Glue trim strips at points or over the entire surface and without swelling damage

Most of the moldings are made of styrofoam. The material is very light and can easily be glued on many substrates with adhesive without solvent. Spot or full-surface gluing is possible. The butt joints of adjacent end faces of adjacent decorative strips are not glued to prevent formation of tension.

As much as necessary and as little as possible

Molded polystyrene profiles can be bonded to almost any surface with solvent-free adhesives. Highly absorbent materials should be primed before and in addition. The biggest challenge is to achieve a good adhesive distribution without producing any swelling glue.

To optimize the dosage of the adhesive, the viscosity of the adhesive should be tested prior to attaching and fixing the trim strips. Each adhesive spreads when pressed between the surfaces meeting each other.

Check dosage on and on test pieces

On some short test pieces of the strip, for example from waste, the adhesive can be applied in different dosages. The types of application are:

  • Pea-sized sticky point about every ten centimeters
  • A centrally running adhesive strip with the diameter of a straw
  • Two parallel adhesive strips, each with the diameter of a match

After application of the adhesive, the test piece is pressed onto a colored paper, ideally blotting paper. At the edges next to the bar, wet surfaces are created when the glue comes out. With several passes, the appropriate amount of adhesive can be determined.

Be aware of background texture

When the moldings are applied to the ceiling and wall, the texture of the substrate does not always match the test paper. While wallpapers are comparable, with concrete and stone an even stronger distribution of the adhesive must be expected. In order to make the test of the dosage comparable with test pieces, a concrete block or a tile can be used instead of paper.

Tips & Tricks

To avoid the problem of viscosity and safely avoid over-swelling glue, you can use spray glue. It forms a thin film that distributes itself evenly on the back of the molding.

Product Image: VanoVasaio / Shutterstock

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