Casting from an original carving #2: Rubber mold inside the vessel

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Blog entry by Jordan posted 01-31-2012 01:01 AM 1761 reads 1 time favorited 14 comments Add to Favorites Watch
« Part 1: Would anyone like to follow along? Part 2 of Casting from an original carving series Part 3: Rubber mold outside the vessel »

Here is the carved gourd with 3 coats of rubber on the inside – I will need 4 but it can be turned upside down to drizzle rather than having to smooth it with my hand like the first 3 – and let me tell ya, I was up to my elbows in rubber – so much so that I actually had to shave my arm to get the silicone balls off the hair!

Each coat has to be a different colour so you know you’ve covered all areas. It is a brush on rubber however it still remains kind of soft and floppy until it sets up in about 30 minutes so I must keep turning the gourd. It should be brushed on in thinner coats than I use however I’m impatient and it’s too hard to get a brush inside of this.

And by the way – there were holes right through the top tabs? I had to fill those with putty otherwise the mold would not come off later. However, silicone is very forgiving so other than a thin clear coat of Krylon, I did not prepare my gourd with anything prior to applying the rubber. Neither do I when I take a casting from wood.

At this point I have used about 8 cups of rubber and have wasted about 1 cup of that on drippage and leftovers after pot life.

After the rubber dries (in about an hour in a warm temp room) utensils are easy to clean and peel and ready for use.

I do not promote particular companies however I have favourable results with Smooth-On products.


14 comments so far

View SASmith               's profile


1850 posts in 3009 days

#1 posted 01-31-2012 01:17 AM

Very interesting.
Off to google smooth-on.

-- Scott Smith, Southern Illinois

View Joe Lyddon's profile

Joe Lyddon

10115 posts in 4074 days

#2 posted 01-31-2012 01:26 AM

You really have to get gooey don’t you?

Interesting procedure…

Thank you.

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: ... My Small Gallery:"

View Jordan's profile


1400 posts in 3146 days

#3 posted 01-31-2012 01:44 AM

Joe you don’t normally but because the hole of this is not big, I found it easier to use my hand rather than brush which I will use on the outside.


View longgone's profile


5688 posts in 3330 days

#4 posted 01-31-2012 01:44 AM

I think I will just read and watch. I don’t see me doing any sculpteds box castings anytime soon…but you sure keep it interesting for other projects.

View patron's profile


13606 posts in 3363 days

#5 posted 01-31-2012 02:29 AM

wood carver
a beautician

how cool !

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View Triumph1's profile


891 posts in 3101 days

#6 posted 01-31-2012 02:49 AM

Very cool to see this process. Thanks for making us more intelligent Jordan!

-- Jeff , Wisconsin Please...can I stay in the basement a little longer, please!

View Karson's profile


35125 posts in 4422 days

#7 posted 01-31-2012 03:05 AM

Cool Jordon.

-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Southern Delaware soon moving to Virginia †

View BertFlores58's profile


1698 posts in 2944 days

#8 posted 01-31-2012 03:13 AM

Showing another side of you Jordan… Skill on the dremel cutting and wasting…. Now you are creating something back from it. Thanks for the knowhow.

-- Bert

View kiefer's profile


5619 posts in 2688 days

#9 posted 01-31-2012 04:59 AM

I think you did the wrong side , the carving is on the outside, what a waste .
Just having fun :]>


-- Kiefer

View lanwater's profile


3111 posts in 2956 days

#10 posted 01-31-2012 06:42 AM

I used mold builder (liquid rubber) to build 3D molds of small toys that I fill with plaster. once the plaster is hard I peel the rubber mold and my kids color on on them.
It looks like the same process.

This is exciting.

-- Abbas, Castro Valley, CA

View LittlePaw's profile


1571 posts in 3100 days

#11 posted 01-31-2012 06:58 AM

How about that, Jordan! I was thinking about casting my Canada goose when finished. I was considering making cast copies because the original is taking so long and once it is sold or given away, I won’t have anything left to remind me of it. As you suggested, I stopped counting the time I put into it and just getting everything as close to perfect as I can. I found Smooth-on online and they sent me their lit. I wasn’t sure about their product, but I see you using it and it is working well, I will try it as well. Looking great, Jordan. You’ll post the finished casting, won’t you?

-- LittlePAW - The sweetest sound in my shop, next to Mozart, is what a hand plane makes slicing a ribbon.

View Jordan's profile


1400 posts in 3146 days

#12 posted 01-31-2012 07:02 AM

Little Paw , I will indeed post photos of all of the process as well as the finished product(s).

Hope y’all enjoy the journey. Every day this week I will be preparing it so the blogs will not be that far apart.


View harrywho's profile


120 posts in 3254 days

#13 posted 01-31-2012 04:06 PM

Which Krylon did you use Jordan?

-- Harry, Indiana

View Jordan's profile


1400 posts in 3146 days

#14 posted 01-31-2012 06:50 PM

I used the matte clear finish Harry – I use that on a lot of things as several coats gives me a slight less than satin finish when I don’t want a shine.


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