PMC® 121 Series

The PMC®-121 Series urethane rubbers 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 121-30 Dry
PMC 121-30 Wet
PMC 121-50 Wet

VytaFlex® Series
Liquid Urethane Rubbers

Using Smooth-On’s exclusive “V-Polymer®” technology, VytaFlex® urethane rubbers offer superior physical and performance properties for casting concrete. VytaFlex® urethanes are available in 10A, 20A, 30A, 40A, 50A and 60A Shore hardness’s and feature convenient one-to-one by volume mix ratios. Vacuum degassing is not necessary and VytaFlex® rubbers cure with negligible shrinkage to a durable rubber that will last in production.

VytaFlex® mold rubbers work especially well for casting pigmented / colored concrete. Molds made with VytaFlex® Series
urethanes will render accurate and uniform colored castings.

ReoFlex® Series
Liquid Urethane Rubbers

ReoFlex® urethane rubbers offer superior physical and performance properties for production casting of wax, plasters, and
resins. ReoFlex® urethanes are available in 20A, 30A, 40A, 50A and 60A Shore hardnesses and feature convenient one-to-one
by volume mix ratios. Vacuum degassing is not necessary and ReoFlex® rubbers cure with negligible shrinkage to a durable
rubber that will last in production. ReoFlex® "Wet" rubbers will shrink somewhat over time vs. "Dry" formulations.
ReoFlex® mold rubbers are used for a variety of applications including making molds to reproduce sculpture and
architectural elements, as well as for making special effects, toys and prototypes. Vibrant colors can be achieved by adding
So-Strong® Color Tints, available from Smooth-On.

PMC®-724
Polyurethane Rubber Compound

Used by artists and industry the world over for a variety of design, casting and special effects applications, PMC®-724 is by far the most versatile urethane rubber compound available on the market today. It is inexpensive, mixes and pours easily, and will cure to a durable rubber with negligible shrinkage. Low viscosity ensures flawless pick-up of even the finest detail with minimal bubble entrapment. PMC®-724 PUTS YOU IN CONTROL! Using optional 'Part D', you can thicken PMC®-724 to a paste-like consistency for vertical surface brush-on applications or for getting into those hard-to-reach undercuts. If you like to work with a more flexible rubber, optional 'Part C' is available to soften PMC®-724 all the way down to a Shore A6. Typical applications include reproducing sculpture (lost wax process), creating special effects, making
fiberglass panel & part molds, on-site architectural restoration and new construction molds. A variety of colors and special effects can be achieved by adding SO-Strong® urethane colorants.

PMC® – 744
Polyurethane Rubber Mold Compound

PMC®-744 has been used for years by mold making professionals to cast plaster, concrete, resins, etc. It is excellent for making molds that are strong, durable and dimensionally stable. Low viscosity ensures fine detail reproduction.
PMC®-744 is ideal for making ceramic case molds and plaster block molds, reproducing ornamental plaster, making molds for casting concrete, casting a variety of Smooth-On urethane resins, casting wax for making candles and making a mechanical rubber parts.

PMC® – 746
Polyurethane Rubber Compound

PMC®-746 was developed to make molds for casting gypsum plasters. Like PMC®-744, this product is well suited for use as a rubber case mold – especially large case molds where extra rigidity is required. Shore hardness is 60 A. Because of its durability and moisture resistant properties PMC®-746 is also used by zoos and museums for a variety of mold-making, display and exhibit applications. It features a convenient mix ratio (2:1 by weight or volume), and contains no mercury.

PMC®-770
Industrial Liquid Rubber Compound

PMC®-770 is a Shore 70A addition to our line of industrial liquid rubber products (such as PMC®-780 and PMC®-790) used for a variety industrial and casting applications. Mixed two parts A to one part B by weight, PMC®-770 pours easily and cures at room temperature to a solid Shore 70A rubber that has exceptional performance characteristics and dimensional stability.
It is suitable for production casting of abrasive materials such as concrete (pre-cast concrete, making concrete stamping pads, etc.) and gypsum plasters with high exotherms. It is also suitable for rubber mechanical parts of varying configurations (gaskets, wheels, pullies) as well as ball mill liners and vibration/shock pads.

PMC®-780 Dry & PMC®-780 Wet
Industrial Liquid Rubber Compounds

PMC®-780 is a premium performance urethane rubber that offers exceptional strength, durability and abrasion resistance. PMC®-780 DOES NOT CONTAIN MOCA – a known cancer causing agent and hazard. Mixed two parts A to one part B by weight, PMC-780 pours easily and cures at room temperature with
negligible shrinkage to a solid Shore 80A rubber. Pick The One Best Suited For Your Application: Original PMC®-780 Dry does not exude oil.
New PMC®-780 Wet contains a built-in release agent to aid in demolding concrete. (Note: “wet” rubber has a higher net shrinkage value over time vs. “dry “ rubber.) Both are used around the world for casting abrasive materials such as concrete (pre-cast concrete, making concrete stamping pads, etc.) and gypsum plasters with high exotherms. PMC®-780 Dry is also commonly used to make rubber mechanical parts of varying configurations (gaskets, wheels, and pullies) as well as ball mill liners and vibration/shock pads.

PMC® - 790
Industrial Liquid Rubber Compound

PMC®-790 is a new Shore 90A industrial urethane rubber compound designed to meet the most stringent requirements of industrial production applications. It is a very hard rubber that offers superior tear and tensile strength as well as impact and abrasion resistance.

Brush-On™ 40, 50 Series
Brushable Rubber Compounds

Smooth-On’s Brush-On Series of mold rubbers are extremely versatile and are famous for their abrasion resistance and high tear strength. They have the convenience of a one-to-one mix ratio and are easy to mix and apply with a brush or spatula. Brush-OnÔ 40, 50 & 60 paint onto vertical surfaces without sagging and will cure with negligible shrinkage to durable rubbers that perform and last in production. Each will capture exact detail from any original model.

Clear Flex® 50 & 95
Water Clear Urethane Rubber

Clear Flex®50 and Clear Flex® 95 are water white clear urethane liquid rubber compounds designed for applications that
require absolute clarity and resistance to sunlight. Low viscosity ensures easy mixing and pouring. Clear Flex® 50 and 95 cure at room temperature with negligible shrinkage. Cured castings are clear, flexible and UV Resistant. Vibrant colors and color effects are achieved by adding pigments.