Sealant | What is the function of sealant?

30 / 11 / 2021

Sealant | What is the function of sealant?

What is sealant?

The so-called sealant literally refers to a glue with a sealing function, but the sealant is not an ordinary glue, but a glue with a certain function.
Sealant is a chemical used for filling, sealing, bonding and coating, they are usually elastomers that conform to the shape of an object and maintain long-term durability. People use asphalt, natural resin, or synthetic resin, natural rubber or synthetic rubber as base materials, and then add some other special materials to make sealants, which play a very important role in the construction industry, transportation industry and electronics industry etc.

What are the types of sealants? What are those sealants used for?

According to the chemical composition of the basic material used for the sealant, the sealant can be divided into polysulfide, polyurethane, silicone, neoprene, butyl rubber, acrylic, etc.
At present, there are three types of organic silicone, polyurethane and polysulfide used in the market. More details pls check, Sealant is widely used in industry. It can be seen in many places, such as sealing in aerospace, sealing of electronic products, transportation, solar energy; sealing of sanitary ware, caulking, decoration, etc. in construction, as well as pipes and fish tanks in daily life.
Here are a few common types of sealants and their uses:
  1. Silicone sealant: silicone sealant is made of a compound composed of siloxane and organic groups, and can be used in high temperature, low temperature and high humidity environments. Silicone sealants are commonly used in automotive engines, aerospace, construction and water pipes, water heaters, etc.
  2. Polyurethane sealant: PU sealant is composed of polyurethane groups, which can cure at ambient temperature and form a strong bond, in addition to having good UV resistance, oxidation resistance, water resistance and Weather resistance, can maintain elasticity and adhesion for a long time. Commonly used to join and seal building materials such as cement, glass, metal and wood.
  3. Butyl Rubber Sealant: This sealant is made of butyl rubber and other materials for sealing, waterproofing and moisture-proofing, such as roofs, walls, floors, containers, etc. Butyl rubber sealants have good oxidation, UV and chemical resistance and are stable at different temperatures.
  4. Acrylic Sealant: This sealant is made from acrylic and other materials and has excellent adhesion and durability. For sealing and bonding in the construction, automotive, furniture and electronics industries. Acrylic sealants are highly elastic and adhesive, curing quickly at room temperature and forming a strong seal.
  5. Polysulfide sealant: Polysulfide sealant is a high-performance sealant commonly used to seal high-temperature and high-pressure environments, such as hydraulic systems, pipes and valves in aircraft and automobiles.
  6. Silane modified polyether(MS sealant):Silane-modified polyether sealant is also called silicone-modified polyether sealant and silane-terminated polyether sealant. Since it does not contain formaldehyde and isocyanate, it has outstanding environmental protection characteristics such as solvent-free, non-toxic, odorless, and low VOC release.
We need the use scene of the sealant to choose the type of sealant, because improper use will cause many problems that need attention. The sealant that plays a structural role on the curtain wall belongs to the silicone type. If polysulfide is used, the aging-resistant curtain wall glass will fall off. Prefabricated buildings use silane-modified polyethers.
  Sealants are classified into single-component and two-component packaging according to the packaging method.
  • The single-component packaging is to mix all the raw materials that make up the sealant together and seal them in plastic bottles or soft packaging aluminum films. Use a caulking gun to punch the product out of the package.
  • Two-component packaging is composed of two components, A and B. Generally, component A is the base rubber, and component B is the curing agent. Fillers and other additives are added to component A and component B as required. When using, special mechanical equipment (two-component sealant mixing machine) should be used to mix components A and B evenly according to the specified ratio. The components are chemically reacted and solidified, and neither component A nor component B can be used alone.

What are the usage scenarios of sealants?

Sealants are widely used in industries such as electronics, construction, ships, automobiles, photovoltaics, etc.
Under normal circumstances, people will use sealant in some occasions to fill holes and gaps. For example, in the kitchen, people will use sealant to seal the gap between the edges, so that the edges can be more closely integrated with the wall, and avoid the soaking of the wall by water stains in the kitchen. Secondly, in electronic appliances, the application of sealant is the most.
In addition, people also use sealant in some other occasions, for example, people use sealant between the door frame and the wall, so as to ensure that the door frame can be well fixed in the wall. However, the quality of sealants of different quality is good or bad. You should choose reliable sealant manufacturers, such as antas sealants, to focus on sealant and adhesive application solutions, It has a wide range of uses and can be applied to construction, home fit-out and retrofitting, new energy, solar photovoltaic module industry, shipbuilding, electronics, automobiles, high-speed rail and other industries.

In general, there are many types of sealants. The above list is a few common sealants and their uses. Different types of sealants have different characteristics and application scenarios. It is necessary to choose the appropriate sealant according to specific needs. if you are not sure which sealant to use, welcome to conact us, we are happy to hlep.

What is sealant used for?
Sealant refers to a sealing material that deforms with the shape of the sealing surface, is not easy to flow, and has a certain degree of adhesion. It is an adhesive used to fill the configuration gap and seal it.
Is sealant and silicone the same?
Sealant and silicone sealant are not the same, silicone sealant is one of a type of sealants.