Kilmat vs Siless: Which Sound Deadening Material is Better?

As a car buff and music lover, I’ve always been intrigued by the science of getting the perfect sound system in a vehicle. One key to getting great sound is using soundproofing materials.

Kilmat and Siless are two well-known options that promise to lessen vibrations and road noise, making listening more fun and immersive.

Many choices exist, making it tough to pick the correct substance for oneself.

Soundproof Living tested Siless and Kilmat to see which was better at reducing sound. Siless did better, reducing sound by 31 decibels compared to Kilmat’s 29 decibels. This is strange because Siless is thinner and lighter. But, it’s only one test and how well it’s installed can also matter.

In this article, I will compare Kilmat vs Siless in detail, looking at what they offer and what their downsides are, so you can decide which one is best for your situation.

What is Sound Deadening Material?

Sound-deadening stuff quiets a car by absorbing noise and vibration. It’s made of materials like butyl, rubber, foam, and asphalt that soak up sound waves so they don’t bounce around inside the vehicle.

You can put sound-deadening material in many parts of a car like doors, roofs, floors, and trunks. It helps to lower road, engine, and wind noise, which makes the ride less noisy and more enjoyable.

You can pick from different kinds of sound-deadening material that have unique features and advantages. Kilmat and Siless are two common brands that people often compare.

Kilmat Sound Deadening Material

Kilmat Sound Deadening Material

Kilmat quiets the loudness in cars and boats. It’s made of butyl rubber and foil, which soak up sound waves and cut down on noise. Put Kilmat on the doors, roof, floor, and anywhere else in the vehicle to improve sound and comfort. Car buffs and pros in the auto biz often use it.

Advantages of Kilmat

Kilmat, a top player in the hushing sound business, has got you covered with high-grade and low-priced materials for your ride. Check out the perks of using kilmat sound-deadening solution:

  • Kilmat packs a punch with its butyl and foil components, serving as ace soundproofing stuff to suppress unwanted noise and tremors coming from the road, engine, and gusts.
  • Kilmat’s self-adhesive backing makes it a cinch to set up on any surface, including metal, plastic, and fibreglass.
  • Kilmat is a safe bet with its heat endurance and fire retardant, ensuring that your car is soundproofed safely.
  • Kilmat is a stayer with its hard-wearing quality that provides long-term soundproofing performance.
  • Kilmat comes in varying sizes and thicknesses that cater to any car model and budget.

disadvantages of Kilmat

Kilmat dampens sound well, but has downsides to know before buying:

  • It’s not as good as Dynamat or SoundShield for reducing deep noise and shakes.
  • While fixing, it may smell bad, and need airflow.
  • Kilmat may fail in harsh climates, like hot or cold weather, so it’s not always the best choice.

here is the installation process of kilmat in the pickup van:

what is Siless Sound Deadening Material?

what is Siless Sound Deadening Material?

Siless quiets cars. Its synthetic rubber, butyl, stifles sounds and shakes that disturb drivers. Stick it inside car doors, trunks, and any spots that cause a commotion.

Siless is a cheap and efficient solution for auto aficionados. Just peel and paste the material on the car’s interior surfaces. Siless bends and slices easily, fitting any car’s curves.

also read: kilmat vs hushmat: comparison with my personal experience

Advantages of Siless

  • Easy to put in: Siless is made to be straightforward to install. With a self-adhesive layer, the installation is easy.
  • Effective: Siless works well to reduce noise. It can bring down noise levels up to 50%. Its high-grade materials soak up sound waves and keep them from bouncing around.
  • Reasonable: Compared to high-end brands such as Dynamat, Siless is a cost-effective option. It won’t break bank if you are on a budget.
  • Long-lasting: Siless is built to last using high-quality materials. It resists environmental factors like moisture, heat, and more that can cause it to deteriorate over time.

Disadvantages of Siless

  • Siless not as good as Dynamat: Siless works to stop sound, but not as well as fancy Dynamat. If you want the very best sound-stopping, then you should think about spending more money on a pricier option.
  • Might not work for really hot or cold weather: Siless can handle the heat, but it might not work for very hot or very cold weather. If you live in an area with extreme temperatures, then you should think about a different sound-stopping material.
  • Might not work for tough jobs: Siless can last for a while, but it might not work for really tough jobs. If you need sound-stopping material for work or industry, then you should think about another choice.

