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PMC-hard rubbers

Buy Smooth-On at FormX

Smooth-On is one of the worlds leading manufaturers 3D modeling materials such as mold-making, casting and special effects materials but also industrial casting resins, adhesives and equipment. FormX is main distributor of Smooth-On products in Europe.

PMC-Series

These are somewhat harder PU-rubbers that are traditionally used in the ceramic industry.
They exhibit excellent wear resistance, cure with negligible shrinkage and are economical.


Technical bulletin PMC 744
Technical bulletin PMC 746
Technical bulletin PMC 770
Technical bulletin PMC 780
Technical bulletin PMC 790

PMC 744

PMC-744 info

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 and making a variety of mechanical rubber parts.

- Semi Transparent Amber Colour
- Shore 44A

Technical Bulletin

- Read the safety information label. Click on the image

- Lisez les informations de sécurité cliquez sur l'image

- Lea la etiqueta de información de seguridad. Haga clic en la imagen

- Lees het veiligheidsinformatie label. Klik op de afbeelding.

- Lesen Sie das Sicherheitsinformationsetikett. Klicken Sie auf das Bild.

PMC-744

  • PMC™-744 /10,89 kg

    Shore A44| Cure Time: 16H00

    202,74 EUR

PMC 746 Safety

- Read the safety information label. Click on the image

- Lisez les informations de sécurité cliquez sur l'image

- Lea la etiqueta de información de seguridad. Haga clic en la imagen

- Lees het veiligheidsinformatie label. Klik op de afbeelding.

- Lesen Sie das Sicherheitsinformationsetikett. Klicken Sie auf das Bild.

PMC 746

PMC-746 info

PMC-746 was developed to make molds for casting gypsum plasters. It is well suited for use as a rubber case mold – especially large case molds where extra rigidity is required. Durability and moisture resistant properties PMC-746 is also used by zoos and museums for a variety of mold-making, display and exhibit applications. Other applications include making plaster block molds, reproducing ornamental plaster, pre-cast concrete molds, casting waxes, rigid polyurethanes, epoxies and a variety of special effects.

Shore hardness is 60 A
mix ratio: 2:1 by weight or volume
contains no mercury.

Technical Bulletin

PMC-746

  • PMC™-746 /1,36 kg

    Shore A46| Cure Time: 16H00

    34,19 EUR

  • PMC™-746 /10,89 kg

    Shore A46| Cure Time: 16H00

    204,19 EUR

PMC 770

PMC-770

Shore 70A rubber that has exceptional 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. Suitable for rubber mechanical parts of varying configurations (gaskets, wheels, pulleys) as well as ball mill liners and vibration/shock pads.

Shore 70A hardness
mixed two parts A to one part B by weight

PMC 770 Safety

- Read the safety information label. Click on the image

- Lisez les informations de sécurité cliquez sur l'image

- Lea la etiqueta de información de seguridad. Haga clic en la imagen

- Lees het veiligheidsinformatie label. Klik op de afbeelding.

- Lesen Sie das Sicherheitsinformationsetikett. Klicken Sie auf das Bild.

PMC-770 products

  • PMC™-770 /1,36 kg

    Shore A70| Cure Time: 16H00

    43,67 EUR

  • PMC™-770 /10.89 kg

    Shore A70| Cure Time: 16H00

    256,28 EUR

PMC 780 WET

PMC-780 WET

PMC™-780 WET contains a built-in release agent to aid in demolding concrete.

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.

Shore 80A Hardness - mixed two parts A to one part B by weight -negligible shrinkage

PMC 780 Dry & Wet Safety Data Info

PMC 780 DRY

PMC-780 products

  • PMC™-780 WET/1,36 kg

    Shore A80| Cure Time: 48H00

    45,64 EUR

  • PMC™-780 WET /10,89 kg

    Shore A80| Cure Time: 48H00

    276,02 EUR

  • PMC™--780 WET /54,43 kg

    Shore A80| Cure Time: 48H00

    1.185,00 EUR

PMC-780 DRY

PMC®-780 Dry is also commonly used to make rubber mechanical parts of varying configurations (gaskets, wheels, pulleys) as well as ball mill liners and vibration/shock pads. PMC®-780 Dry does not exude an oil.

