What size does this make

This kit will yield 51.2 cubic inches of material.

what's the difference between this mold star and the 16 fast?

This version has no color - it is cloudy clear.

Will different silicones stick together when making a mold? I ran out so part of my mold is cured?

You should be fine with using other silicones if you use a silicone release spray when you create your mold. Something like "Smooth-On Universal Mold Release" would be sufficient.

Been wanting to try this. Is there a step by step tutorial before I buy it ?

Yes, if your looking for tutorial videos, go to https://www.smooth-on.com/tutorials/ to learn about the many different mold making techniques.

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Smooth-On Mould Star 20T Silicone Mould Making Rubber - Trial Unit

Smooth-On Mould Star 20T Silicone Mould Making Rubber - Trial Unit

Product ID: 254560414

Details

Brand
Smooth-On
Colour
Multicolor
Item dimensions L x W x H
15 x 14.7 x
Material
Silicone Metal
Shape
Star

⏳30 min demold time, fast turnaround

🔥Heat resistant up to 450°F (232°C)

⚖️1:1 volume mix ratio, no scale needed

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€ 138.61

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In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⭐ Mold like a pro, cast like a boss! 🔥

RAPID MOLD CREATION - Demold in just 30 minutes to accelerate your creative workflow and beat deadlines.
DURABLE TEAR RESISTANT - Soft yet strong silicone rubber ensures molds last through countless casts without wear.
HEAT RESISTANT PERFORMANCE - Withstands up to 450°F (232°C), ideal for demanding applications and professional-grade results.
EFFORTLESS PRECISION MIXING - Mix 1A:1B by volume—no weighing scale required, saving you time and hassle.
VERSATILE CASTING COMPATIBILITY - Perfect for wax, gypsum, resins, concrete, and even low-temp metal alloys—expand your project possibilities.

Smooth-On Mould Star 20T is a translucent platinum-cure silicone rubber with a 1:1 volume mix ratio, curing to a soft yet durable Shore 20A hardness. It offers fast demolding in 30 minutes, excellent tear resistance, and heat resistance up to 450°F, making it ideal for versatile casting applications including wax, resins, concrete, and low-temperature metal alloys.

Specifications

ASIN	B00LU4YFK6
Brand Name	Smooth-On
Color	Multicolor
Customer Reviews	4.6 4.6 out of 5 stars (714)
Item Dimensions	15 x 14.7 x 8.1 centimeters
Item Weight	1.09 kg
Manufacturer	Smooth-On Inc
Manufacturer Part Number	3573423
Material Type	Silicone Rubber Metal
Model Number	3573423
Number of Pieces	1
Shape	Star
UPC	751635587410
Unit Count	1.0 Count

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