Kilmat vs Siless: Comparison

Kilmat vs Siless: Comparison

Noise Reduction Comparison

To get a quiet drive, you need sound-deadening stuff. Two brands people talk about are Kilmat and Siless. Let’s compare how they make noise go away.

Kilmat is a famous brand that sells mats made of rubber and foil. They say it can cut vibrations and road noise by 50%. The mats stick well and you can put them on the floor, doors, and roof of your ride.

Siless is a new brand with different stuff to kill noises, like sprays and foams, but they also have mats made of rubber and foil, sometimes with foam. They say Siless can cut vibrations and noise by 70%.

Even though both brands use similar stuff, Siless seems to work better than Kilmat. Remember, different cars have different outcomes. The brand and type of car matter, and so do factors such as the tires and road conditions.

Performance Comparison

Kilmat and Siless are popular sound-deadening materials. Which one is better? Let’s compare them.

Kilmat is made of butyl rubber with an aluminium foil layer. It reduces vibrations and road noise, making rides quieter and more comfortable. Kilmat is durable, water-resistant, and heat-resistant, so it’s perfect for vehicles.

Siless is also a sound-deadening material made of butyl and foil, but it has added closed-cell foam for more sound insulation. It reduces vibrations and noise and is more temperature-resistant.

The better option depends on your needs. Kilmat is durable and effective, while Siless is better for extreme temperatures and additional sound insulation.

Installation Comparison

Kilmat and Siless are sticky sheets that can be cut and stuck on surfaces. Kilmat can fit into nooks and bends, and is light to handle. Putting Kilmat involves prepping the surface, cutting the sheet to size, and applying it as instructed. The steps are easy to follow.

Siless is similar to Kilmat, but a bit thicker, making it more challenging to use. Siless also comes with easy-to-follow instructions. To apply Siless, prepare the surface, cut the sheet to size with a razor blade or scissors, and stick it on the surface according to instructions.

Price Comparison

When buying stuff, the price is a big factor. Kilmat and Siless are both cheap compared to other sound deadeners. But, their pricing is a bit different.

Kilmat comes in different sizes and costs between $0.42 to $1.12 per square foot depending on how much is bought. The more bought, the lower the price. For example, a 50 sq. ft. roll costs around $30, while a 100 sq. ft. roll costs around $60.

Siless varies in size and prices range from $0.40 to $0.75 per square foot. Like Kilmat, the more bought, the lower the price. For instance, a 50 sq. ft. roll costs around $25, while a 100 sq. ft. roll costs around $50.

FAQs For Kilmat vs Siless

Kilmat and Siless are common choices for soundproofing automobiles. Here are some common queries about these products.

how do Kilmat and Siless compare in terms of price?

Kilmat costs between $0.42 to $1.12 per square foot, depending on the roll size. A 50 sq. ft. Kilmat roll is about $30 and a 100 sq. ft. roll is about $60. Meanwhile, Siless ranges from $0.40 to $0.75 per square foot, depending on size of the roll. A 50 sq. ft. Siless roll costs around $25 and a 100 sq. ft. roll is around $50.

Which material is thicker, Kilmat or Siless?

Kilmat is thicker than Siless. The Kilmat product listed in the search results has an 80 mil thickness, while the Siless product listed has a thickness of only 2 mM or 0.08 inches

Can Kilmat and Siless mats be used for other applications besides cars?

Yes, according to the search results, Kilmat and Siless mats can be used for other applications besides cars. While both products are marketed as sound-deadening mats for vehicles, they can also be used in other settings where soundproofing or insulation is needed, such as in homes or offices


Kilmat and Siless hush-up sounds in cars. Kilmat uses butyl rubber and foil, while Siless has more sound-blocking foam. Siless seems to be better at hushing noise, but Kilmat lasts longer and works better.

They’re both easy to set up and not pricey compared to other noise blockers. Remember to study and think about your car, budget, and heat before you decide between Kilmat and Siless.

About Author

this is john Andrew from Australia, I am an architect I have worked for the home improvement company Bunnings. I am a home improvement specialist as well as a part-time blogger. Where I will keep giving you tips on soundproofing, you follow our blog.

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