Polyurethane sealant is a one-part, elastomer sealant based on urethane which cures at room temperature. It is mainly used in applications relating to assembling and sealing. For these applications, the product is referred to as adhesive sealant or polyurethane adhesive sealant.
The main attractive features of polyurethane sealant is its good resistance to impacts and vibration due to its elasticity (the product can be used to assemble materials with different coefficients of thermal expansion), and its impressive mechanical performance.
Factors to consider when choosing between a polyurethane and an acrylic sealant?
When producing a polyurethane sealant seal, and depending on the nature of the intended application, a compromise needs to be found between:
- the flexibility of the seal produced to assemble two different materials
- the “firmness” of the seal needed to provide a sealing function.
Polyurethane sealants are suited to bonding a wide variety of materials, notably porous materials (concrete, plaster, etc.), metals, glass and a large number of plastics. Consequently, this type of polyurethane sealant can be used in many applications, such as car bodywork.