Polyurethane Sealant

Polyurethane Sealants Used for Sealing Purposes

Shore A hardness up to 45 polyurethane sealants are classified as low modulus. It is used in joints between prefabricated building elements, in joints of rainwater collection pipes on roofs and in rain gutters, insulating joints between precast concrete blocks and sealing of joints of aluminum pipes in HVAC (ventilation) sector.

Polyurethane sealants are available in the market with the following names; Polyurethane construction sealant, polyurethane sealant, non-staining polyurethane sealant, UV resistant PU sealant, bubble-free polyurethane sealant and modified silicone sealant.

Polyurethane Sealant Formulations and Uses

Polyurethane sealants are among the most widely used technology for both new and renovation construction projects. Available in single and multi-component formulations, polyurethane sealants are mainly used in horizontal joints or non-sagging, vertical applications. In particular, these include:

• Isolation joints
• Roofing
• Foundation
• Gutters
• Expansion and control joints

Once the polyurethane polymer is formed, other raw materials are added to it, giving the finished sealant varying degrees of quality and performance functionality.

Polyurethane Sealant Advantages

Polyurethane sealants offer many advantages, including:

• Excellent tear and abrasion resistance
• Fair chemical and weather resistance
• Ability to be used in a broad range of joint sizes
• Adhesion compatibility with many construction substrates, such as stone, metal and wood

As a result, these advantages make them suitable for many construction applications.