On Sat, 17 Dec 2005 20:31:08 GMT, "John R. Carroll"
wrote:

GD wrote:
Cliff wrote:
On Sat, 17 Dec 2005 07:30:48 -0500, GD wrote:

I'm am not sure what they use for the bushings that companies like
Energy Suspension use to make there's.
GD



Urethane.

There are a lot of them with widely varied properties ...
Most of the really good engineering ones seemed to be oven-cured
thermosets, many are susceptible to IR & UV radiation (even IR from
a space heater or steam heating system), some are hard, some soft,
all sorts of fillers ... some more abrasion resistant than others.
Some have UV &/or IR stabilizing agents, some fillers help too ...
Keep all moisture away from the plural components -- the resins
(polyols) may like to absorb water from the air but it reacts with the
isocynates in the other main component ... vacuum degas after
mixing if possible before pouring & don't splash air back in when
pouring ....

This assumes you want an engineering-grade non-foamed product,
among other things.
--
Cliff