Surface Preparation Systems

Our high pressure surface preparation systems operate at pressures up to 3,000 bar without any abrasive additives. Using water eliminates the harmful and often damaging side effects produced by dry abrasive blasting such as airborne dust, chemical/thermal pollution and surface ingrained residual blasting materials. Waterjetting is the healthy, environmentally friendly method of surface preparation and industrial cleaning.

High Quality Surface Finish

Substrates prepared by our surface preparation systems meet the quality requirements set by international paint manufacturers and standards authorities for the application of new coatings. The water pressure necessary depends upon the condition of the existing surface layer(s), the type of coating to be applied and the substrate quality necessary for the successful application of that coating. The energy of the high velocity water jets blast into the pores in the metal surface flushing out solid foreign matter and non-water soluble pollutants such as oil and grease. Remaining chloride levels are at least five times lower than in a grit-blasted surface and the substrate profile remains intact ensuring good adhesion of the new coating and greatly reducing the risk of future paint film defects.

Water Filtration and Re-cycling

The amount of waste produced is far less than that produced by dry blasting. The waste water, old paint, marine growth and rust are easily collected for separation and disposal. Water can be treated for disposal or recycling. Talk with us to find out what water re-cycling options are available for your operations. Shrouding the work area is not necessary. Water will not harm nearby equipment and machinery as is often the case with the ingress of flying grit particles. Nor is there any unhealthy dust to distress yard personnel.

See the Dockmate in action – a surface preparation machine for large surface areas.

Our Surface Preparation Range

We have a range of surface preparation equipment to satisfy the varying industry requirements. Our surface preparation brochure provides an overview of our products and at the bottom of this page there are links to more detailed, product-specific brochures and videos. We manufacture the high pressure pump units and will ensure your surface prep pump is capable of your pressure and flow requirements. We provide full spares, service, and training & familiarisation support. To discuss your latest project requirements, please call one of our sales engineers on +44 1905 751790 or email

Find out how a customer reduced dry dock time for paint removal.

We are members of the Water Jetting Association (WJA). The WJA is a trade association representing contractors, manufacturers, hirers and other organisations in all aspects of high-pressure water jetting and has developed waterjetting codes of practice. Calder provides Water Jetting Association-approved training.

  • Pressures up to 3,000 bar.
  • Coverage up to 150m² per hour.
  • Working width up to 1000 mm.
  • Working height up to 32 metres.
  • Hand-held equipment or robotic.
  • Separation of waste solids.
  • Water recycling.
  • Vacuum and magnetic suction heads.