Polyurethane foam is softer and compresses more than PE foam. That is what lets it take up a flatness defect and bond to irregular surfaces, where a thin tape would only touch the high points.
The 3 references in the catalogue
- 3M 4026 and 3M 4032, PU foam tapes.
- Norbond V2800, from Saint-Gobain Tape Solutions.
See also our double-sided tapes, our PE foams and our acrylic foams.
PU, PE or acrylic
PU foam is soft and conformable. It follows an irregular substrate and cushions, but it tears more easily and ages less well outdoors.
PE foam is closed-cell, stiff and watertight. It is economical but compresses little.
Acrylic foam is viscoelastic: it is the only one of the three suited to a lasting structural bond under vibration or outdoors.
The rule: PU to take up a surface, PE to shim and seal, acrylic to hold.
Its most frequent use
Mounting trims, signs, profiles and light parts on substrates that are not perfectly flat. The softness of the foam compensates for what preparation cannot correct.
Application
Clean, dry and degreased surface, real pressing down, and application above about fifteen degrees. As with all adhesive foams, strength keeps rising during the hours after application.
A question before ordering?
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