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)

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

⏳45 min pot life

🎨captures fine detail

🛡️tear-resistant durability

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MX$2276

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Details

Brand
Smooth-On
Color
Blue
Item dimensions L x W x H
7.52 x 5.98 x

Description

🛠️ Mold like a pro, create like a visionary!

BUILT TO LAST - Tear-resistant silicone ensures molds endure countless casts
DETAIL PERFECT - Ultra-low shrinkage captures every intricate detail
RELAXED WORKFLOW - 45-minute working time lets you pour with confidence, no rush
VERSATILE CASTING - Ideal for wax, gypsum, resin, clay & more
EFFORTLESS PRECISION - Easy 1:1 mix ratio for flawless molds every time

Smooth-On Mold Star 30 is a premium platinum silicone mold-making kit designed for professionals and creatives alike. With a user-friendly 1:1 mix ratio, 45-minute pot life, and tear-resistant, low-shrinkage rubber, it delivers durable, flexible molds that capture fine details perfectly. Perfect for casting a wide range of materials including resin, wax, and gypsum, this kit elevates your mold-making game with reliable, long-lasting results.

Specifications

ASIN	B00ETAY8RI
Best Sellers Rank	#20,520 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #208 in Sculpture Molding & Casting Products
Brand	Smooth-On
Brand Name	Smooth-On
Color	Blue
Customer Reviews	4.6 out of 5 stars 739 Reviews
Item Dimensions	7.52 x 5.98 x 2.99 inches
Item Weight	0.59 Kilograms
Item dimensions L x W x H	7.52 x 5.98 x 2.99 inches
Manufacturer	Smooth-On, Inc.
Manufacturer Part Number	moldstar30
Material	Silicone
Material Type	Silicone
Model Number	COMINHKR067156
Number of Pieces	1
Shape	Star
UPC	751635227415
Unit Count	1.0 Count
Warranty Description	No Warranty

Reviews

I**S

22.10.2025

K**S

26.06.2022

B**O

18.10.2016

J**R

29.09.2025

J**H

23.10.2025

T**Y

20.10.2020

J**R

2.06.2025

M**A

9.01.2020

F**L

12.02.2026

M**L

27.04.2021

M**A

30.11.2021

J**A

23.02.2026

D**G

22.12.2017

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