No, this is an oil based clay. It can be softened with heat but it will never harden like a Polymer clay. You might be looking for something more along the lines of Sculpey, which can be hardened by baking it in the oven.

Can a plaster mold be used with this clay

Yes. You can make a sculpture out of this clay and make a plaster mold off of it. I would spray the clay surface with some Krylon crystal clear acrylic spray first to seal the clay and help the clay to come out of the mold easier. also...try to remove the clay out of the new plaster mold while it is still warm. Don't let the clay become hard again and you will have an easier time of cleaning out the clay from the mold. Hope this helps. Greg

When will the new HARD-Premium Grade style of Monster Clay be available via Amazon for purchase?

“New HARD clay” I wasn’t aware of Hard Clay, maybe it’s a new item coming out. So maybe the new HARD clay will dry. You will have to read the description or go to Monster Makers.com for details.

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Monster Clay Premium Grade Modeling Clay - Medium - (18lb CASE) - Brown - 18 pounds - Modeling

Monster Clay Premium Grade Modeling Clay - Medium - (18lb CASE) - Brown - 18 pounds - Modeling

Product ID: 4262074

Details

Age Range (Description)
Adult
Brand
EZEAOR
Color
Brown
Educational Objective
Dexterity
Included Components
Oven-Safe
Material
Clay

🔥Oven-safe containers for versatile sculpting

🧪Sulfur-free, non-toxic for safe professional use

⚖️18lb bulk case for marathon creativity

NZ$797

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Description

🎨 Sculpt your legacy with Monster Clay — where every detail comes alive!

VALUE PACKED - Lower density means 25% more clay per pound compared to typical oil-based clays—more art, less cost.
ELASTIC MASTERY - Unique oil/wax blend offers high plasticity and a taffy-like stretch when warmed for flawless detail.
BULK CREATIVE POWER - 18 pounds of premium clay to fuel your next masterpiece without interruption.
CLEAN SAFE CRAFTING - Sulfur-free and non-toxic formula ensures compatibility with platinum silicone molds and peace of mind.
HEAT READY FLEXIBILITY - Oven-safe packaging lets you melt and reshape your work effortlessly on demand.

Monster Clay Premium Grade Modeling Clay is an 18lb sulfur-free, oil/wax based sculpting medium favored by professional creature designers worldwide. Packaged in oven-safe containers, it offers high plasticity and a unique elastic quality when warmed, making it ideal for detailed modeling and life cast modifications. Non-toxic and compatible with platinum silicone molds, it provides 25% more clay per pound than typical oil-based clays, delivering exceptional value and versatility for serious artists.

Specifications

ASIN	B008UZLGIW
Age Range Description	Adult
Best Sellers Rank	#174,097 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #668 in Pottery & Modeling Clays
Brand Name	EZEAOR
Color	Brown
Customer Reviews	4.8 4.8 out of 5 stars (95)
Educational Objective	Dexterity, Shape Recognition
Included Components	Oven-Safe Container
Item Dimensions	7.48 x 7.48 x 12.01 inches
Manufacturer	Monster Makers
Manufacturer Part Number	MCP-20
Material Type	Clay
Model Name	Monster Clay
Model Number	MCP-20
Number of Items	1
Other Special Features of the Product	Non-Toxic
Recommended Uses For Product	Modeling
UPC	686603385562
Unit Count	288 Fluid Ounces

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

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NZ$797

Duties & taxes included

In stock

Sold byAmazon New ZealandDelivered 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 New Zealand.

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TrustScore 4.5 | 7,300+ reviews

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

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