Rusty Steel
The highly advanced formulation of Jenoseel actually uses rust, forming an inert long-lasting protective coating. Generally only loose rust and surface contaminants need to be removed before Jenoseel is applied. Proceed as follows:

1. Remove all scale and heavy rust by scraping, chipping or whatever technique is appropriate.

2. Scrape and wire-brush the surface to CST3 or DST3 SIS 055900. After the dust has been removed, the surface ‘peaks’, though rusty in appearance, should show  a ‘white’ metallic sheen.

3. Make sure there are no remaining traces of oily or greasy contaminants.

4. The surface must be clean and free of moisture and dust.

5. Apply the selected Jenoseel system.

New Steel
Jenoseel is highly effective on new steel, preventing rust from developing.

1. Remove all mill-scale, weld slag or other contaminants.

2. Proceed as ‘Rusty Steel’ above.

3. Apply the selected Jenoseel system. (If in doubt, apply a small check area, leave 24 hrs and then check.)

Chemical Contamination

Where this is suspected, follow this simple procedure:

1. Prepare surface as above.

2. Wash down all areas with copious amounts of clean water (high pressure is recommended) and allow to dry.

3. Apply the selected Jenoseel system, washing down and drying between coats if necessary.

Existing Paint
Jenoseel may be applied over most tightly adherent and aged paint systems except for those based on bitumen, pitch or chlorinated rubber. In these cases, spot priming alone may be satisfactory.

1. Thoroughly scrape and wire-brush to ensure the removal of all loose parts of previous treatments, at the same time thoroughly abrading the remainder, paying particular attention to unsound edges.

2. Then proceed as for Rusty Steel (above).

GENERAL NOTES
1. Shot-Blasting
Whilst shot-blasting is not generally necessary, Jenoseel primers may be applied over shot-blasted surfaces if desired. e.g., in heavily contaminated areas where shot-blasting may prove more convenient or economical.

SA2 (commercial) standard of finish is sufficient for the application of Jenoseel. Recent tests have shown that the coarse profile left by more rigorous shot-blasting actually reduces the adhesion of most coatings.

If wet-blasting, do not use inhibitors. Flash rusting is acceptable, but see Rusty Steel .

2. Galvanised Surfaces
The outstanding adhesion of Jenoseel enables easy application over weathered galvanised surfaces

Prepare as for Existing Paint, taking particular care to ensure that all loose galvanising is removed and to very thoroughly abrade the remainder. Wire brushing will not generally be sufficient.

3. Temperature and Humidity
Do not apply at a steel-surface temperature below 5°C on a falling thermometer or above 25°C on a rising thermometer.

Relative Humidity should not be above 90% and steel temperatures should be 2°C above the dew-point