Introduction of construction sealant

Introduction of construction sealant

Construction sealant are mostly synthetic adhesives, whose main body is polymer, and their properties can be divided into three categories: bulk properties, process properties and use properties (product properties).
The functional requirements for sealants in buildings mainly depend on environmental factors: including radiation aging in sunlight, oxidation of oxygen and ozone, erosion of water and water vapor, effects of environmental temperature changes, wind loads, shear forces, and circulation Mechanical (compression/tension) load, invasive air pollution (such as acid rain, salt spray, etc.), the influence of microorganisms and large organisms (fungi, etc.). After understanding the environmental factors, considering the needs of building joints, the functions of building sealants can be summarized as follows: building waterproof, sound insulation, energy saving, corrosion prevention, pollution prevention, fire prevention, decoration, structural elastic connection, structural safety and durability, etc.

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Why Choose JOINTAS?

Pre-sales Support

Pre-sales Support

1. Design consultation 2. Drawing review 3. Sealant recommendation 4. Substrate experiment: compatibility test, adhesion test, pollution test 5. Solution (sealant seam decoration)

In-sales Support

In-sales Support

1. Construction training 2. Process supervision 3. Special treatment 4. Rubber cutting spot check

After-sales Support

After-sales Support

1. Issuing quality assurance documents 2. Project return visits


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Jointas Chemical is listed company specialized in R&D, manufacture and sale of Eco-friendly silicone sealant, thermal paste and water based paints&coatings founded in 1989, China.

We Provide acrylic sealant,anti corrosion coatings, silicone adhesive, construction sealant, silicone caulk, house paint, interior paint, insulating glass sealant, industrial paint, gutter sealant, gap filler, grout sealant, construction adhesive bathroom sealant, waterborne coatings, water-based coating for steel structure,silicone structural, silicone sealant, ms sealant, pu sealant, pu foam, polyurethane sealant, anti corrosion paint, weather sealant, If you feel interested in them ,You can browse related products and initiate consultations on our website.

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Features of construction sealant

After curing, it has excellent weather resistance characteristics and excellent UV resistance, high and low temperature resistance, corrosion resistance and temperature performance. The neutral dealcoholization type cures at room temperature, and the curing agent can be adjusted to cure it even when the temperature difference changes greatly.

Its typical physical properties can form excellent structural strength at -30°C to 120°C. Primer two-component silicone sealant generally does not need primer, but if the adhesion test report indicates that it is necessary to use the primer, before applying the sealant, use a clean, non-linting cloth to coat the primer on the base surface. Spread a thin layer and let it dry. Before applying the sealant, a test must be done to determine whether a primer is required.

User Reviews

What users say about JOINTAS

The sealant has a fine texture and no bubbles, and the taste is very small. It is very convenient to use and dries very fast. The instructions are very detailed. The effect is good after using it.


The packaging of this product is very good, very strict, and the design is very scientific.


The product I bought is really good. The other ones I bought before have a lot of particles in it. They are not smooth to the touch. I don’t know how to use it, and the beauty stitches I bought make it. I really don’t have to say.


The effect is very good! The smell is very small, almost no smell during construction.


The quality is very good. I made it at home by myself. It's okay. The effect is good. The quality is indeed better than the price bought in other stores.


The smell is very small, the gel is translucent, it is smooth to use, and it dries quickly. The anti-mildew effect needs time to test.

Frequently Asked Question

Do you have any question?

Hardness after curing. If the hardness of the sealant is low after curing, and it will collapse when pressed by hand, then such a sealant will have outstanding other properties in time, and it cannot be widely used in electrical appliances or electronics. Whether the surface is smooth after curing. A good sealant can be changed following the shape of the sealing surface, and the surface will not be deformed or uneven after curing.

Only when the various properties of the sealant are guaranteed after curing, can it be a good-quality sealant that can be used in various fields. However, the performance of the sealant cannot be guaranteed before it is cured, and related tests can be carried out after curing, so that various performance indexes are guaranteed. But for the sake of safety, it is best to cooperate with branded products, so that the quality is guaranteed.

1. Cleaning. There are generally dust and loose parts on the surface of the concrete, which need to be thoroughly cleaned to ensure the bonding effect. 2. Primer. Concrete wall panels are made on the factory production line, and a certain amount of release agent will remain on the surface of the panels, which will affect the bonding effect. If the surface of the substrate is not thoroughly cleaned and a suitable primer is applied, it is very easy to cause bonding failure. 3. Deal with bad interface. The part of the glue joint was accidentally sprayed with paint during the paint application, and the compatibility of the paint and the sealant was not good, resulting in debonding. 4. In order to save glue, the construction unit responsible for the glue application has made the sealant very thin, and the thickness of some parts is even less than 5 mm, which makes it easy to debond.

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