Kem-Kromik M255 (formerly known as Sherwin-Williams M255 or Leighs M255) is a single pack quick drying acrylic modified alkyd anti-corrosive protective finish, used as a single coat shop applied protective finish for structural steel that will not normally require further site coats. Suitable for use as a single coat system on internal or external steel, applying by airless spray and using a brush only for small areas or touching up.

Recommended Primers/Topcoats

Not normally required but may be overcoated with a wide range of materials. Please refer to our technical team for additional information.

Surface Preparation

Blast clean to Sa2½ BS EN ISO 8501-1:2007. Average surface profi le in the range 50-75 microns. Ensure surfaces to be coated are clean, dry and free from all surface contamination.

Typical Thickness and Coverage

Dry film thickness

100 microns

Wet film thickness

185 microns

Theoretical coverage

5.4 m² /ltr*

*This figure makes no allowance for surface profile, uneven application, overspray or losses in containers and equipment. Film thickness will vary depending on actual use and specification.

Practical Application Rates

Microns per coat

* Maximum sag tolerance typically 231μm wet (125μm dry) by airless spray

Average Drying Times

These figures are given as a guide only. Factors such as air movement and humidity must also be considered.