Sealants for construction comprise of various materials formulated to fill and seal gaps, joints, and cracks in building components, preventing air, water, moisture, and sound infiltration. They play a crucial role in maintaining the integrity and performance of structures by providing protection against environmental factors.
Silicone Sealants
Silicone sealants are synthetic polymers composed of silicone elastomers. They are known for their flexibility, durability, and resistance to UV radiation, weathering, and extreme temperatures.
Silicone sealant exhibits excellent adhesion to a wide range of substrates, including glass, metal, plastic, and masonry. It remains flexible over time, accommodating movement and thermal expansion and contraction without cracking or shrinking.
Polyurethane Sealants
Polyurethane sealants are formulated from polyurethane resins, which are synthetic polymers derived from the reaction of isocyanates with polyols. They are known for their high strength, durability, and flexibility.
Polyurethane sealant offers excellent adhesion to a variety of substrates, including concrete, wood, metal, and plastics. It is resistant to water, chemicals, and abrasion, making them suitable for both interior and exterior applications.
Polysulphide Sealants
Polysulphide sealants are based on polymers containing sulphur-sulphur bonds. They are known for their excellent chemical resistance, elasticity, and durability.
Polysulphide sealant has good adhesion to a variety of substrates, including metal, glass, concrete, and wood. It is resistant to water, fuel, oil, and many chemicals, making them suitable for demanding applications.
Sealant Applications
Silicone sealants are commonly used for sealing exterior joints, such as window frames, curtain walls, and expansion joints. They are also used in wet environments, such as bathrooms and kitchens, due to their water-resistant properties.
Polyurethane sealants are widely used in construction for sealing joints in concrete structures, such as expansion joints, control joints, and precast panels. They are also used in automotive, marine, and industrial applications due to their durability and weather resistance.
Polysulphide sealants are commonly used in construction for sealing expansion joints in concrete structures, such as highways, bridges, and airport runways. They are also used in marine and aerospace applications due to their resistance to harsh environments.
When selecting sealants for a construction project, factors such as substrate compatibility, joint movement, environmental exposure, and application requirements should be considered. It's essential to choose sealants that are compatible with the specific conditions and performance requirements of the project to ensure effective sealing and long-term durability.
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If you require assistance with sealant products or need advice on which sealant is best suited for your requirements, contact our friendly teams in Kent - 01732 906 826 - or Leeds - 0113 521 6789.
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