Rising damp occurs when the damp course, usually made of lead, plastic or slate, in a masonry wall no longer stops ground water and salts travel up the wall, causing unsightly damage to the interior and exterior finishes. The best solution is the reinstatement of a physical damp course. If this is not practical then a "chemical" damp course can be made. The injection of STAIN-PROOF^® 40SK Consolidator & Water Repellent, formerly known as DRY-TREAT 40SK™, below the floor level provides lasting protection against water and water-borne salt damage. How to use:

1. Determine the level of the existing damp course.

2. Drill below the old damp course 20 to 30-mm (3/4" to 1 1/4") diameter holes 120-mm (5") apart at a slight incline in a staggered pattern.

3. Ensure the holes to be treated are dry, clean and free of residues.

4. Apply when the surface temperature is below 35 C (95 F).

5. Generously saturate the holes with product using a reservoir, or similar. Avoid contact with surrounding areas (typical application rate is 1 litre per linear metres, depending on porosity and wall thickness).

6. Allow 30 minutes for product to soak in then repeat application until the wall is saturated.

7. Clean equipment in mineral turps.

8. After the successful completion of the damp coarse injection the walls will dry out, causing salts to appear at the surface.

The rate of drying out will depend on many things including the temperature and may take months before the moisture content of the wall is stable.