What material can I pour into a 1" x 1" x 1" mold (a cube without a lid) that
will solidify into a rubber-type consistency? I need to make a part for a
microphone that has not been manufactured in 50 years. It would be best if the
material did not harden like acrylic. However, I'd use that as a last resort if
I knew where to get it.

I've never done this sort of thing, so I have no idea what material to try to
find or where to search for it. Since I only need a small amount, a suggestion
for a material that is only available from a wholesale-only industrial supply
house would be hard to follow.

Is there some sort of silicone that meets this requirement? Is there such a
thing as liquid rubber? Here's hoping!

On Apr 29, 1:15*pm, mcp6453 wrote:
What material can I pour into a 1" x 1" x 1" mold (a cube without a lid) that
will solidify into a rubber-type consistency? I need to make a part for a
microphone that has not been manufactured in 50 years. It would be best if the
material did not harden like acrylic. However, I'd use that as a last resort if
I knew where to get it.

I've never done this sort of thing, so I have no idea what material to try to
find or where to search for it. Since I only need a small amount, a suggestion
for a material that is only available from a wholesale-only industrial supply
house would be hard to follow.

Is there some sort of silicone that meets this requirement? Is there such a
thing as liquid rubber? Here's hoping!

Use ordinary silicone rubber, build it up in layers or just fill the
whole thing up at one time and wait a few days.

On 4/29/2013 2:15 PM, mcp6453 wrote:
What material can I pour into a 1" x 1" x 1" mold (a cube without a lid) that
will solidify into a rubber-type consistency? I need to make a part for a
microphone that has not been manufactured in 50 years. It would be best if the
material did not harden like acrylic. However, I'd use that as a last resort if
I knew where to get it.

I've never done this sort of thing, so I have no idea what material to try to
find or where to search for it. Since I only need a small amount, a suggestion
for a material that is only available from a wholesale-only industrial supply
house would be hard to follow.

Is there some sort of silicone that meets this requirement? Is there such a
thing as liquid rubber? Here's hoping!


Silicon RTV adhesive or caulk would cure eventually but an inch is a
little thick.

On the outdoor channel the other day I saw a guy having ear fitting ear
plugs made by having liquid rubber injected from a syringe right in his
ear so there is such an animal.

This mold builder stuff might work with enough coats:

http://www.micromark.com/liquid-rubb...l-oz,7472.html

On Mon, 29 Apr 2013 14:15:16 -0400, mcp6453 wrote:

What material can I pour into a 1" x 1" x 1" mold (a cube without a lid) that
will solidify into a rubber-type consistency? I need to make a part for a
microphone that has not been manufactured in 50 years. It would be best if the
material did not harden like acrylic. However, I'd use that as a last resort if
I knew where to get it.

I've never done this sort of thing, so I have no idea what material to try to
find or where to search for it. Since I only need a small amount, a suggestion
for a material that is only available from a wholesale-only industrial supply
house would be hard to follow.

Is there some sort of silicone that meets this requirement? Is there such a
thing as liquid rubber? Here's hoping!

I think silicone caulk would do it in about 3 days. [for about $5]

G-flex epoxy would give you more of a polyethylene plastic in about 5
minutes- for $20 or so from a boat store.

I'd give Devcon a call and see if they have a rubber 5 minute epoxy.

Jim

replying to mcp6453 , DA wrote:
mcp6453 wrote:

What material can I pour into a 1" x 1" x 1" mold (a cube without
a lid) that
will solidify into a rubber-type consistency? I need to make a part for a
microphone that has not been manufactured in 50 years. It would be best if
the
material did not harden like acrylic. However, I'd use that as a last
resort if
I knew where to get it.

Tin-cure RTV silicon rubber sounds like the best material for this. Noone
(I know) sells such small amounts for a 1" cube and besides, it will be
really difficult to properly measure 10:1 ratio of components if you only
need 1cu.inch. It is sensitive to proper component ratios. 1 cu. inch is
usually more than I have leftovers after a mold is poured - this could
have been easily done from someone's leftovers if you can find a sculptor
or a builder or another specialist, artist or hobbyist in your area
working with RTV molds.