PMC®-780 is a premium performance urethane rubber that offers exceptional strength, durability and abrasion resistance.

Shore 80A hardness
mixed two parts A to one part B by weight
negligible shrinkage

PMC 790

PMC-780 products

  • PMC™-780 DRY/1,36 kg

    Shore A80| Cure Time: 48H00

    45,64 EUR

  • PMC™-780 DRY /10.89 kg

    Shore A80| Cure Time: 48H00

    276,02 EUR

PMC-790

PMC®-790 Urethane Rubber - PMC®-790 is an 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.PMC®-790 is suitable for a variety of industrial applications including making concrete stamping pads, mold liners and molds for casting concrete. PMC®-790 is also good for making ball mill liners, industrial rollers and belts, rubber mechanical parts.


Shore 90A hardness

PMC-790 products

  • PMC™-790 /1,36 kg

    Shore A90| Cure Time: 48H00

    41,13 EUR

  • PMC™-790 /10,89 kg

    Shore A90| Cure Time: 48H00

    251,04 EUR

PMC 790 Safety Data Info

Properties Table

PMC Properties Table

PMC A:B mixing ratio Demold Time Elongation at Break Mixed Viscosity Pot Life Shore A Hardness Tear Strength Specific Gravity kg/lt
744 2:1 weight/ volume 16 hrs 400 % 3400 cps 15 min 44 A 90 pli 1,000
746 2:1 weight/ volume 16 hrs 650 % 1200 cps 15 min 60 A 100 pli 1,000
770 2:1 by weight 16 hrs 600% 3000 cps 35 min 70 A 160 pli 1,015
780 2:1 weight/ volume 48 hrs 700% 2000 cps 25 min 80 A 200 pli 1,015
790 2:1 weight/ volume 48 hrs 600 % 3000 cps 20 min 90 A 300 pli 1,068
Video
Instructions

Preparation - Materials should be stored and used in at room 23C. Humidity should be low. These products have a limited shelf life and should be used as soon as possible. Wear safety glasses, long sleeves and rubber gloves to minimize contamination risk. Good ventilation (room size) is necessary.

Some Materials Must Be Sealed - To prevent adhesion between the rubber and model surface, models made of porous materials (gypsum plasters, concrete, wood, stone, etc.) must be sealed prior to applying a release agent. SuperSeal® or One Step® (available from Form X) are fast drying sealers suitable for sealing porous surfaces without interfering with surface detail. Shellac is suitable for rough contours. A high quality Shellac is suitable for sealing modeling clays that contain sulfur or moisture (water based). Thermoplastics (polystyrene) must also be sealed with shellac or PVA.

In all cases, the sealing agent should be applied and allowed to completely dry prior to applying a release agent.

Non-Porous Surfaces - Metal, glass, hard plastics, sulfur free clays, etc. require only a release agent.

Applying A Release Agent - A release agent is necessary to facilitate demolding when casting into or over most surfaces. Use a release agent made specifically for mold making (Universal® Mold Release). A liberal coat of release agent should be applied onto all surfaces that will contact the rubber.

IMPORTANT: To ensure thorough coverage, lightly brush the release agent with a soft brush over all surfaces of the model. Follow with a light mist coating and let dry for 30 minutes.

Because no two applications are quite the same, a small test application to determine suitability for your project is recommended if performance of this material is in question.

IMPORTANT: Shelf life of product is reduced after opening. Remaining product should be used as soon as possible. Immediately replacing the lids on both containers after dispensing product will help prolong the shelf life of the unused product. XTEND-IT® Dry Gas Blanket (available from form x) will significantly prolong the shelf life of unused liquid urethane products.

MEASURING & MIXING - Liquid urethanes are moisture sensitive and will absorb atmospheric moisture. Mixing tools and containers should be clean and made of metal, glass or plastic. Materials should be stored and used in a warm environment 23°C.

