High Temperature Silicone Adhesive

High Temperature Silicone Adhesive

High temperature silicone adhesives maintain their flexibility and other physical properties at a much wider range of temperatures than other types of sealants. They also retain their ability to bind items together, even when subjected to a lot of stress.

One part acetoxy cure adhesive that adheres to clean metal, glass, many types of wood, ceramic and plastic surfaces. Fully cured it resists moisture, ozone and UV radiation.


If an object will be exposed to high temperatures, you need a strong and durable adhesive that can keep its strength even in these conditions. Heat resistant silicone sealants are specially formulated to handle hot environments without losing their effectiveness. They are used to bond, seal and encapsulate surfaces in applications where normal adhesives might fail.

The ideal high temperature adhesives are those that are easy to use, provide a long lasting bond and are suitable for a variety of substrates. high temperature silicone adhesive They should also be able to resist weathering and ageing, as well as most chemicals. Some of these adhesives can be used on a wide range of materials, including metals, rubbers and plastics.

RTV Silicone Red Acetoxy Sealant is a one-part, non-slumping high-temperature resistant silicone adhesive. It can be used on a variety of surfaces, is free from solvents and cures to a tough silicone rubber. It is extremely strong, resilient and flexible, and can withstand continuous exposure to temperatures up to 500°F. It is a high-temperature silicone gasket maker that can be used on equipment, electrical appliances and more.

Flex 310 M Crystal from Weicon is an acetoxy-cure silicone sealant that can be used indoors or outdoors, is highly water resistant and can be painted, sanded or ground. This is a low viscosity sealant that can be applied with a caulk gun. This can be used for sealing and bonding around window frames, vents, doors, machinery, truck cabs and trailers and much more. This adhesive is a high-temperature silicone that is resistant to fresh and salt water, ozone and UV radiation.


Silicone adhesives stay flexible after curing, even in high-temperature conditions. This flexibility helps them resist expansion and contraction that would otherwise place strain on the bond. This property is especially useful for applications where dissimilar materials experience considerable temperature changes. For example, silicone adhesives are often used to seal components in car engines that experience frequent vibration and temperature changes. They also help seal automotive components such as water and oil pumps, axle housings and fuel pump covers.

Depending on the application, there are many different options for applying high-temperature silicone adhesives. Some silicones cure through moisture in the air, while others require a specific curing method such as heat or UV radiation. When choosing a high-temperature silicone adhesive, it is important to understand the exact requirements of the application. This will ensure the correct application process and provide a high-performance solution.

One common type of high-temperature silicone is the RTV silicone. This type of silicone is a low-pressure, room-temperature vulcanizing silicone that can withstand a wide range of temperatures and environments. This is the type of silicone often used in aerospace applications, as it can handle high temperatures and space conditions while still maintaining a good level of flexibility. RTV silicones are also very useful for applications where substantial expansion and contraction is expected in a joint, as they can reliably absorb these stresses to prevent them from impacting interfaces.


In industrial applications, adhesives must withstand a variety of harsh conditions. This includes high temperatures and high temperature silicone adhesive exposure to chemicals, both of which can affect the durability of the adhesive. Silicone adhesives are highly resistant to these factors and are non-chemical reactive, which makes them a durable option for most applications.

In addition to the resistance of silicone adhesives to high temperatures, they also have excellent elasticity and remain flexible even after prolonged periods of heat exposure. This characteristic has allowed them to be used as a bonding agent for many different types of surfaces, including metal.

When compared to traditional adhesives, silicones are a great choice for high temperature bonding and sealing. Unlike some other adhesives, silicones are designed to maintain their integrity at all temperatures and can even be used in hot environments like saunas or steam rooms.

Momentive offers a range of high temperature silicone adhesives that meet the needs of various industries, including aerospace and automotive. They are available in a wide range of options, including one component addition cure silicones that require the addition of a curing agent, low silicone volatiles silicones that can be used in automotive applications and a number of different temperature resistance grades. A good example of a high temperature silicone is our Supex High Temperature Gasket Silicone Adhesive Sealant, which can be used in automotive applications that require 600oF silicone flange sealants.

Heat Resistance

Heat resistance is an important factor to consider when selecting a silicone sealant. Some can withstand temperatures up to 500°F, making them suitable for sealing, insulating and bonding areas that will be exposed to high levels of heat. This is especially useful in applications such as sealing heating installations and engines.

High-temperature silicones are also resistant to degradation, so they will continue to function well in the long term. They are also non-toxic and won’t react with most common solvents, which makes them safe for use around chemicals and water.

Silicone adhesives and sealants are available in a variety of types, based on their intended use. Some have additional properties, such as being low odor or electrical grade. Others are formulated to be pliable, which makes them better suited for curved surfaces or joints. Some are even formulated to resist specific environments, such as freezing or humid conditions.

Before using any type of silicone sealant, it’s necessary to determine what surface the material will be applied to and whether it is likely to be in direct contact with water. Acetic acid-curing silicones will release a vinegar-like odour, while neutral alkoxy sealants have no odour and adhere to a wide range of materials, including glass, metals and plastics.