CureLock™ Concrete Curing Hessian (Burlap)

CureLock™ Concrete Curing Hessian is a woven jute cloth made for one job: keeping fresh concrete wet while it cures. Soaked and laid over slabs or wrapped around columns, it holds a film of water on the concrete surface so the cement hydrates fully, reaching its design strength without shrinkage cracks or weak, dusty surfaces. Industry guidance from the Portland Cement Association notes that wet coverings like hessian outperform curing compounds, because they keep the concrete continually damp instead of only slowing moisture loss. The material has its own specification for this use: AASHTO M 182, for burlap cloth made from jute or kenaf.

Choose from two grades. CureLock 213 Standard (213 g/m²) is light and easy to handle, and suits columns, beams, walls, stairs and small to medium slabs. CureLock 270 Heavy Duty (270 g/m²) is a denser, stronger weave that holds more water, so it is the better choice for large slabs, pavements, bridge decks and pours in hot, dry or windy conditions. Both come in 1015 mm wide rolls, with other widths and lengths available on request.

Every roll is checked on arrival against its mill certificate for grade, width and cleanliness, and new cloth is rinsed in clean water before use, as ACI 308 and PCA guidance require, so it absorbs water evenly and will not stain the concrete. For sites where water is scarce, CureLock can be capped with polythene sheeting to ASTM C171, which holds moisture in the cloth and cuts how often it must be rewetted.

Buy CureLock as supply only, or as a complete concrete curing service. Our trained crews install the hessian, keep it wet for the full specified curing period (a minimum of 7 days for most structural concrete above 5°C), log every pour and hand over a signed curing record pack. That gives your engineer and client documented proof that the concrete was cured to specification.