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  • Stops rising damp
  • Spillage and mess virtually eliminated
  • Consistent application rate
Dryzone Damp-Proofing Cream

Dryzone Damp-Proofing Cream

Launched in 2000, Dryzone Damp-Proofing Cream has caused a revolution in the treatment of rising damp.

The patented Dryzone System now outsells our traditional chemical injection damp-proofing treatments and is the best-selling rising damp treatment on the UK market.

Dryzone Benefits

Dryzone has a number advantages over conventional chemical injection damp-proofing systems for both the contractor and the householder:

  • Quick to install
    Up to 3 times faster than standard damp-proofing injection systems.
  • Simple to install
    Less scope for operator error
  • Concentrated formulation
    Eliminates the need to introduce large volumes of liquid carrier into the wall. Dryzone is over four times stronger than many competing products.
  • Low hazard
    Non-caustic, non-flammable, not injected under pressure.
  • Solvent-free formulation
    Does not contain white spirit or iso-paraffins.
  • Spillage & mess virtually eliminated
    No problems with damp-proofing fluid leaking into neighbouring rooms or properties.
  • No electric damp-proof course (DPC) pump required
    Can be used in situations where power is not available.
  • Effective
    Independent tests demonstrate that Dryzone provides a more effective barrier to rising damp than competing products.

Full instructions for installing Dryzone Damp-Proofing Cream can be found in the Dryzone datasheet which can be downloaded from this page. For those requiring more detail, a 19-page guide to "Rising Damp & its Control" can also be downloaded.

The Importance of Effective Damp-Proofing

  1. BBA Accreditation
  2. WTA Accreditation
  3. WTBC Accreditation
  4. OFI Accreditation
  5. Portsmouth University Accreditation
  6. ITB Accreditation
  7. EMI Accreditation

Naturally, homeowners want the most effective products available to be used to treat rising damp in their properties. Creating the best possible barrier to rising damp minimises moisture in the wall, blocks the build-up of ground salts, and reduces heat-loss. For this reason, Dryzone has been formulated to form an effective damp-proof course in walls of all types and has been tested under more conditions than any other rising damp treatment on the market.

This is important because no two walls suffering from rising damp are the same. In particular the physical properties of the mortar used to construct walls can vary considerably and this can have a significant influence on the effectiveness of any rising damp treatment.

The effectiveness of Dryzone has been verified under a wide range of test conditions by independent test houses around the world. Test conditions examined include:

  • Saturated walls (up to 95% saturation)
  • Low alkalinity mortar
  • High alkalinity mortar
  • Low porosity mortar
  • High porosity mortar
  • Lime-based mortar
  • Cement-based mortar

Comparative Test

An independent test report comparing the effectiveness of Dryzone with that of a competing low-strength damp-proofing cream can be downloaded free of charge in PDF format by clicking on the image to the right.

The report was carried out by the University of Portsmouth and published in February 2008.

Treating Walls of Varying Thicknesses With Dryzone

Drill hole depths for walls of various thicknesses

The depth of each drill hole required for various thicknesses of solid wall is shown in the table below. For all other types of wall, the depth of the hole should be to within 40 mm of the opposite face. In all cases the most effective target site is to drill horizontally directly into the mortar course, preferably at the top of all perpends of the selected course.

Wall Thickness
4½″ (115 mm) 9″ (230 mm) 13½″ (345 mm) 18″ (460 mm)
Depth of Drill Hole 95 mm 210 mm 325 mm 440 mm
Drill Hole Intervals 120 mm 120 mm 120 mm 120 mm

Dryzone Application

  1. Drilling holes in preparation for Dryzone Cream
    First create a series of horizontal drill holes along the mortar course. Typically these holes are 12 mm in diameter and drilled at 120 mm intervals - refer to the Dryzone Application Instructions for details for particular wall thicknesses.
  2. Insert Dryzone cartridge into applicator gun
    Insert a Dryzone cartridge into the applicator gun, ensuring the pressure piston is fully extended.
  3. Cut the Dryzone cartridge
    Cut into the end of the cartridge so that cream will be able to flow freely. Screw the nozzle cap back onto the gun.
  4. Dryzone Cream injection
    Fully insert the nozzle into the first drilled hole, and then inject Dryzone cream while withdrawing the nozzle at a steady rate. Stop injecting just before removing the nozzle from the wall. Repeat for remaining holes.

Once the Dryzone is installed, it diffuses before curing to form a water-repellent resin. This prevents the damp from rising up the wall.


As with all remedial damp-proofing systems, it is necessary to remove and replace any salt-contaminated plaster. The introduction of our hybrid plasterboard method, the Dryzone Express Replastering System has greatly simplified this process. See our page on replastering as part of a rising damp treatment for details of replastering systems available.

For heritage projects, or where replastering needs to be minimised Dryzone Renovation Plasters should be used.

Penetrating Damp

Dryzone is not suitable for application to walls as a treatment for penetrating damp. Dryzone's sister product, Stormdry Masonry Protection Cream should be used instead.

Suggested NBS specification clause: C45-30, C45-120

Visit our NBS page for further information on specifying Safeguard products using NBS.