whats the difference between oomo 30 and moldstar ?

OOMOO 30 has a Shore hardness rating of 00-30, which is about as squishy as a gel shoe insert. Moldstar 30 is a hardness of Shore A-30, which is closer to pencil eraser hardness. It’s confusing, but there are 2 Shore hardness scales and a 30 on one is very different from a 30 on the other. In the description when it talks about hardness, pay attention to whether it says Shore A or Shore 00.

What color is this silicone? Can I use mica powders to color it

It is blue when mixed, and very opaque, so I doubt powders will be able to color it much if at all. If you're looking to label your molds, I've 3D printed mirrored text using a raft, and set it into the mixed material. It floats, and pulls away cleanly once the material is cured. If you want a platinum cure 2 part silicone around shore-A 30 you can color, I might suggest DragonSkin 30 or Platsil Gel-25.

Hi. i've made a wax mold of a small animal bone using this silicone method. i'm curious if i can use clay as well. i'm looking to make jewelry..

On Smooth On's website it states that this line of mold will not work with modeling clays that contain sulfur. Their website was very helpful and has lots of information: http://www.smooth-on.com/Silicone-Rubber-an/c2_1115_1341/index.html

No. Smooth On does however make a food safe silicone called Smooth -Sil 940

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Smooth-On Mold Star 30 Silicone Mold Making Kit - Easy to Use & Long-Lasting Silicone Mold (2-Pound)

Product ID: 5665350

Details

Brand
Smooth-On
Color
Blue
Item dimensions L x W x H
7.52 x 5.98 x
Material
Silicone
Shape
Star

⏳Low long-term shrinkage

⚡Fast, easy platinum cure

🛡️Tear-resistant durability

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Description

🛠️ Mold your masterpiece with confidence—durability meets ease!

BUILT TO LAST - Soft yet strong silicone rubber resists tears for extended mold life
EFFORTLESS USE - User-friendly platinum silicone mix cures quickly with minimal fuss
PRECISION CASTING - Maintains shape with minimal shrinkage, ensuring flawless reproductions
TRUSTED BY CREATORS - Highly rated with 4.6 stars and a top 200 rank in sculpture molding
VERSATILE COMPATIBILITY - Perfect for wax, gypsum, resin, and more—expand your creative toolkit

Smooth-On Mold Star 30 is a 2-pound platinum silicone mold making kit that cures into a soft, strong, and tear-resistant rubber with very low shrinkage. Ideal for casting wax, gypsum, resins, and other materials, it offers professional-grade durability and precision for artists and makers seeking reliable, long-lasting molds.

Specifications

ASIN	B00ETAY8RI
Best Sellers Rank	#18,343 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #156 in Sculpture Molding & Casting Products
Brand Name	Smooth-On
Color	Blue
Customer Reviews	4.6 4.6 out of 5 stars (746)
Item Dimensions	7.52 x 5.98 x 2.99 inches
Item Weight	2.5 pounds
Manufacturer	Smooth-On, Inc.
Manufacturer Part Number	moldstar30
Material Type	Silicone
Model Number	COMINHKR067156
Number of Items	1
Number of Pieces	1
Shape	Star
UPC	751635227415
Unit Count	1 Count
Warranty Description	No Warranty

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€ 97.31

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In stock

Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Italy.

Secure transaction

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