if I form a cylinder 1.25" x 10" long, if it is only supported at the end, will it remain straight, without drooping, for at least 30 seconds?

The clay's rigidity is dependent on temperature. It will need to be warm (90F/32C) to shape, but will slump, unless you wait for the clay to cool (70F/21C). You could use an armature wire to to prevent slumping while warm, or cool by spraying "dust-off" holding the can upside-down. It is a very hard clay though, and will hold its shape better than other oil clays.

Can I use this to shape a cars interier and exterior, will it hold up?

Only to make a mold of it. The hard clay you have to beat in a crockpot to be able to work with it. It is temperature sensitive as it will turn into a liquid so it becomes mallible.would suggest sculpting then making a silicone mold using something like moldmax brush on the fiber resin inside the mold

The title says this is oil-based, but other sites say it is wax based, which one is correct?

It's a mixture of both, but when finally working with it you'll notice it's more wax based...

I could use a hairdryer to help smooth things out as i sculpt?

Yes to maintain it at managable state. That way it can extend your sculpting time and to correct any part of your sculpture if needed...

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Chavant NSP Hard - 2 Lbs. Professional Oil Based Sulfur Free Sculpting Clay - Brown

Product ID: 16501770

Details

Age Range (Description)
Adult
Brand
Chavant
Color
Brown
Educational Objective
Creative Skill
Included Components
Clay Knife
Item Weight
2 Pounds

🔥Reusable & melt-able for endless creativity

🧪Sulfur-free, safe with silicone molds

🛢️Oil-based, non-drying formula

¥11629

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Description

🎨 Sculpt like a pro, create without limits!

COMPACT POWERHOUSE - 2 lbs of premium brown clay in a portable, easy-to-handle size.
ENDLESS CREATIVITY LOOP - Reusable and melt-able clay means no waste, just pure sculpting freedom.
SAFE FOR SILICONE MOLDS - Sulfur-free formula ensures flawless compatibility with silicone casting.
STAY FRESH SCULPT LONGER - Non-drying oil-based clay keeps your masterpiece workable for hours.
PROFESSIONAL GRADE PRECISION - Trusted by pros for detailed, durable modeling and sculpting.

Chavant NSP Hard is a 2-pound, professional-grade, oil-based sculpting clay that remains soft and workable without drying out. Its sulfur-free formula makes it perfectly safe for use with silicone molds, while its reusable and melt-able nature offers sustainable, long-lasting sculpting flexibility favored by artists and professionals alike.

Specifications

ASIN	B00YNY4R2G
Age Range Description	Adult
Best Sellers Rank	#67,945 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #320 in Pottery & Modeling Clays
Brand Name	Chavant
Color	Brown
Customer Reviews	4.5 4.5 out of 5 stars (150)
Educational Objective	Creative Skill, Dexterity, Hand-Eye Coordination
Included Components	Clay Knife
Item Dimensions	5.71 x 2.91 x 2.64 inches
Item Weight	2 Pounds
Manufacturer	Chavant
Manufacturer Part Number	ChavantNSPHARD2lb
Material Type	Clay
Model Name	Chavant NSP Hard
Model Number	ChavantNSPHARD2lb
Number of Items	1
Other Special Features of the Product	Non Drying
Recommended Uses For Product	Modeling,Sculpting
Unit Count	32.0 Ounce

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¥11629

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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