Smooth-On sells very nice RTV silicons. I use mostly MoldMax 30 but it's
pink - do you care what color it is? MoldMax40 is light green, and they
also have translucent versions of all of these. Here is the page at their
site about the silicones:
http://www.smooth-on.com/Silicone-Ru...135/index.html

They do sell online, including trial size packages for about $25 but at
2.2 lbs it is still more than you need if you only need one of these
cubes. Arts and crafts stores like Michaels also sell similar silicones (I
think they are similar) but they are about 4 times the cost per weight
unit, so I've never bought from a craft store, can't vouch for their
quality or workability.

I guess for a small cube any RTV you can get your hands on will do, but
for any serious work I'd use Smooth-on product.


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Jim Elbrecht wrote:

On Mon, 29 Apr 2013 14:15:16 -0400, mcp6453 wrote:

What material can I pour into a 1" x 1" x 1" mold (a cube without a lid) that
will solidify into a rubber-type consistency? I need to make a part for a
microphone that has not been manufactured in 50 years. It would be best if the
material did not harden like acrylic. However, I'd use that as a last resort if
I knew where to get it.

I've never done this sort of thing, so I have no idea what material to try to
find or where to search for it. Since I only need a small amount, a suggestion
for a material that is only available from a wholesale-only industrial supply
house would be hard to follow.

Is there some sort of silicone that meets this requirement? Is there such a
thing as liquid rubber? Here's hoping!

I think silicone caulk would do it in about 3 days. [for about $5]

G-flex epoxy would give you more of a polyethylene plastic in about 5
minutes- for $20 or so from a boat store.

I'd give Devcon a call and see if they have a rubber 5 minute epoxy.

Jim

If the part is to be greater than 1/4" thick, regular silicone caulk
will not work since it will not cure properly. For thicker parts a
catalyzed silicone material is required. Look at McMaster.com for
various castable silicones, urethanes and the like.

On 4/29/2013 11:15 AM, mcp6453 wrote:
What material can I pour into a 1" x 1" x 1" mold (a cube without a lid) that
will solidify into a rubber-type consistency? I need to make a part for a
microphone that has not been manufactured in 50 years. It would be best if the
material did not harden like acrylic. However, I'd use that as a last resort if
I knew where to get it.

I've never done this sort of thing, so I have no idea what material to try to
find or where to search for it. Since I only need a small amount, a suggestion
for a material that is only available from a wholesale-only industrial supply
house would be hard to follow.

Is there some sort of silicone that meets this requirement? Is there such a
thing as liquid rubber? Here's hoping!


there are many products that can be used. see

http://www.smooth-on.com/

i think hobby shops like michaels sells a 2 part curable silicone
product that would do this.

On 4/29/2013 3:49 PM, chaniarts wrote:
On 4/29/2013 11:15 AM, mcp6453 wrote:
What material can I pour into a 1" x 1" x 1" mold (a cube without a lid) that
will solidify into a rubber-type consistency? I need to make a part for a
microphone that has not been manufactured in 50 years. It would be best if the
material did not harden like acrylic. However, I'd use that as a last resort if
I knew where to get it.

I've never done this sort of thing, so I have no idea what material to try to
find or where to search for it. Since I only need a small amount, a suggestion
for a material that is only available from a wholesale-only industrial supply
house would be hard to follow.

Is there some sort of silicone that meets this requirement? Is there such a
thing as liquid rubber? Here's hoping!


there are many products that can be used. see

http://www.smooth-on.com/

i think hobby shops like michaels sells a 2 part curable silicone product that
would do this.


The smooth-on site looks like it may have a solution. There are some videos and
helper guides there. Thanks everyone for the information.

