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Products by application
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Underground waterstop | Azo-Grout™ 458 | Azo-Grout™ 458 is a hydrophobic polyurethane that forms a semi-rigid foam when reacted with water, providing a watertight seal. Use with Azo-Cat™ 26 to accelerate reaction time. Application range:
Underground repair
• Mines
• Tunnels
• Subways | | 
Product Data Sheet (download PDF) | 
More applications and uses
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Underground waterstop | Azo-Grout™ 458