibration and road noise while preventing corrosion and chemical damage.
✔ Trusted Performance by Raptor – Backed by Raptor’s reputation in automotive refinishing, this kit delivers a professional-grade finish trusted by DIYers and pros alike.
Can You Use Sound Deadener as a Bedliner and Vice Versa?
Since there are some complications associated with spraying the bedliner over a sound deadener, you may consider using one to get both benefits. For instance, you could decide to use the sound deadener as a bedliner.
Even though sound deadeners are pretty durable these days, they can’t provide the protection that comes with a bedliner.
With only a sound deadener, the only benefit you will get is a quieter ride. Your truck bed will be unprotected and if you often carry cargo, the sound deadener will wear out pretty fast. You will have no option but to replace it after a short duration.
On the other hand, a bedliner can’t double as a protective coating and a sound dampener. Your truck will be protected from all elements.
But you will still hear some noises coming from the back of your truck. The bottom line is that you can’t get both benefits from only one product.
✔ Powerful Sound Deadening – 80 mil thick butyl material with aluminum foil backing provides outstanding noise reduction and vibration control.
✔ DIY-Friendly Installation – Strong self-adhesive backing and easy-to-handle sheets make application simple, even for beginners.
✔ Heavier, Thicker, Better – 1.5 times thicker than standard deadening mats for improved performance in sound insulation and heat reduction.
✔ Built-In Installation Guide – Embossed foil pattern flattens when properly installed, ensuring a professional finish every time.
✔ Lightweight and Effective – Weighs just 0.5 pounds per square foot, offering maximum noise and heat control without adding unnecessary bulk.
Can You Live Without Both?
Even though both sound deadener and bedliner are considered add-ons, each plays a crucial role. With a sound deadener, you enjoy a much quieter ride. If you have a very noisy truck, you must install a sound deadener.
Otherwise, you and your passengers wouldn’t enjoy long trips. When it comes to bedliner, our cars are exposed to a lot of harmful elements.
Ordinary paint isn’t strong enough to withstand such. This is where the bedliner comes in handy. This coating is strong enough and can protect your car from anything thrown at it.
Even though one can live without a sound deadener and bedliner on their cars, having them around comes with many benefits. That’s why it’s important to find a way for how each of these two can coexist alongside one another in harmony.
Tips on How to Spray Bedliner Over Sound Deadener
Most factory sound deadeners come with a foil backing. If you have installed a spray-on sound deadener, then this should be a cause for concern.
Back to the foil backing, this is what causes the biggest challenge when spraying the bedliner over it. The foil backing acts as a shield and it’s hard for the bedliner to stick to the foil backing.
A pro tip to ensure the bedliner sticks to the sound deadener is to create several small gaps. Through these gaps, the bedliner will seep through and adhere to the metal substrate beneath.
When it cures, these gaps filled with the bedliner will hold both the headliner and sound deadener to the metal. be careful not to ruin the sound deadener.
Also, you must make as few gaps as possible. When you make more gaps in the sound deadener, you will interfere with its effectiveness.
Another pro tip that can ensure the bedliner sticks firmly to the sound deadener is to make sure all the edges are adequately covered with the bedliner.
When you cover the edges, the sound deadener will have no room to pull back and tear the cured bedliner. Don’t forget to spray thick amounts of bedliner.
Will Bedliner Last Over Sound Deadener?
How long the bedliner lasts over the sound deadener will depend on several factors. First, you must have applied it correctly.
If you use the tips we have shared above such as perforating the foil backing so that the bedliner can stick to the metal beneath.
That will ensure the project lasts for longer. Also, the other thing that will determine how long the bedliner lasts over the sound deadener is the thickness sprayed. If it’s too thin, the sound deadener will flex and break the cured bedliner. Make sure that you spray thick amounts.
The quality of the two products also matters. Bedliners and sound deadeners are not created equally. Some last longer than others.
Therefore, if you choose an inferior product, it may not last for very long. you also have to understand that this is more of a hack and not a recommended way of doing things.
Yes, people have layered sound deadeners with bedliner but not everyone does. You can use these two as a quick fix for a noisy truck. But in the long run, you will have to invest in a more thorough soundproofing system.
You Can Always Perform a Patch Test
As we have mentioned earlier, this isn’t a popular project. Only a few people have sprayed the bedliner over the sound deadener. Therefore, if you want to fully determine whether this will work.
Don’t hesitate to perform a patch test. All you have to do is spray some bedliner on a small section of the sound deadener and see how long it will last.
A patch test will give you more insight into the capabilities of bedliners sticking to sound deadeners. You can also experiment with various brands and determine which is more effective.
What Should Go First; Sound Deadener or Bedliner?
The product that should go first is the sound deadener. When you spray the bedliner first and then cover it with a sound deadener, the latter may not work very effectively.
That’s because there will be some space between the two. If you are interested in using both, kindly start with the sound deadener and then spray the bedliner.
If you are considering using a bedliner first, it’s better to use it alone and forget about the sound deadener.
Even though the soundproofing properties of the bedliner can’t match those of a sound deadener, it can slightly minimize the noise getting into the cabin. Not forgetting that the bedliner will also protect your car from damage.
Should You Spray the Bedliner Over the Sound Deadener?
Even though it’s possible to get the bedliner to stick to a sound deadener, there are some challenges that we have discussed in depth. Understandably, you may want to enjoy both soundproofing and protection.
However, these two materials are not compatible. Sound deadeners are usually very soft. Therefore, as they flex, they can cause the cured bedliner to crack.
If you must spray a bedliner over a sound deadener, follow the tips we have shared above for better and longer-lasting results.
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