"Pete C." wrote:


Jim Elbrecht wrote:

-snip-

I think silicone caulk would do it in about 3 days. [for about $5]

G-flex epoxy would give you more of a polyethylene plastic in about 5
minutes- for $20 or so from a boat store.

I'd give Devcon a call and see if they have a rubber 5 minute epoxy.

Jim

If the part is to be greater than 1/4" thick, regular silicone caulk
will not work since it will not cure properly.

After I found a tube of it solidified I played around with thicker
'pours'. An inch thick takes a couple weeks-- but 1/3 is close over
night-- then another third-- and another.

For thicker parts a
catalyzed silicone material is required. Look at McMaster.com for
various castable silicones, urethanes and the like.

I'll second the plug for mcmaster.com - though I haven't used any.

Jim

mcp6453 wrote:
What material can I pour into a 1" x 1" x 1" mold (a cube without a lid) that
will solidify into a rubber-type consistency? I need to make a part for a
microphone that has not been manufactured in 50 years. It would be best if the
material did not harden like acrylic. However, I'd use that as a last resort if
I knew where to get it.

I've never done this sort of thing, so I have no idea what material to try to
find or where to search for it. Since I only need a small amount, a suggestion
for a material that is only available from a wholesale-only industrial supply
house would be hard to follow.

Is there some sort of silicone that meets this requirement? Is there such a
thing as liquid rubber? Here's hoping!

I use to use silastic products, but costly.

You might try dynaflex 230 into a cube if silicone rtv does not work. I
don't know how 230 will set up in a cube, worth a try. Heat it up for a
couple days. Rtv should also set up with heat and time. It used to be easy
to buy the runny stuff for windshields, but I have not seen it lately.

Greg

On 4/29/2013 6:19 PM, gregz wrote:
wrote:
What material can I pour into a 1" x 1" x 1" mold (a cube without a lid) that
will solidify into a rubber-type consistency? I need to make a part for a
microphone that has not been manufactured in 50 years. It would be best if the
material did not harden like acrylic. However, I'd use that as a last resort if
I knew where to get it.

I've never done this sort of thing, so I have no idea what material to try to
find or where to search for it. Since I only need a small amount, a suggestion
for a material that is only available from a wholesale-only industrial supply
house would be hard to follow.

Is there some sort of silicone that meets this requirement? Is there such a
thing as liquid rubber? Here's hoping!

I use to use silastic products, but costly.

You might try dynaflex 230 into a cube if silicone rtv does not work. I
don't know how 230 will set up in a cube, worth a try. Heat it up for a
couple days. Rtv should also set up with heat and time. It used to be easy
to buy the runny stuff for windshields, but I have not seen it lately.

Greg

Does it have to be all rubber?
Can you mold most of it out of Sculpy and use sheet rubber for the springy
part?

There's stuff called "Great Stuff" that's used for plugging up
air infiltration in buildings.

The cheap stuff gets pretty hard. The more expensive version
stays spongy.
Can get it at Home Depot.
Don't know if it has the mechanical strength for your application.

mcp6453 wrote:
On 4/29/2013 3:49 PM, chaniarts wrote:
On 4/29/2013 11:15 AM, mcp6453 wrote:
What material can I pour into a 1" x 1" x 1" mold (a cube without a lid) that
will solidify into a rubber-type consistency? I need to make a part for a
microphone that has not been manufactured in 50 years. It would be best if the
material did not harden like acrylic. However, I'd use that as a last resort if
I knew where to get it.

I've never done this sort of thing, so I have no idea what material to try to
find or where to search for it. Since I only need a small amount, a suggestion
for a material that is only available from a wholesale-only industrial supply
house would be hard to follow.

Is there some sort of silicone that meets this requirement? Is there such a
thing as liquid rubber? Here's hoping!


there are many products that can be used. see

http://www.smooth-on.com/

i think hobby shops like michaels sells a 2 part curable silicone product that
would do this.


The smooth-on site looks like it may have a solution. There are some videos and
helper guides there. Thanks everyone for the information.

I found the trial size costs about $25 . Mold max 10 looks like plenty of
goo for 1 inch square.