IMPORTANT: Pre Mix the Part B before using. After dispensing equal amounts of Parts A and B into mixing container, mix thoroughly for at least 3 minutes making sure that you scrape the sides and bottom of the mixing container several times.

If Mixing Large Quantities 7 kg. or more at one time, use a mechanical mixer (i.e. Squirrel Mixer or equal) for 3 minutes followed by careful hand mixing for one minute as directed above. Then, pour entire quantity into a new, clean mixing container and do it all over again.

Although this product is formulated to minimize air bubbles in the cured rubber, vacuum degassing will further reduce entrapped air. A pressure casting technique using a pressure chamber can yield totally bubble free castings. Contact Smooth-On or your distributor for further information about vacuum degassing or pressure casting.

Pouring - For best results, pour your mixture in a single spot at the lowest point of the containment field. Let the rubber seek its level up and over the model. A uniform flow will help minimize entrapped air. The liquid rubber should level off at least 1.3 cm over the highest point of the model surface.

Curing - Allow rubber to cure overnight (at least 16 hours) at room temperature 23°Cbefore demolding. Cure time can be reduced with mild heat or by adding Smooth-On “Kick-It®” Cure Accelerator. Do not cure rubber where temperature is less than 18°C.

Post Curing - After rubber has cured at room temperature, heating the rubber to 65°C for 4 to 8 hours will increase physical properties and performance.

Using The Mold - If using as a mold material, a release agent should be applied to the mold before each casting. The type of release agent to use depends on the material being cast. The proper release agent for wax, liquid rubber or thermosetting materials (i.e. Smooth-On liquid plastics) is a spray release made specifically for mold making (available from Smooth-On or your distributor). Prior to casting gypsum plaster materials, sponge the mold with a soap solution for better plaster flow and easy release. In & Out® II Water Based Release Concentrate (available from Smooth-On) is recommended for releasing abrasive materials like concrete.

Performance & Storage - Fully cured rubber is tough, durable and will perform if properly used and stored. The physical life of the rubber depends on how you use it. Shrinkage will be higher with wet vs. dry rubbers. Contact Smooth-On directly with questions about this material relative to your application.

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You might also need...

  • Mixing Beakers
  • Measuring Cups & Jars
  • Weighting devices
  • Brushes
  • Protective Gear such as gloves
  • Release agents
Mixing, Measuring & Weighting

