A high build, fast drying zinc phosphate primer suitable for iron and steel. Craftmaster Anti Corrosive Grey Primer has excellent scratch filling qualities and has good easy sanding qualities.

It's formulated for brushing, though also sprays very well with the addition of synthetic thinners.

Craftmaster anti corrosive grey primer is designed to adhere to bare steel and iron, without the prior use of etching primer, and provides a sound base for Craftmaster High Build Undercoat. Like most such primers, Grey Primer is porous and can absorb any atmospheric moisture. However it will release the moisture through evaporation. Therefore, before over coating, the material must be allowed to ‘breathe’ in an ambient temperature of at least 2 degrees above the dew point. This is entirely normal practice, and we are happy to provide (on request) a dew point calculator to assist in ensuring the correct environment.

If the substrate you are working on has been supplied in primer, we strongly recommend that the primer is removed and you start from bare metal to ensure a moisture free base for further paintwork that will be compatible with our products.

We do not recommend the rubbing down of Craftmaster Anti Corrosive Grey Primer. It dries open and as such is always ready to accept further coats of Anti Corrosive Grey Primer or High Build Undercoat.

We strongly recommend that you read the technical data sheet before applying paint.