How to Apply Perlite Plaster?

Step-by-Step Application Guide

Perlite plaster is a lightweight type of plaster that provides thermal and sound insulation. When applied correctly, it both ensures energy savings and creates a long-lasting surface.

So, how is perlite plaster applied? Here is the step-by-step guide:

1. Surface Preparation

The surface must be prepared before application.

• The surface must be clean (free of dust, oil, and dirt)
• Loose particles must be removed
• Cracks and holes should be repaired
• The surface should be lightly moistened

The use of a primer is recommended for surfaces such as exposed concrete.

2. Mortar Preparation

Perlite plaster is prepared by mixing it with water.

Average mixture:

• 1 bag of plaster

• 9 – 12 liters of water

• Mix with a low-speed mixer

• Mix for 5 minutes – Let it rest for 2-3 minutes – Mix again

• A homogeneous consistency must be achieved.

3. Application

The prepared mortar is applied to the surface.

Application methods:

• Machine spraying

• Manual application with a trowel

• It is spread evenly on the surface

• It is leveled with a gauge (screed bar)

4. Application Thickness

• In a single coat: 10 – 30 mm
• A second coat can be applied if necessary