Paul,
The chap doing my machining has given me some material data on materials that they machine for seals.

I'm wondering which would be best for a damper rubber.

Polyurethane -Shore 93 - temp -30#/=110# C
Hi Temp Nitrite -Shore85 --35#/+150# C
Silicone - Shore 85-temp-60#/=200# C
Thermoplastic Polyurethane -shore 85-temp-20/+110# C
Viton -shore85 - temp-20#/+200# C
Teflon -temp-200#/+260# C
Nitrite rubber -shore 85 temp-30#/+ 110# C
EPDM -shore 87- temp -50#/=130# C
Teflon filled grey - temp-200#/+260# C
Ecotal -temp-50#/+110# C
Nylon -temp-20#/+120# C

I'm thinking Silicone, what do you think about shore 85 hardness.
George (down under)

Your guess is as good as mine. Tracy tells me he keeps going softer and the
damper keeps working better. Not only is the shore important
the design of the damper bushing also enters into the equation.
The larger the diameter  it is the softer it is generally speaking.
Do you have a drawing? Silicone sounds good to me.
  
Paul Lamar
 
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