What is the best way to glue styrofoam sheets

Products that do not contain solvents can be used as adhesives for Styrofoam. Water-based dispersion adhesives, acrylates and polyurethanes are the most common adhesives. What the connection holds best with is decided by the subsurface. In general, a distinction can be made between absorbent and non-absorbent surfaces.

Adhesive substrates

If you glue Styrofoam sheets to a ceiling or wall, you choose the adhesive based on the nature of the surface. There are three main types of adhesives, each of which can be used on multiple materials.

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The suction behavior of the adhesive surface is decisive. The absorbent materials include:

  • concrete
  • Plasterboard
  • Wood
  • Plaster
  • Natural stone (tiles)

The non-absorbent substrates include:

  • Glass
  • Ceramic tiles
  • Metals
  • Plastic-coated multi-purpose panels such as OSB

Three common types of adhesive cover every need

Polyurethane foam

The plastic adhesive foam can be used with almost any combination of materials. The many setting options offered by the manufacturer allow specific variants to be selected for absorbent and non-absorbent surfaces.

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Acrylates and epoxies

Acrylic and resin adhesives are the best choice, especially on smooth, non-absorbent surfaces. Their greatest advantage is their UV resistance and very long service life. You need a supply of air to be able to cure. When buying, attention should be paid to the adhesive function focused on by the manufacturer. Systems with two components are usually overdosed in terms of adhesive strength.

Water-based dispersion adhesives

The easy-to-use, water-based dispersion adhesives are ideal for smooth, non-absorbent surfaces, particularly indoors. However, you need air access to harden, as the water dissolved in the paint must be able to evaporate. They are also available in sprayable form under the name aerosols.

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When gluing with air-dependent adhesives, cladding, sealing and plastering should only be carried out after it has dried out. Tile and cement adhesives should not be used for fastening and laying styrofoam sheets.

Even if some relevant portals recommend hot glue as an alternative to attaching Styrofoam sheets, this variant is actually excluded. Styrofoam is sensitive to heat and can deform when insulation is glued.

Tips & Tricks If you glue Styrofoam to Styrofoam, besides specific Styrofoam adhesives, common wood glue (€ 6.49 at Amazon *) is a functional and inexpensive alternative.