PMC™-121 Series

Buy Smooth-On at FormX

Smooth-On is one of the world’s leading manufacturers of 3D modeling materials such as mold-making, casting and special effects materials, as well as industrial casting resins, adhesives and equipment. FormX is the main distributor of Smooth-On products in Europe.

Smooth On

feature convenient one-to-one by volume mix ratios. PMC-121/30 Dry and PMC-121/30 Wet are exceptionally strong and abrasion resistant for soft urethane mold rubbers. Pick the one best suited for your application. The dry version does not exude oil and can be used for casting waxes, Smooth-On liquid plastics, gypsum plasters and other materials. The wet version exudes oil that aids in demolding hard plasters and concrete. PMC-121/50 is a “wet-only” mold rubber that is long lasting and durable when used in a variety of applications including reproduction of ornamental plaster, precast concrete and ceramic case molds. Note: “wet” rubber has a higher net shrinkage value vs. “dry " rubber.

PMC-121 Series mold rubbers are easy to mix and pour and are exceptionally strong. They are suited for a variety of applications including making molds to reproduce sculpture and architectural elements, as well as for making special effects, toys and prototypes. These rubbers will meet the stringent demands of production casting of wax, plasters, concrete, resins and epoxies. Vibrant colors can be achieved by adding So-Strong™ Color Tints, available from Smooth-On.

Features

The wet version exudes oil that aids in demolding hard plasters and concrete.

Shore: 30 A.
Pot Life: 30 mins
Cur Time: 16 hrs

PMC™-121 30/WET PMC™-121 30/WET ... € 23.14 Buy now

Features

The dry version does not exude oil and can be used for casting waxes, Smooth-On liquid plastics, gypsum plasters and other materials.

Shore: 30 A.
Pot Life: 30 mins
Cur Time: 16 hrs

PMC™-121 30/WET PMC™-121 30/WET ... € 23.14 Buy now

Features

Shore: 50 A.
Pot Life: 30 mins
Cur Time: 16 hrs

PMC™-121 50/WET PMC™-121 50/WET ... € 572.69 Buy now

Why buy at FormX?

  • Dedication to Materials

    Dedication to Materials icon

    For over thirty years we have sought out the highest quality modelling, moulding and casting materials from around the world.

  • Inspiring + Unique

    Inspiring + Unique icon

    From silicones and resins to Jesmonite and special effects materials — a curated range for professionals, artists and makers.

  • Expert Advice

    Expert Advice icon

    Our sales team is widely known for their knowledge and dedication, supporting you in mould making, casting, sculpture and prototyping.

  • Shipping Across Europe

    Shipping Across Europe icon

    We ship from our warehouses in Amsterdam, Barcelona and Madrid to customers throughout Europe, from Greece up to Norway.

  • Amsterdam Original

    Amsterdam Original icon

    Founded in Amsterdam, FormX grew from a local art foundry into a major European supplier — with our roots firmly in the city.

Visa logo iDeal logo Mastercard logo Paypal logo FedEx logo DPD logo GLS logo
This website has been developed by Usecue B.V.
© 2026 FormX B.V.