Applying HydroPrimer

Introduction to Hydroprimer

For porous microcements like MicroDur, the surface must be prepared with 2 coats HydroPrimer before applying the final sealer coats of Aquamax Pro or Maxipur.

HydroPrimer is a single component product which is applied in 2 coats: 1 diluted with water, followed by a neat coat.

Apply Diluted Coat HydroPrimer

Once the final coat of microcement has been applied, it must be left until it is completely dry, this will take a minimum of 24 hours, but will depend on the conditions.

Once dry, the microcement surface is very absorbent.

Hydroprimer is a pre-sealer that will start to make the surface waterproof so that it is less absorbent when the Polyurethane is applied, allowing them to be applied more easily, reducing the chance of getting visible dry lines in the surface.

Dilute half of the Hydroprimer with 50% water. You will need around 500ml Hydroprimer + 500ml water per 10m2.

Use a medium pile roller to apply the diluted coat of HydroPrimer ensuring it is completely and evenly saturated.

Saturate an area and then go back over it with the roller to iron out lines and remove any excess product.

Work quickly & randomly, keeping the edge wet.

Leave to Dry

This should take around 1 hours but may vary depending on temperature and ventilation.

Apply Neat Coat Hydroprimer

Apply a neat coat of Hydroprimer in the same way that you applied the 1st coat.

Ensure you cover the full area with both coats of Hydroprimer and use the full amount provided (1l per 10m2) across the 2 coats.

Leave to Dry

Leave the neat coat of Hydroprimer to dry fully before applying the sealer coat. This should take around 3 hours but may vary depending on temperature and ventilation.