FXclay Ultra Fine Detail Modeling Clay


FXclay™ Ultra Fine Detail Modeling Clay is a non-sagging, non-sticky, self-cure modeling clay developed by a professional equine sculptor to capture and hold ultra fine details. Micron size FXclay particles are key to precision shaping and tooling at any angle. Average working time is 1 hour, fully cures to a beautiful mink gray color in 24 hours. Enhance detail with included Smoothing Solution to add texture and feathering.

Comes in 3 sizes: ¼ lb, 1 lb, 2.2 lbs (1Kg).

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FXclay Ultra Fine Modeling Clay

FXclay™ is our premium high density and purity 2-part epoxy clay formulated with micron sized particles to capture ultra fine detail while modeling and sculpting.  Add your talent and FXclay will capture and hold your modeling and sculpting details with better control. The viscosity is soft and easy to knead and requires no firing, it self-cures at room temperature.  Working time is 1 hour and cures rock hard in 24 hours. FXclay cures without flowing and no shrinkage to hold fine details. The final cure hardness is approximately 78D providing incredible strength! You can build it up in layers without a seamline and can be feathered to a glass smooth gloss finish. FXclay does not flake, chip, crack or peel. It bonds to most plastics, including vinyl and can be painted with acrylics, enamel, oil and pastels. FXclay is freeze/thaw stable, waterproof, even cures underwater!

FXclay kits include:

FXclay 1/4 lb
FXclay 1 lb

FXclay 2.2 lb (1,000g) kit

FXclay Product Photo Gallery

Use FXclay to:

  • Create Original Sculptures
  • Customize Action Figures & Model Horses
  • Build Models from Armatures
  • Fill into many different kinds of molds
  • Repair & Restore Dolls
  • Fix Ceramic & Porcelain Figurines
  • Taxidermy and Antler Repair
  • Create Complex Dioramas
  • Doll Customization and Repair
  • Create Jewelry
  • Create Rapid Prototypes
  • Filling Gaps

Who should use FXclay?

FXclay is a professional ultra fine detail modeling clay intended for use by industrial and commercial users and artists, which means it is not for children. Commercial FX Artists, Sculptors,Modelers and Taxidermists will appreciate the many attributes designed into FXclay:

  • Very economical considering it is a high performance sculpting clay
  • Incredible dynamic range during working time – from very soft to firm
  • No shrinkage, high strength and waterproof
  • Self-hardening. Simply mix equal parts by volume to use FXclay
  • Very easy to knead, even if you have carpal tunnel syndrome
  • Working time is 1 hour depending on room temperature, 24 hour cure
  • Stays soft in the containers for years
  • Will not delaminate from itself or other resin like polyurethanes
  • Does not flake, chip, crack or peel. Very useful when using rotary tools.
  • Easy clean-up with Smoothing Solution
  • Add dry pigment powder for other colors
  • Can be painted with acrylic, enamel, oil, pastels
  • Able to build upon itself in layers without a seamline
  • Viscosity is just right to reduce drooping during the working time
  • Holds fine details during cure, won’t flow
  • Very Adhesive after initial mixing
  • Bonds to most plastics including Vinyl
  • Cured hardness is that of most polyurethane resins
  • Extended shelf life. Stays soft in containers even at -20 F.
  • Freeze/Thaw stable.


Question: A common question we get is “Can FXclay be used in place of Magic Sculpt, Free Form® or Apoxie® Sculpt & Clay?”

Answer: Yes, while the formulations of these competitive products differ, they can generally be interchanged with FXclay.

Free Form is a registered trademark of Smooth-On, Inc. Apoxie is a registered trademark of David G Brummel. FXclay is formulated by Unbridled LLC and is not affiliated with or endorsed by Smooth-On, Inc. or Aves Studio LLC.


Wear gloved and knead together thoroughly equal parts of Resin (Part A) and Hardener (Part B) by volume, not weight. Continue kneading until color is uniform. Working time is approximately 1 hour, depending on room temperature (warmer less time, cooler more time). Fully cured in 24 hours. Use Smoothing Solution™ to enhance detail, feathering and smoothing to a gloss finish.
P102-Keep out of reach of children. P103-Read label before use. P261-Avoid breathing dust. P264-Wash hands and exposed skin thoroughly after handling. P280-Wear protective gloves/protective clothing/eye protection/face protection. P281-Use personal protective equipment as required. P233-Keep container tightly closed when not in use. Warning: H315 Causes skin irritation. H317 May cause an allergic skin reaction. H320 Causes eye irritation.

FXclay™ is a trademark of Unbridled, LLC.

Safety Data Sheet
Safety Data Sheet


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