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Two-component Polyurethane Sealant with Good Wear-resisting Ability

Polyurethane rubber and the prepolymer of polyurethane are the main components of polyurethane sealant. Polyurethane sealant can be divided into three kinds: heating curing polyurethane sealant, room temperature vulcanized polyurethane sealant and hot melt polyurethane sealant. And the room temperature vulcanized polyurethane sealant is divided into two kinds: one-component polyurethane and two-component polyurethane sealant. Two-component polyurethane sealant (double-component polyurethane sealant) is mainly used in the secondary sealing of hollow glass, and one-component polyurethane sealant is mainly used in the sealing of automobile.

Two-component polyurethane sealant includes A component and B component, and the two components react to cure. A component is milk white or light yellow viscous prepolymer of polyurethane. B component is black paste or liquid that is produced by curing agent and auxiliaries mixed and dehydrated. It has certain elasticity and cohesiveness after curing.

A small white bottle and a plastic bag on a white plastic drum.
Primer makes the adhesion effect better.
A white plastic drum on the floor.
A component is milk white even paste, and it has clear color difference from B component, making the mixing easier.
Six drums in a carton, 5 drums A component, 1 drum B component and a bottle of primer and a brush.
A component and B component in one carton, it is easier to transport and use.
Five white drums and a blue drum in a carton.
A component and B component are packaged together, making mixing easier.
Physic-mechanical Coefficient of Two-component Polyurethane Sealant
Item (Unit) Techniques
Density (g/cm3) 1.2-1.4
Expiration (h) ≥3.0
Surface-dry Time (h) ≤72
Coefficient of Seepage ≤2.0
(Fluid) Pendulousness (mm) ≤3.0
Temperature Flexibility (°C) -30
Extension Conglutination Maximum Expansion Strength (MPa) ≥0.2
Maximum Extension Rate (%) ≥200
Restoration (%) ≥85
(Tensile-compressive Cycle Strength) Conglutinate Damage Area (%) ≤25
Weight-loss of Heat (%) ≤6.0

The classification of two-component polyurethane sealant:

  1. It can be divided into two kinds according to the flowability: non-slumping and self-leveling.
  2. It can be divided into two kinds according to the movement ability: 25 and 20.
  3. It can be divided into two kinds according to the tensile modulus: high modulus (HM) and low modulus (LM).
A white drum on a carton.
The flowing two-component polyurethane sealant is easier to operate.


  1. Excellent wear-resisting performance.
  2. Good softness at low temperature and good adhesion to a variety of materials.
  3. Outstanding weather resistance, oil resistance and aging resistance.
  4. Good elasticity and recovery ability.
  5. Suitable for dynamic joints, deformation joints and expansion joints.


  • It cannot be resistant to heat for a long time, and may produce bubbles or cracks in high temperature environment.
  • Need to do base coating on most occasions.
  • Poor resistance to water, especially alkaline water.


  • A component: 200L/iron drum, B component: 20L/iron drum.
  • A component: 20L/plastic drum, B component: 2L/plastic drum.
  • Packed as customers' requirements.

Shelf life: 12 months in the original unopened package, stored in dry and cool environment, and the temperature is between +5°C to +35°C.

Color: A component is milk white or light yellow, B component is black.

Our products are all tested before sell to confirm that our products are eligible.

A plastic bag and a white plastic drum on an electric scale.
Products are weighed to guarantee the high quality.
A small white bottle on an electric scale.
The primer must be up to the specified weight before sell.


  • It is used in sealing joints of civil construction and transportation.
  • It is also used in the connection of building materials, such as concrete preformed units.
  • Besides, it is used in the connection and sealing joints of advanced roads, bridges, airstrips and underground pipelines.
  • What's more, it is used in the waterproof and sealing expansion joints and deformation joints of tunnels and buildings.
Several workers are constructing in tunnel.
Two-component polyurethane sealant used in tunnel, makes the tunnel has longer service life.
Two sealed concrete joints.
Two-component polyurethane sealant makes the joint firm and solid.
A person is squeezing the mixed black sealant into a wide joint.
Two-component polyurethane sealant makes the joint sealed and stout.
A section of road with sealed joint.
Two-component polyurethane sealant using on the road, makes the road safer and solid.

Inquiry for Our Product

Hebei Ruida Engineering Rubber and Plastics Co., Ltd.
E-mail: sales@polyurethane-sealant.com

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