While applied in very similar fashions, and at similar times to the surface of new concrete, concrete curing agents and retarders are actually used to achieve different effects to the top face of the concrete, and should not be used in conjunction with each other.
What are Curing Agents for Concrete?
Concrete curing agents are either solvent-based acrylic resin polymers or water dispersed acrylic emulsions that are used to cure, harden and seal fresh or hardened concrete. By forming a film over the surface of the concrete, curing agents optimise the curing of the concrete by ensuring that full hydration is achieved.
The result is a higher strength and more durable concrete than if a curing agent was not used, as well as a reduction in surface dusting and cracking.
What are Surface Retarders for Concrete?
Sometimes called surface deactivators, surface retarders are used to deliberately delay the set of the surface of the concrete whilst allowing the rest of concrete to continue curing normally, without affecting the setting rate or strength gain.
When washed away after curing is complete, the surface retarder exposes the surface aggregate within the concrete, which can be to provide one of two benefits, either to create an improved and more receptive surface for the keying of subsequent concrete pours, or to create an present a more decorative finish to the surface of the exposed concrete.
Contact BaseTec - Complete Systems. Reliably Delivered.
If you require assistance with concrete curing agents and retarders or need advice on which curing agent or retarder product is best suited for your requirements, contact our friendly teams in Kent - 01732 906 826 - or Leeds - 0113 521 6789.
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