Mastic waterproofing: Overview

Mastic sealing is performed on surfaces exposed to direct moisture, such as: swimming pools, basements and exterior surfaces, etc. Specified condition - required, despite the fact that many of the materials used matichnyh vapor permeability. On the surface, having a negative pressure of water vapor such materials do not apply. Although there are exceptions, such as samonagruzhennyh layers mastic insulation - insulation under screed or plaster.

Most cements consist of the following components: a polymer binder, mineral fillers, including pigments, "volatile" component (solvent) and addetivy - Supplements governing properties such as rheology of pastes, the environment, the ability to fast air release, preventing the formation of surface defects, etc for two-component sealant of the second component is generally composed of curing agent and (or) the catalyst, part of the bat and maybe some addetivy.

Technology of applying mastic material similar to painting: materials of low and medium viscosity are applied by brush, roller or mechanically plated, high-viscosity materials are applied with a trowel, spatula or special devices for airless spraying.

Importantly, what to look for work mastic material is surface preparation and application of primer layers (see instructions for surface preparation).

There are many different mastic material we consider basic, classifying them by chemical-based binder:

  • Bituminous mastic materials
  • One-component polyurethane mastic
  • Two-component polyurethane mastic
  • Epoxy compositions
  • Aqueous dispersions of copolymers, butadiene-styrene, acrylate (methacrylate), etc.
  • Tiokolovye
  • Siloxane
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