Introduction of polyurethane sealant

Introduction of polyurethane sealant

Polyurethane sealant is a sealant whose main components are polyurethane rubber and polyurethane prepolymer.
This type of sealant has high tensile strength, excellent elasticity, abrasion resistance, oil resistance and cold resistance, but it has poor water resistance, especially alkali resistance.
It can be divided into heating vulcanization type, room temperature vulcanization type and hot melt type. Among them, the room temperature vulcanization type is divided into one-component and two-component.
It is widely used in buildings, squares and highways as caulking sealing materials, as well as sealing in automobile manufacturing, glass installation, electronic filling, submarines and rockets.

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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 polyurethane sealant

Polyurethane sealant has the following characteristics: excellent abrasion resistance; low temperature flexibility; wide range of performance adjustment; high mechanical strength; good adhesion; good elasticity, excellent recovery, and suitable for dynamic joints; weather resistance Good, service life up to 15-20 years; excellent oil resistance; resistance to biological aging; moderate price.

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?

This product is used for all kinds of seams that require high displacement capacity and low glue modulus; the main application areas are: building expansion joints, water supply and drainage pipes facing seams, etc.

1. It should be used up within days after opening, otherwise it needs to be strictly sealed and stored; 2. The best construction is under the conditions of temperature 15-35℃ and humidity 55%-75%RH; 3. When the ambient temperature is lower than 10°C or the glue output speed cannot meet the technological requirements, it is recommended to bake at least 30 minutes in an oven at 60°C.

Polyurethane sealant is developed with polymer technology, which is green and environmentally friendly, and will not emit toxic gases to the car. Therefore, car owners can rest assured to buy cars equipped with automobile polyurethane sealant. Automobile polyurethane sealant has good elasticity, so its shockproof performance is very good. It can protect automobile glass windows and other parts for a long time, and can effectively reduce the use cost of automobiles.

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