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This easy-to-use silicone rubber compound is perfect for first-time silicone users who don’t have specialized mold-making equipment. Smooth-On Oomoo has a convenient one-to-one by volume mix ratio, so no scale is necessary.
Suitable for a variety of art-related and industrial applications such as making molds for sculpture and prototype reproduction, casting plaster, resins, and wax, both Oomoo 30 and Oomoo 25 have a low viscosity that assures easy mixing and pouring, usually eliminating the need for vacuum degassing. Both cure at room temperature with negligible shrinkage and have good tear strength.
Oomoo 25 is a faster version, with a 15-minute pot life and a 75-minute cure time. It has a soft 25A Shore hardness.
Oomoo 30 is a slightly harder version, with a 30A Shore hardness. It has a 30-minute pot life with a six-hour cure time.
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™ Smooth-On is a trademark.® OOMOO is a trademark.
CA Prop 65
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(based on 43 reviews)
of respondents would recommend this to a friend.
Reviewed by 43 customers
Displaying reviews 1-10
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Great Stuff, but be sure to degas
from Northern IL
Comments about Smooth-On Oomoo 30 Silicone:
The Smooth On OohMoo 30 product really is great stuff. I do castings that have alot of detail. I use them for hydrocal projects. I did an earlier review and said nothing but good things about it, but I found over time, little air bubbles starter appearing in the finer details of my molds after I used them for awhile. Ever since, I have purchased a degassing chamber, and those molds are so far perfect in every way. Right now you can purchase a 2-3 gallon Vacuum Chamber with pump for around $130 to $160, it is well worth your time. Now, if your casting don't have as much detail, perhaps you can do without the degassing chamber, but I'll use it always going forward, well worth the money to give you higher quality castings. Love the flexibility of the Smooth On products though, very easy to remove your project from the molds.
Bottom Line Yes, I would recommend this to a friend
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Pretty good stuff
Used it to make a mold and it turned out well.
Easy as Pie!
By Williams Concrete Works
from Chester, SC
It really is the best mold making product on the market. Now I know why all the molds we've purchased in the past were purple. lol The Product is easy to use and turns out great molds. Good for Novice or Expert moldmaker
Awesome! So far the best 1:1 ratio (silicone to hardner)
By DM Wink
from Northern VA
Plan ahead and buy in the largest quantity you can afford. Great deals and the best price I've found for the OOMOO 30. Thanks Blick!
Awesome. As advertised.
By Josephus of Kartenon
from Palm Coast, Fl.
Was as advertised.
(1 of 1 customers found this review helpful)
By professional amateur
from New York, NY
I have never used anything like this before and it was so easy to mix and use! It did exactly what it said it would do and was so fast!! I have never made molds of any kind and I am so happy they have something like this for amateurs like myself!
Excellent for mold making
from Redlands, CA
This OOMOO silicone is terrific. I had attempted to create molds in the past and have always had difficulty in making a quality product. Then I learned about this stuff. The two part mixing is extremely simple. Mix equal parts well and pour. In 6 hours, you have a perfect mold for casting. I wish I knew about this sooner.
(0 of 1 customers found this review helpful)
Best customer service ever!
from Batesville, Indiana
I made a 3D soap mold with this! Outstanding! Will buy again!
(1 of 2 customers found this review helpful)
Smooth-On Oomoo is best rubber ever I have used for mold mak
from Atlanta, Georgia
Sure wish it was cheaper so I could buy a whole lot more
OOMOO 30 = Mold Making Simple!!!
from Newington, CT
Have used OOMOO 30 exclusively for making RTV master mold for custom soft plastic fishing lures. OOMOO is an exceptional product for both veginners and advanced mold makers. The product is very easy to use, and produces very detailed molds.
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