Polyurethane Foam

PORON® Soft Seal 4701-15 Series

The PORON® 4701-15 Soft Seal Series features the lowest-density formulation in the PORON lineup, offering superior dust sealing and cushioning performance at just 6.5 lb/ft³ (104 kg/m³). Designed for thin, lightweight applications, this microcellular polyurethane provides enhanced surface toughness and reliable protection in compact form factors.

Features

  • Ultra-low density (6.5 lb/ft³ / 104 kg/m³) – excellent for lightweight sealing needs.
  • Thin profiles – available in 0.53 mm, 0.75 mm, and 1.00 mm (±0.10 mm tolerance).
  • Enhanced surface toughness – improves yields during die cutting and handling.
  • Strong compressibility and conformability – adapts to surface irregularities easily.
  • Supported with polyester film (PET) for added handling ease (typical for thinner formats).

Benefits

  • Delivers long-term dust sealing and cushioning, even in minimal thicknesses.
  • Offers exceptional conformability for precise sealing in tight or intricate designs.
  • Easy to process—thin, durable design supports efficient die-cut workflows.
  • Maintains protective properties in lightweight, compact assemblies.

Applications

  • Cushioning and dust sealing in thin electronic displays and enclosures
  • Gasketing for LCD glass or optical components
  • Shock absorption and gap filling in compact mechanical parts
  • Sound-blocking and vibration control in thin-profile designs

Why Choose PORON® 4701-15 Soft Seal?

  • Lightweight and thin—perfect for ultra-compact designs needing dependable sealing.
  • Soft and conformable—an ideal solution for sealing delicate or uneven surfaces.
  • Built tough—enhanced surface durability ensures clean processing and long life.
  • Material-ready format—supported options simplify handling and fabrication in production lines.

Data Sheets

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