Tetrosyl Cellulose EP21 Grey Primer 5L - Grey

For primer surfacer, the recommended mix ratio is 1 part Tetrosyl Cellulose EP21 Grey Primer to 1 part thinner.

A flash-off time of 15 minutes is recommended between coats when spraying.

This primer is primarily designed for bare metal. Compatibility with plastics should be tested on a small, inconspicuous area first, as specialized plastic primers may be required.

'Hold-out' refers to the primer's ability to prevent the topcoat from soaking into it, which helps maintain the sheen and color consistency of the final finish.

The primer can be applied by HVLP or conventional spray guns. Specific tip sizes and pressure settings are recommended in the application section.

It can be air-dried in approximately 1 hour at 20°C, or low-baked for 15 minutes at 60°C metal temperature.

Spray equipment should be cleaned immediately after use with an appropriate thinner suitable for cellulose-based products.

Adjust the thinner ratio according to the recommended mixing ratios for Primer Surfacer or Primer Filler. Ensure the ambient temperature is within the recommended range for viscosity measurements.

Ensure the surface is clean, dry, and free from contaminants like grease, oil, or old paint. Prepare bare metal by degreasing and applying an appropriate etching primer if necessary.

Allow the primer to dry completely before sanding. Use appropriate grit sandpaper for the task and ensure your sanding technique is consistent.

This indicates poor 'hold-out'. Ensure adequate primer build has been achieved and that the primer is fully dry and properly sanded before applying the topcoat. Check that the correct primer is being used for the intended finish.