SILICONE RUBBER
SELECTION GUIDE


Schwerdtle's proprietary line of silicone rubber compounds is designed to transfer sharp images over a wide range of hot stamping applications. This guide will help you select the best silicone rubber compound for your particular job. If you need assistance, please call our customer service people toll free: 1-800-535-0004.

TYPE OF DECORATION/ARTWORK

DESCRIPTION OF PLASTIC PART
AND SURFACE TO BE STAMPED

SILICONE RUBBER COMPOUND
SERIES - DUROMETER

Vertical stamping
fine detail or small lettering

Parts are consistent and smooth (free of sinks and irregularities); flat or contoured

"C" - 85, 95

Vertical stamping
fine detail or small lettering

Parts are inconsistent and/or have slight surface sinks and/or irregularities; flat or contoured

Dual Durometer
C-95 face / A60 backing

Vertical stamping
heavy detail or bold lettering

Parts are consistent and smooth (free of sinks and irregularities); flat or contoured

"A" - 70, 80

Vertical stamping
heavy detail or bold lettering

Parts are inconsistent and/or have slight surface sinks and/or irregularities; flat or contoured

"A" - 70, 80, 90

Vertical stamping
heavy detail or bold lettering
combined with fine detail/lettering
in same decoration

Please send sample parts and
artwork for our evaluation

We will make recommendation
after evaluation.

Roll marking with flat die on cylindrical
parts (chain drive peripheral tube stamping)

Parts are consistent and smooth;
cylindrical parts

"C" - 85, 95

Roll marking with flat die on cylindrical
parts (chain drive peripheral tube stamping)

Parts are inconsistent and/or have slight surface sinks and/or irregularities; cylindrical parts

"A" - 80
- or -
Dual Durometer C-95 face / A-60 backing

Thermal Transfers (decals)

Please send sample parts and
information on type of transfers,
and hot stamping press.

We will make recommendation
after evaluation.
Usually "B" - 60, 80

Tip stamping raised letters,
designs or lines

Parts are consistent and smooth

"R" - 60, 70, 80

Roll stamping heat transfer decals
or patterned foil

Flat surfaces or contoured extrusions

"R" - 60, 70



SILICONE RUBBER PROPERTIES RATING GUIDE

 

(Ratings are from 1 to 4; 1 is the highest, 4 is the lowest)

SCHWERDTLE
COMPOUND SERIES

DUROMETER

THERMAL
CONDUCTIVITY

THERMAL
STABILITY

RESILIENCE

TOUGHNESS

"A"
STANDARD
RED

40
50
60
70
80

4
3
2
2
2

2
2
2
2
2

1
1
2
3

1
1
2
2
2

"B"
HI-CONDUCTIVE
BROWN

60
80

1
1

2
2

2
3
 

3
3

"C"
HI-TEMPERATURE
BROWN

85
95

2
2
 

1
1

3
3

3
3
 

"R"
HI-TEAR STRENGTH
RED

60
70
80

4
3
3

3
3
3

1
1
2

1
1
2

 

DEFINITIONS:
DUROMETER: Hardness of rubber.
THERMAL CONDUCTIVITY: Ability of rubber to conduct heat; permits faster production rates and/or lower operating temperature at press.
THERMAL STABILITY: Ability of rubber to withstand heat without breaking down.
RESILIENCE: Ability of rubber to resist taking a set.
TOUGHNESS: Tear strength; resistance to chipping, cracking, breaking.



Schwerdtle Incorporated
168 Elm St. • PO Box 1461 • Bridgeport, CT 06604 • (203) 330-2750
(888) 242-3698 • Fax: (203) 330-2760
E-mail (Sales): sales@schwerdtle.com
E-mail (Art Department): art@schwerdtle.com