ROCKBOND UNDERWATER SCOUR PACK (RB UWSP) powder is a premixed, dry mixed cementitious concrete powder specially formulated for underwater non flow void filling applications. The compound contains a blend of cement powders, high quality graded crushed rock sands and aggregates and a union of admixtures. The powder is packed in hessian bags contained in a waterproof outer woven polypropylene sack. When the outer sack is removed and the hessian bag placed underwater, water penetrates the concrete powder and hydrates the cements to produce a non flow, fully compacted, abrasion resistant in situ concrete. The pack is used to fill underwater voids and cavities in concrete, brick and stone and to support and protect structures from scour, erosion and mechanical attack. The packs contain 25kg of powder, are waterproof and durable and have a shelf life of 5 years.

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