In the construction and automotive industries, polyurethane sealant adhesive are indispensable sealing materials. Do you know about polyurethane sealants? This article will introduce them in detail.
1. What is polyurethane sealant?
Polyurethane Sealant is a one-part, moisture-curing, elastic joint sealant suitable for bonding, sealing, filling gaps, keeping water and air away from joints, and absorbing the natural movements of building materials.
2. Characteristics of pu sealant adhesive
(1) Excellent weather resistance
Resistant to weather conditions and chemicals, good durability, non-powdering, and cracking.
(2) Convenient construction
Single-component and standard caulking guns are available.
(3) Safe and environmentally friendly
Safe, and non-toxic, it is an environmentally friendly product in contact with drinking water.
(4) High abrasion resistance and tear strength
(5) No corrosion to the substrate
Neutral, no pollution, curing under normal temperature, no corrosion.
(6) Good slump resistance, non-sag
(7) Paintable, good compatibility with paints.
3. PU sealant application
Polyurethane pu sealants are mainly used in the construction industry and the automotive industry
The main applications in construction are:
- Roof and underground construction
- Bridge, tunnel, culvert, hydraulic engineering
- Sealing joints in the concrete roads and bridges.
- General sealing for construction joints.
- Sealing joints in the airport runway.
- Repairing and sealing the cracks of buildings.
- All kinds of pre-buried pipelines, through-wall steel bars, H-beams, pile caps, and other waterproof.
The hot-selling construction sealants are mainly:
- TP630 Self-Leveling Polyurethane Sealant
Polyurethane sealant is a one-component sealant with low modulus and excellent elasticity. It is especially suitable for sealing joints for multi-porous materials. - TP640-220/400 Water Swelling Polyurethane Sealant
TP640-220/400 is a one-component, water-swelling elastomeric sealant. It is based on the prepolymer of polyurethane and contains a special water-swelling unit. It has elastic rubber sealing water and a double-sealing sealing mechanism of water expansion and water-stopping after water. It is suitable for waterproofing of concrete construction joints. - TP680 Construction Polyurethane Sealant
TP680 is a moisture-curing one-component elastic polyurethane sealing adhesive. Ideal for sanitary facilities, roof and underground construction, bridge, tunnel, culvert, hydraulic engineering, joints in the roof and gutter, and joints in water pipes, containers, tanks, and silos.
The main applications in the automotive industry are:
- The installation of automotive windshields
- Seal for weld joint of autos and machines.
- Seal for joints of containers and shelters.
- Seal and waterproofing for joints of van vehicles.
- Seal for bus air-conditioning during installation.
- As an adhesive for metal plates of the autos.
The best-selling automotive sealants are mainly:
- TP702 Windshield Polyurethane Sealant
TP702 Polyurethane Sealant for the windshield is one component, moisture-curing, non-sag, fast-cure polyurethane sealant for the windshield. - TP703 Urethane Sealant
TP703 is a single-component PU sealant. It can be widely used in car body metal bonding. After curing, it provides a permanently elastic bond to fasten materials with the framework of the car. It’s water-proof age-resistance, solf, and good bonding performance.