Soft Silicone Sponge | Closed Cell | National Silicone

Soft density SPONGE

closed cell Silicone Sponge

This low compression set, soft density closed cell silicone sponge is ideal for demanding sealing and gasket applications. It is produced with a fabric finish on both sides, is flexible and can handle extreme temperature environments. Our soft silicone sponge offers excellent compression set resistance and can maintain its resiliency, even under extended compression.

Material details

Available in – Continuous rolls or cut sheets
Thickness available (in) – 1/16  to 1/2
Typical roll lengths (ft) – 25 to 100
Typical roll widths (in) – 36
Surface finishing – Fabric impression finish, both sides
Cell structure – Closed cell
Color – Red/orange, grey, black, others available

thickness TOLERANCES

1/16 Inch (1.6 mm) – 0.05″ (1.30 mm) min / 0.07″ (1.90 mm) max
3/32 Inch (2.4 mm) – 0.08″ (2.10 mm) min / 0.10″ (2.70 mm) max
1/8 Inch (3.2 mm) – 0.11″ (2.80 mm) min / 0.14″ (3.60 mm) max
3/16 Inch (4.8 mm) – 0.17″ (4.40 mm) min / 0.20″ (5.20 mm) max
1/4 Inch (6.4 mm) – 0.23″ (6.00 mm) min / 0.26″ (6.80 mm) max
3/8 Inch (9.5 mm) – 0.35″ (9.00 mm) min / 0.39″ (10.00 mm) max
1/2 Inch (12.7 mm) – 0.47″ (12.20 mm) min / 0.52″ (13.20 mm) max
* Tolerances are typical values obtained from sample testing

Material PROPERTIES

Properties
Compression deflection (25%) psi (kPa) 3-8 (21-55) ASTM D1056
Density < 0.25” thick pcf (kg/m3) 30 (475) max. ASTM D1056
Density ≥ 0.25” thick pcf (kg/m3) 27 (430) max. ASTM D1056
Compression set (22h, 100°C) % 4 ASTM D1056
Tensile strength psi (kPa) 41 (283) ASTM D412

Full Datasheet

For Sales

Email: sales@nationalsilicone.com
Phone: 888-814-6599
or
Contact: Brian Lindley
Phone: 714-203-4780
Email: brian.lindley@nationalsilicone.com