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Noise, anywhere it occurs it can distract, annoy or even lead to dangerous conditions. SCHLEGEL acoustical seals will make equipment quieter and help insure compliance with noise emission standards mandated by OSHA, VDE and others. Acoustical seals are made from a durable, flexible cladding and soft resilient foam in several profiles that create excellent barriers to noise.

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Characteristics

Resiliency: Schlegel acoustical seals will retain their shape due to their resistance to compression set.

  • Flexibility: Open-cell foam yields low compression forces which allow the seals to compensate for irregular mating surfaces. Because acoustical seals are easily compressed, covers and panels are not distorted when shut.
  • Durability: Tough, yet, flexible outer cladding is UV stabilized, resists abrasion and won't stiffen, shrink or detach from the foam core. Low coefficient of friction eases operation in sliding applications.
  • Stability: Outer film cladding on acoustical seals resists elongation and gives the seal tensil strength far greater than common unclad foam strips.

Specifications

  • Material Composition: Open-cell polyether polyurethane foam bonded to an outer covering of polyethylene or vinyl film. Film colors include black, white, bronze, beige and grey. Please contact Schlegel for availability of profile/color combinations.
  • Profiles: Custom profiles are a Schlegel's specialty. Send your drawing and requirements for evaluation by our design team.
  • Finishing: Processes include cut-to-length, die-cut, mitered or formed to finished shape. Pressure sensitive adhesive can be applied for surface mount applications. Adhesive strength (PSTC-1) is 5.0 lb/in for 180E peel on stainless steel (may vary, based on tape specified). Profiles with pressure sensitive tape should be applied to clean, dry surfaces at temperatures above 32°F (0°F). Recommended storage of taped products at 72°F (22.2°C), 50%RH.

Test Information

With SCHLEGEL acoustical seals, attenuation of 50dB+ is possible depending on the frequency, amount of compression and profile selected. The chart below show the acoustical attenuation performance of one of our most used profiles.

Results shown are typical of a urethane foam formulation. Some values may differ depending on profile size, shape and foam formulation.

  • Compression load deflection (ASTM D3574): at 25% compression 7.0± 2.4 lb/ft- (check metric) at 50% compression 12.0± 3.6 lb/ft (check metric)
  • Compression set (ASTM D3574): at 50% deflection 15% max at 78°F (25.6°C)
    25% max at 150°F (65.6°C)
  • Service temperature (ASTM D3574): -40°F to 122°F (-40°C to 50°C) in continuous service 158°F (70°C) short term
  • Low temperature flexibility Schlegel (LP 1312): -40°F (-40°C) no flex crackling