Belzona 4521

An elastomeric expansion joint sealant for sealing joints in surfaces including concrete, brick and stone.

Belzona 4521

Magma-Flex Fluid

A fast-curing, 2-part flexible sealant designed to provide effective sealing of construction and expansion joints on concrete, stone, brick and other surfaces. This 100% solids material is a cost-effective and high-performance alternative to conventional mastics and sealants, providing joints with up to 25% flexibility and outstanding weather and chemical resistance. It does not require any hot work and cures quickly, ensuring a safe and easy application.
• Provides expansion joint flexibility of up to ±12.5%
• Downtime reduction due to its fast-curing properties
• Reduced future maintenance and eliminates the need for expensive structural rebuild
• Reduced health and safety risks as it is 100% solids
• Application and cure at room temperature – no hot work involved
• Excellent weather and chemical resistance against a wide range of chemicals
• Easy to mix and apply manually with no specialist tools required
• Excellent adhesion to surfaces including concrete, brick, stone and steel
• Building joints sealing on vertical surfaces such as building faces, walls, parapet walls, retaining walls, dams, canal linings, bridges, overhead offsets, pipelines, sidewalks, concrete water tanks, spectator areas (bleachers, stands)
• Expansion joints sealing on horizontal or tilted flat surfaces such as indoors/outdoors floors, ramps, roads, bridges, containment areas, railways, car parks, roofs, paving slabs, foundations
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