What I have used is sylgard.

http://www.ebay.com/itm/NEW-Dow-Corn...em2a2943 afd7

Greg

Greg

mike wrote:
On 4/29/2013 6:19 PM, gregz wrote:
wrote:
What material can I pour into a 1" x 1" x 1" mold (a cube without a lid) that
will solidify into a rubber-type consistency? I need to make a part for a
microphone that has not been manufactured in 50 years. It would be best if the
material did not harden like acrylic. However, I'd use that as a last resort if
I knew where to get it.

I've never done this sort of thing, so I have no idea what material to try to
find or where to search for it. Since I only need a small amount, a suggestion
for a material that is only available from a wholesale-only industrial supply
house would be hard to follow.

Is there some sort of silicone that meets this requirement? Is there such a
thing as liquid rubber? Here's hoping!

I use to use silastic products, but costly.

You might try dynaflex 230 into a cube if silicone rtv does not work. I
don't know how 230 will set up in a cube, worth a try. Heat it up for a
couple days. Rtv should also set up with heat and time. It used to be easy
to buy the runny stuff for windshields, but I have not seen it lately.

Greg

Does it have to be all rubber?
Can you mold most of it out of Sculpy and use sheet rubber for the springy
part?

There's stuff called "Great Stuff" that's used for plugging up
air infiltration in buildings.

The cheap stuff gets pretty hard. The more expensive version
stays spongy.
Can get it at Home Depot.
Don't know if it has the mechanical strength for your application.

The water based stuff is pretty spongy and porus.

Greg

On 04/29/2013 11:15 AM, mcp6453 wrote:
What material can I pour into a 1" x 1" x 1" mold (a cube without a lid) that
will solidify into a rubber-type consistency? I need to make a part for a
microphone that has not been manufactured in 50 years. It would be best if the
material did not harden like acrylic. However, I'd use that as a last resort if
I knew where to get it.

I've never done this sort of thing, so I have no idea what material to try to
find or where to search for it. Since I only need a small amount, a suggestion
for a material that is only available from a wholesale-only industrial supply
house would be hard to follow.

Is there some sort of silicone that meets this requirement? Is there such a
thing as liquid rubber? Here's hoping!

Might think about plasti-dip, possibly pouring it in layers to help it
set up faster. It's pretty cheap, too.

Jon

replying to gregz , DA wrote:
zekor wrote:
I found the trial size costs about $25 . Mold max 10 looks like plenty of
goo for 1 inch square.

Mold Max 10 is very soft - the hardness goes up with the number. I imagine
the OP might need harder ones - 30 or 40 if this is used to hold any
considerable weight firmly. It would be interesting to learn which exactly
part of the mic would be made from rubber (-like material). Last time I've
been inside old mics was a very long time ago but I cannot recall a large
elastic part like that.


--
/\_/\
((@v@)) NIGHT
()::) OWL
VV-VV

--
posted from
http://www.homeownershub.com/mainten...al-746624-.htm
using HomeOwnersHub's Web, RSS and Social Media Interface
to home and garden related groups

"mcp6453" wrote in message
...
What material can I pour into a 1" x 1" x 1" mold (a cube without a lid)
that
will solidify into a rubber-type consistency? I need to make a part for a
microphone that has not been manufactured in 50 years. It would be best if
the
material did not harden like acrylic. However, I'd use that as a last
resort if
I knew where to get it.

I've never done this sort of thing, so I have no idea what material to try
to
find or where to search for it. Since I only need a small amount, a
suggestion
for a material that is only available from a wholesale-only industrial
supply
house would be hard to follow.

Is there some sort of silicone that meets this requirement? Is there such
a
thing as liquid rubber? Here's hoping!

Any craft store should sell silicone based molding material. Since you
need such a small amount, save some time and shipping costs and just pick
some up at a craft store like AC Moore, Michael's, etc. You won't be making
a mold but you can use it to fill a small one.

Good Luck.