How large of a mold will this usually make? One large one? a few small ones? or is there a specified size reccommended?

I molded an object with a volume of 37 ounces but it took a set and 1/4 of another set of these bottles. Safe bet that if you have a model with a displacement greater than the one I did, you need two sets. Some find the simplest way is to pour rice around your model then pour the rice into measuring cups to get a better idea of how much. The hollow mold that I made was about 11.5 inches high and 4 inches in diameter with a width of 1 inch on the sides and bottom of the mold. So.. to encapsulate a volume of 37 ounces with enough material so that the mold was free standing it was a set and 1/4 of silicone at the least. My mold did not have a top though, with a top, it would have been a set and a half, no question about it.

is this heat resistant?

Not positive but aren't all silicones heat resistant. Great product.

How many ounces is each bottle?

It is sold and labeled in Lbs.Part A is 1.2lbs and Part B is 1.6lbs and I can't find any label that provides info regarding ounces. The dimensions are almost the same size as a 16 oz bottle so it's close to 16oz per bottle but that it an estimate. Sorry I can't provide more info.

Is it enough liquid to make a 12" vinyl record mold?

One would probably be enough, but it would be a thin coat. If you want the mold to be more durable, might go for a second just to hold the shape better.

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Smooth-On OOMOO™ 30 Tin Cure Silicone Rubber, Easy to Use Silicone Mold Making Kit, Pint Unit

Smooth-On OOMOO™ 30 Tin Cure Silicone Rubber, Easy to Use Silicone Mold Making Kit, Pint Unit

Product ID: 1792912

Details

Brand
Smooth-On
Item Form
Liquid
Material
Silicone
Special Feature
Easy-to-use
Specific Uses For Product

⏳6-hour full cure time

⚖️1:1 mix ratio by volume

🛠️240 psi tensile strength

₨47334

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Description

🎨 Mold your masterpiece faster—because your creativity can’t wait!

FAST TURNAROUND - Fully cures in just 6 hours, so your creative projects keep moving.
BEGINNER FRIENDLY - Ideal for novice mold makers with easy-to-use tin cure silicone formula.
RELIABLE STRENGTH - 240 psi tensile strength ensures durable molds for one to two-piece block designs.
EFFORTLESS PRECISION - Mix 1:1 by volume—no scale or vacuum needed for flawless molds every time.
VERSATILE APPLICATIONS - Perfect for sculptures, prototypes, plaster, resin, wax casting & more.

Smooth-On OOMOO™ 30 is a lavender-tinted, easy-to-use tin cure silicone rubber designed for mold making in art and industrial projects. With a simple 1:1 mix ratio by volume and no need for vacuum degassing, it cures fully in 6 hours to deliver durable molds with 240 psi tensile strength. Ideal for beginners, it supports casting plaster, resins, wax, and more, making it a versatile choice for one to two-piece block molds.

Specifications

ASIN	B004BNF3TK
Best Sellers Rank	#29,249 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #246 in Sculpture Molding & Casting Products
Brand Name	Smooth-On
Color	['Lavender']
Compatible Material	Rubber
Container Type	Can
Customer Reviews	4.3 4.3 out of 5 stars (3,763)
Full Cure Time	6 hours
Global Trade Identification Number	00751635821415
Item Form	Liquid
Item Package Quantity	1
Item Weight	2.9 pounds
Manufacturer	Smooth-On, Inc.
Material Type	Silicone
Model	OOMOO 30
Number of Pieces	1
Other Special Features of the Product	Easy-to-use
Part Number	OOMOO 30
Specific Uses For Product	Interior/Exterior
Tensile Strength	240 psi
UPC	751635821415
Unit Count	16 Ounce
Viscosity Level	Low
Volume	1200 ml
Water Resistance Level	Not Water Resistant

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