Belzona 4521 (Magma-Flex Fluid)

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

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 solvent-free 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.

Key benefits:

Provides expansion joint flexibility of up to 25%
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 solvent-free
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

Applications for Belzona 4521 (Magma-Flex Fluid) include:

Expansion joints sealing on horizontal surfaces such as floors, bridges, roadways, car parks and manufacturing facilities
Sealing of leaking joints in secondary containment areas

Key technical data:
Working life at 20°C (68°F)	45 minutes
Time to mechanical cure at 20°C (68°F)	4 days
Peel adhesion (ASTM D421)	26 pli (460 kgs/m) on blasted steel
Volume capacity	1612 cm³ (98.4 cu.in.) per 2 kg
Bonds to	Concrete, stone, brick, steel, other Belzona 4000 Series materials and many more
Typical applications	Elastomeric expansion joint sealant
Unit size	2 kg. Pack sizes may vary locally.
Availability*	Global