The information contained in this Data Sheet is intended to assist you in designing with Rogers’ Elastomeric Material Solutions.
It is not intended to and does not create any warranties, express or implied, including any warranty of merchantability or
fitness for a particular purpose or that the results shown in this Data Sheet will be achieved by a user for a particular purpose.
The user should determine the suitability of Rogers BISCO products for each application. The Rogers logo, BISCO, and the BISCO
logo are trademarks of Rogers Corporation or one of its subsidiaries. © 2022 Rogers Corporation. All rights reserved. 0522-PDF •
Publication #180-389 www.rogerscorp.com
Product Data Sheet
BISCO® RS-870 Soft
BISCO® RS-870 Soft silicone sponge embodies the
transition in the BISCO Silicone Cellular series from soft
and conformable to firm and durable. It simultaneously
retains the lightness of a foam while exhibiting the
enhanced sealing capabilities of a traditional sponge
rubber. Patented chemistry and cell structure provide
long term performance advantage.
PROPERTY
TEST METHOD
TYPICAL VALUE* SPECIFICATION**
Pass
PHYSICAL
Color
Gray
Thickness, mm (
inches)
S
e
e
Standard Thickness
T
olerances
Table
Density, kg/m³ (lb./ft³)
256
(16)
34
(5)
13.8 - 48
(2- 7)
Compression Force Deflection, kPa (psi)
Visual
ASTM D1056
FLAMMABILITY
Temperature Range °C (°F)
Low Temperature Brittleness
Flame Resistance
Internal
- 55 to +200
(-67 to +392)
---
Meets at 3rd party lab
ASTM D746
Features & Benefits, applicable to all BISCO® Cellular Materials
---
2.4-12.7
(0.094-0.500)
192- 352
(12 - 22)
UL94
V-0 ; HF-1
Internal
Internal
Water Absorption, %
1.0
< 5
3.5
< 5
Compression Set, %
ASTM D1056
100°C (212°F) / 22 hrs / 50%
• Temperature independency
• UV/Ozone resistance
• Good compression set resistance
ASTM D1056
---
-55°C (-67°F) / 3 min
THERMAL
*Typical Value – Value is based on historical data, please note the frequency of testing varies.
**Specification- Applies to physical properties only, which are based on Rogers’ internal benchmark and standard BISCO specification
values. Specification values in bold are tested on a batch basis. All other
properties, flammability, thermal, etc, are based on industry
standard guidelines.
The information contained in this Data Sheet is intended to assist you in designing with Rogers’ Elastomeric Material Solutions.
It is not intended to and does not create any warranties, express or implied, including any warranty of merchantability or
fitness for a particular purpose or that the results shown in this Data Sheet will be achieved by a user for a particular purpose.
The user should determine the suitability of Rogers BISCO products for each application. The Rogers logo, BISCO, and the BISCO
logo are trademarks of Rogers Corporation or one of its subsidiaries. © 2022 Rogers Corporation. All rights reserved. 0522-PDF •
Publication #180-389 www.rogerscorp.com
Standard Thickness Tolerances
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
0% 10% 20% 30% 40% 50% 60% 70% 80%
PSI
Percent Compressed
RS-870
RS-870 0.125 RS-870 0.188 RS-870 0.250
NOMINAL THICKNESS TOLERANCE
mm (inches) mm (inches)
2.39
(0.094)
+/- 0.508
(+/- 0.020)
3.18
(0.125)
+/- 0.635
(+/- 0.025)
4.78
(0.188)
+/- 0.635
(+/- 0.025)
6.35
(0.250)
+/- 0.762
(+/- 0.030)
9.53
(0.375)
+/- 1.143
(+/- 0.045)
12.7
(0.500)
+/- 1.270
(+/- 0.050)