Sealants for Weatherproofing and Structural Joints

Sealants form integral, flexible joints that prevent water and air infiltration while allowing movement. They are essential in construction, glazing and mechanical assemblies where a reliable barrier and long-term performance are required.

Choosing the right sealant

Consider substrate compatibility, expected movement range, exposure to UV and chemicals, and curing profile. Silicone, polyurethane and hybrid MS polymers each offer distinct benefits: silicone excels in weather resistance, polyurethanes in adhesion to some substrates and hybrids balance performance with ease of use.

Application best practices

• Preparatory work: Remove old sealant, clean joints thoroughly and use primers where recommended.
• Joint sizing: Follow manufacturer guidance on width and depth for optimal performance.
• Tooling and finish: Tool joints within skin time to ensure adhesion and aesthetics.
• Inspection: Regularly inspect critical seals in exposed installations and replace when degraded.
• Health & safety: Observe ventilation and PPE recommendations during application.

Review technical sheets and certifications for building regulations. Deal platforms can list clearance or returned sealant products that may suit maintenance teams—always confirm storage conditions and expiry before using in critical sealing tasks.