High-Density Foam

Supportive Structure for Custom Cushions

Our high-density upholstery foam is selected for custom cushions that need reliable support, clean shape, and everyday comfort. With a 28 ± 1 kg/m³ density, this foam offers a balanced medium-firm feel, making it a strong choice for both indoor and outdoor cushion use when paired with the right fabric cover.

Its supportive structure helps the cushion keep a tailored appearance over time. Compared with softer, lower-quality foam that can flatten quickly, this foam provides a more stable seating surface, cleaner cushion edges, and better shape retention for daily use. The result is a cushion that feels supportive, looks polished, and holds its form beautifully inside the cover.

For indoor use, it works well with upholstery fabrics in dining benches, window seats, kitchen nooks, bar stools, built-in benches, sofa seating, and everyday home seating areas. For outdoor use, it pairs with durable outdoor fabric covers for patio cushions, porch benches, outdoor dining chairs, lounge cushions, and other covered or protected outdoor seating areas.

High-Density Foam High-Density Foam

Technical Details

  • Foam type: High-density upholstery foam
  • Density: 28 ± 1 kg/m³
  • Approx. density in US measurement: 1.75 PCF
  • Feel: Medium-firm, supportive, structured
  • SAG factor: ≥ 2
  • Resilience / rebound: ≥ 35%
  • Hardness: 210–260 N
  • Tensile strength: ≥ 110 kPa
  • Elongation at break: ≥ 100%
  • Tear strength: ≥ 3 N/cm
  • Compression deformation — hardness: ≤ 30%
  • Compression deformation — thickness: ≤ 5%
  • Recommended use: Indoor and outdoor cushion use when paired with the appropriate fabric cover
Why It Works
This foam is a strong choice when you want a cushion with visible structure, supportive comfort, and a clean made-to-measure finish. It helps create crisp cushion edges, a fuller appearance, and a stable seating surface for cushions used every day.
Best For
Seat cushions, bench cushions, dining chair cushions, window seats, patio cushions, sofa seats, ottomans, bar stool cushions, and custom indoor or outdoor cushion projects.