Crack & Leak Repair

We have extensive knowledge and experience in the application of underwater concrete repair. High strength cementitious grouts, injected non-shrink polyurethane grout and and specialized epoxy coatings are just some of the products that we use in concrete repair.  Products are NSF and/or SIKA certified. 

 

Directed by engineers, our projects range from sealing of old pipes, joints, cracks, fractures and holes in concrete to the repair of potable water tanks.  

 

Our engineers work with clients to select the proper material for each application whether it be a potable water application or concrete and steel remediation. Our success is unmatched.

 

Superior performance in any underwater environment.

Subac is a high-strength, easy-to-mix, cement-based concrete and masonry patching compound designed specifically for placement in tidal zones and underwater applications.  Subac will set and form a permanent bond to virtually any underwater surface. It is resistant to chemical attack, freezing and thawing, and can be used in all types of water.  Divers prefer Subac because, unlike other underwater cements, Subac does not separate or “smoke” in water, making it easy to apply under virtually any conditions, providing divers with maximum visibility to complete their work.

 

Subac has been successful in the following applications:

  • Remediation

  • Bridge Foundations

  • Erosion Control

  • Structural Restoration

  • Stone Pointing

  • Leaking Cofferdams

  • Cracked Retaining Walls

  • Footing

  • Nuclear/Hydro Power Plants

  • Marine Worm Protection

  • Pipe Line Repair

  • Flood Gate Rehabilitation

  • Pier Construction / Pile Capping

  • Bulkheads

  • Anchoring

  • Seawalls

At DSI, we use NSF 61 Certified products.  

 

Mountain Grout has been used in potable water applications throughout the world. Mountain Grout helps to stop below grade water intrusion. The materials are pumped into the leaking area forming a waterproof barrier thus providing a permanent repair.

 

In a potable water clearwell, in New Bedford, MA we used Mountain Grout to seal over 30' of leaking along the tank's expansion joint.  P.E. divers determined the leakage area with a series of dye tests along the expansion joint.  After the area of concern is located the engineers decide the proper injection locations, depth and angles along the expansion joint.  The holes are then drilled and the injection ports installed.  The grout is mixed by a topside crew and pumped to the diver who connects the hose to each injection port along the expansion joint. As the grout expands it seals the leak.