Weighing, mixing and measuring

  • Measuring Cup 30ml

    Measuring Cup 30ml

    30ml + graduation more

    0,16 EUR*

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    Measuring cup 125ml

    125ml + graduation more

    0,40 EUR*

  • mixing/measuring cup 350ml

    mixing/measuring cup 350ml

    Mixing and measuring beaker with measuring indication - 350 ml more

    0,47 EUR*

  • mixing / measuring cup 700 ml

    mixing / measuring cup 700 ml

    Mixing and measuring beaker with measuring indication - 700 ml more

    0,52 EUR*

  • mixing / measuring cup 1400 ml

    mixing / measuring cup 1400 ml

    Mixing and measuring beaker with measuring indication - 1400 ml more

    0,66 EUR*

  • mixing / measuring cup 2300 ml

    mixing / measuring cup 2300 ml

    Mixing and measuring beaker with measuring indication - 2300 ml more

    1,21 EUR*

  • SO mixing cup  /473ml

    SO mixing cup /473ml

    SO mixing cup /16oz more

    0,86 EUR*

  • SO mixing cup  /946ml

    SO mixing cup /946ml

    SO mixing cup /32oz more

    0,90 EUR*

  • SO mixing cup  /1892ml

    SO mixing cup /1892ml

    SO mixing cup /64oz more

    2,35 EUR*

  • SO mixing cupr  /4880ml

    SO mixing cupr /4880ml

    SO mixing cupr /165oz more

    2,77 EUR*

  • Mixing beaker  round 500cc

    Mixing beaker round 500cc

    Mixing Beaker, Round, Polypropylene, 500 cc contents more

    0,21 EUR*

  • mixing beaker 1000cc

    mixing beaker 1000cc

    Plastic mixing beaker 1162 ml. more

    0,53 EUR*

  • Mixing Bowl 2000 ml

    Mixing Bowl 2000 ml

    180x180 mm; 2000 cc more

    0,75 EUR*

  • Flexible mixing cup 500ml

    Flexible mixing cup 500ml

    For gypsum, alginate etc. more

    6,65 EUR*

  • Flexible mixing cup 1750ml

    Flexible mixing cup 1750ml

    For gypsum, alginate etc. more

    15,98 EUR*

  • Syrenge 50ml

    Syrenge 50ml

    With catheter nozzle. more

    4,76 EUR*

  • Tongspatels

    Tongspatels

    Wooden tongue spatula more

    2,83 EUR*

  • stirring stick 22cm

    stirring stick 22cm

    220x17x3 mm more

    0,04 EUR*

  • stirring stick 30cm

    stirring stick 30cm

    30cm / price per piece more

    0,20 EUR*

  • Colad Turbomix  /per 200

    Colad Turbomix /per 200

    200 stirrers in dispenser. more

    50,73 EUR*

  • Turbine Mixer

    Turbine Mixer

    Use with electrical drill more

    13,31 EUR*

  • Tristar KW2430 Scale

    Tristar KW2430 Scale

    Weighs up to 2 kg more

    16,70 EUR*

  • GREEN MEENEE MIXER™

    GREEN MEENEE MIXER™

    more

    4,91 EUR*

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Brushes

Brushes

  • flat brush 30mm

    flat disposable brushes

    0,66 EUR

  • flat brush 40mm

    flat disposable brushes

    0,76 EUR

  • flat brush 50mm

    flat disposable brushes

    1,15 EUR

  • flat brush 60mm

    flat disposable brushes

    1,14 EUR

  • flat brush 70mm

    flat disposable brushes

    1,15 EUR

  • polyesterkwast 20mm

    polyester brush 20mm round

    2,55 EUR

  • polyesterkwast 25mm

    polyester brush 25mm round

    2,90 EUR

  • Polyesterkwast 35mm plat

    houten polyesterkwast 35mm plat

    1,83 EUR

  • Calupaint flat brush 40mm

    Calupaint flat brush professionel 40mm

    2,15 EUR

  • brush 40mm

    Brush, flat, 40mm, wooden handle.

    2,35 EUR

  • Polyesterkwast 50mm plat

    wooden polyester brush 50mm flat

    2,86 EUR

  • Polyester kwast plat 75mm

    Polyester brush, Flat, 75 mm

    2,75 EUR

Protective Gear

Protective Gear

  • Glove Nitrile S

    Glove Nitrile S

    9,10 EUR

  • Glove Nitrile L

    Glove Nitrile L

    9,10 EUR

  • Glove Nitrile M

    Glove Nitrile M

    9,10 EUR

  • Glove Nitrile XL

    Glove Nitrile XL

    9,10 EUR

  • Stenchmask carbon fibre

    Stenchmask carbon fibre

    4,47 EUR

  • Paint spray mask Colad

    Complet easy to wear paint spray mask.

    35,39 EUR

  • 3M 06941 Halfgelaatmasker

    FFA1P2D

    41,76 EUR

  • Filter ABEK1

    For 3M 6200 maskers

    30,47 EUR

  • 3M safety glasses Classic

    3M safety glasses Classic

    12,55 EUR

Release Agents

Release Agents

Spray Releases

  • Safety Info Acmos

  • Acmos 82 aerosol /400gr

    Removable universal release agent/ wax based / aerosol spraycan

    17,05 EUR

  • Ease Release™ 200 /340 gr

    Ease Release™ 200 /340 gr

    16,15 EUR

Spray Releases

Spray Releases

Guide

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The list below may help you find what you are looking for via an alternative path.

  • Molding

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  • Special Properties

  • Composites

    resins, poyester, epoxy, acrylic resin, glass fibres etc.

  • Foam

    expanding flexible and rigid foams, rigid blocks.

  • Restoration

    restoring in- and exterior ornaments and buildings.

  • Prototyping

    resins and other materials used for rapid prototyping.

  • Textile

  • Cosplay

    Products to make your own Cosplay Costumes and Props!

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