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

⚗️Platinum silicone easy mix

🛡️Tear-resistant durability

₹ 9109

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Description

🛠️ Mold your masterpiece with confidence—durability meets ease!

BUILT TO LAST - Tear-resistant rubber ensures your molds survive countless casts without fail.
TRUSTED BY PROS - Join thousands of artists and makers who rate it 4.6 stars for consistent quality.
PRECISION PERFECT - Experience ultra-low shrinkage for molds that keep their shape and detail over time.
VERSATILE CASTING - Ideal for wax, gypsum, resins, and more—expand your creative horizons.
EFFORTLESS CRAFTING - Easy-to-use platinum silicone mix means less hassle, more creating.

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 long-term shrinkage. Perfect for casting wax, gypsum, resins, and other materials, it offers professional-grade durability and ease of use, making it a top choice for artists and crafters seeking reliable, long-lasting molds.

Specifications

Asin	B00ETAY8RI
Best Sellers Rank	#15,723 in Arts, Crafts & Sewing (See Top 100 in Arts, Crafts & Sewing) #128 in Sculpture Molding & Casting Products
Brand Name	Smooth-On
Color	Blue
Customer Reviews	4.6 4.6 out of 5 stars (749) 4.6 out of 5 stars
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
Unit Count	1 Count
Upc	751635227415
Warranty Description	No Warranty

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₹ 9109

Duties & taxes included

In stock

Sold byAmazon IndiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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Join PRO →

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TrustScore 4.5 | 7,300+ reviews

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