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Can I use an epoxy bonding agent with rapid-set concrete repair mortars?

No. Epoxy bonding agents are not recommended with rapid-set concrete repair mortars due to incompatibility with setting times. Rapid-set mortars begin to stiffen and harden quickly, often within minutes. Epoxy bonding agents take longer to cure and may still be tacky when the repair mortar starts setting, leading to poor adhesion.

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