What is a sealant for a silencer? Manufacturers overview

Exhaust system - an integral element of any car. It provides the unhindered removal of gases, reducing their toxicity, noise and temperature. In addition to catalysts, resonators and other components, the system has a silencer. It is a certain final link in the chain and performs the function of an acoustic filter. But the muffler has a burn out property. Sometimes it is not possible to seal a hole with welding or replace an element with a new one. Then the sealant for the silencer comes to the rescue. This is a great way to repair the exhaust parts in transit, spending a minimum of time on it.

Why is this happening?

The muffler is constantly exposed to aggressive influences. This is moisture, road reagents, large temperature differences. Plus, the element undergoes strong vibrations inside. Because of this partition and the "bank" itself loses its former strength. As a result, in the weakest place, a burn is formed. In rare cases, the pipe itself is cracked. This often occurs at the junction of the resonator or the catalyst.

Symptoms of a malfunction

Determining the breakdown is very simple. If a burnout occurs in the silencer, it will no longer suppress sound vibrations. Gases will leak outwards along the shortest path, bypassing the acoustic partitions. In practice, this is accompanied by a loud exhaust.

Properties of sealant

What does the sealant for the silencer do? It is a composition that, after application, takes on a solid form and prevents the gases from seeping out. It is a kind of liquid patch, which is usually used as a temporary repair. The sealant differs from conventional glue not only in consistency, but also in characteristics. So, it is very heat-resistant. The silicone sealant is able to maintain its structure at 1300 ° C or more. Can be used both in joints for repair of cracks, and in places of burnout. The sealant is resistant to moisture and water, and is not afraid of sound vibrations. It can also be used as an analogue to metal gaskets. The latter wear out quickly and cause backlash. The sealant also gives a solid shrinkage of the parts and does not change its properties for a long time.

How to use?

The instructions for use are quite simple. It is enough to clean the damaged surface from dirt and apply the composition from the tube. Removing corrosion is not necessary - many manufacturers allow application to a rusty surface. It is important that the composition completely covers the burnt hole. Then you need to wait until the sealant is silicone heat-resistant will not get a solid look. At each manufacturer this period is different - from 30 minutes to 2 hours. Full hardening lasts about 24 hours at a temperature of +20 ° C. What sealant for a silencer is better to choose? To answer this question, below we compiled a list of the most popular products that are used in the domestic market.

"Liquid Moli"

This is a very famous German company, which has long established itself as its quality products. The company "Liquvi Moli" produces good sealants for silencers. The product is designed to improve sound insulation and to prevent corrosion in the joints. It is a ceramic sealant for a silencer, capable of withstanding the pressure of exhaust gases at temperatures up to 1400 ° C. The price of a 150-gram tube is 400 rubles.

CRC Silicone Sealant

This is, perhaps, the most quick-drying sealant for a silencer high-temperature. It hardens even after 10 minutes of engine operation on the "idle" ones. Excellent for repairing breakage on the road or just for sealing cracks. It operates at a temperature of up to 1300 degrees and provides high-quality noise insulation and protection against unauthorized outflow of gases to the outside. Not afraid of vibrations, water and reagents. Judging by the reviews, this is one of the best products in the line of sealants. The cost is 400 rubles for 200 grams. Also this company produces sealants for the cooling system and emergency repair of tires.

Permatex

The composition is a kind of putty that can withstand heating to 1000 ° C. Suitable for sealing pipes, joints, silencers and resonators. It is applied directly to the damaged area, previously cleaned of dirt and rust. It hardens after 30 minutes. The cost of a tube weighing 200 grams is 290 rubles.

"Abro"

Very popular product in Russia. A tube weighing 150 grams can be bought for 170-200 rubles. The manufacturer characterizes the composition as "cement silencer". The product for a short time turns from a pasty state into a real stone. Withstands temperatures up to 1100 ° C. Suitable for repairing all parts of the exhaust system, including catalytic converters.

Conclusion

So, we found out what the sealant for the silencer is. With this tool, you can quickly repair the damaged area without using a welding machine. Moreover, the breakdown can be eliminated locally, without removing the muffler from its place. It's very convenient and fast.