Dryzone Cream

Targeted Treatment of Rising Damp using the Dryzone System
 
Dryzone Damp-proofing Cream
 
Conventional Treatments
Since the 1950s the conventional method of treating Rising Damp has been to inject a silicone diluted in water or a hydrocarbon solvent into the wall. The silicone would cure inside the wall and block any further moisture rising from the ground. These systems have worked extremely well when correctly installed. However, they suffer from a number of problems:
  • Solvent-based systems are flammable and release harmful hydrocarbons into the atmosphere.
  • Water-based systems introduce large amounts of water into the wall, prolonging the drying-out period. Many water-based systems are also caustic.
  • Injecting liquids under pressure into walls can lead to party wall problems and can be difficult to justify under the COSSHH regulations.
  • Often difficult to gauge how much solution has been injected into each hole.
Dryzone Diffusion Treatment
It has been known for some time that DPC systems based on diffusion have better performance than pressure systems, but are awkward to handle. Current diffusion systems include:
  • Gravity Feed systems.
  • Frozen siliconate
  • Injection Mortars.
Dryzone Cream offers an effective, yet simple way of installing a DPC system with many benefits over existing systems:
  • Speed of use
  • Low cost of application equipment
  • Easy to see how much has been injected into each hole
  • Environmental – low toxicity, solvent-free, reduced packaging
  • Does not introduce large volumes of water into the masonry
  • No electricity required on site
How Does Dryzone work?
Dryzone uses the dampness within the masonry structure to disperse its active ingredients.
The process of events is as follows:
  • The Dryzone cream is introduced into a 12mm hole drilled into the mortar line.
  • The cream then slowly reverts to a liquid which is diffused into the surrounding masonry, particularly the mortar lines (the only continuous pathway in a masonry structure).
  • Once the Dryzone has diffused, it cures to form a water-repellent barrier, halting the Rising Damp
The range of the diffusion is greatly extended by Dryzone’s “vapour phase action” technology. As the Dryzone Cream diffuses, it releases a silane vapour which permeates the masonry beyond the penetration zone. This silane then reacts with silica structures within the masonry to form water-repellent resins.
 
  • Dryzone is the result of two years research at Safeguard’s in-house research and development laboratory. This work has involved the screening and testing of over 100 different potential formulations for stability and efficacy.
  • A paper on the development of Dryzone was presented to the 2000 BWPDA conference by our technical manager, David Payne. Copies are available on request.
 

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