Dust, loose particles and adhesives (oil, grease, etc.) must be removed from the substrate. Cracks must be scraped open and filled with suitable mortar. Once completed, the surface must be cleaned with a vacuum and a primer must be applied. The primer closes the pores of the substrate and reduces its water absorption. Additionally, the primer ensures good adhesion between the substrate and the applied layer.
The dispersion adhesive mira 4180 primer diluted with water is usually suitable for priming. The amount of water depends on the porosity of the substrate. On wooden surfaces, the 4180 primer concentrate is used to prevent excess water from entering the wood. On mineral surfaces, 4180 primer is diluted with water. The primer contains yellow pigment, which helps to visually identify primed and un-primed areas. The 4180 primer dries quickly and is suitable for use on both indoor and outdoor surfaces.
On non-porous substrates, such as old paint, stainless steel, glaze, polished surfaces, etc., it is best to use the two-component mira 4140 contact primer instead of an adhesive dispersion. The latter adheres very well to the substrate and creates a good contact surface for the next layer. In addition to general-purpose dispersion adhesives and contact primers, mira has a number of special purpose primers.
The mira 4400 multicoat waterproofing system includes mira 4410 vapourstop, which has a very high level of water vapour resistance. By applying the vapour barrier primer under the mira 4400 multicoat waterproofing membrane, we are able to increase the water vapour resistance of the waterproofing system by several times. This is very important in public washrooms and on wet walls against an external wall.
Before applying different shades of the fine-grained decorative plaster mira 6820 micro decor to the surface, the substrate must be primed with 4170 decor primer.
The miratherm façade system product family includes the special pigmented primer mira 5335 quartz grund, which is suitable for use in the miratherm façade system under decorative plasters, and is always tinted to match the shade of the plaster.