Belzona 4521 (Magma-Flex Fluid)

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

Belzona 4521 (Magma-Flex Fluid)

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

Belzona 4521 (Magma-Flex Fluid) is a fast-curing, 2-part flexible expansion joint filler designed to provide effective sealing of construction and expansion joints on concrete, stone, brick and other surfaces. This solvent-free expansion joint sealant 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 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
  • Expansion joints sealing on horizontal surfaces such as floors, bridges, roadways, car parks and manufacturing facilities
  • Sealing of leaking joints in secondary containment areas

4 KG and 896 KG

Note: Sizing and availability may change per region. Please contact Belzona for details.

* All products are subject to regional restrictions. Check with your local Distributor for more information.

Product Applications

Documents

Similar Products

| Belzona 1813  | Belzona 1814  | Belzona 1818  | Belzona 1812 

Can Be Used Together

| Belzona 1121 | Belzona 1131 | Belzona 1151 | Belzona 1161 | Belzona 1311 | Belzona 1818 | Belzona 1814

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QUESTIONS & ANSWERS

Belzona recommends using Belzona 4521 as a concrete expansion joint filler.
To apply the concrete expansion joint repair epoxy, Belzona 4521 (Magma-Flex Fluid), the surface must be clean, dry, and firm, and it must be free of rust, paint, and other surfaces coatings and contaminants. In addition, any new concrete must be dry and cured for at least 28 days. Condition the area using Belzona 4911 (Magma TX Conditioner). Next, shake the Solidifier well before use and transfer the entire contents of the Solidifier can into the Base container. Mix thoroughly for a minimum of three minutes to achieve an even consistency. Then, apply the Belzona 4511 into the joint avoiding air entrapment. When the joint is filled, a suitable scraper should be used to remove any excess material. Finally, allow the product to cure. Please see the Instructions for Use (IFU) for more information.
The cure time of the expansion joint repair system, Belzona 4521 (magma-Flex Fluid), is as follows:
Temperature Light loading Full mechanical or thermal loading
50 °F (10 °C) 24 hours 2 days
72 °F (22 °C) 8 hours 1 day
86 °F (30 °C) 4 hours 12 hours
104 °F (40 °C) 2 hours 6 hours
122 °F (50°C) 1 hour 3 hours
Please see the Instructions for Use (IFU) for more information.