Flexible PU rubber shore A 40–90 for molds and finished products Discover two-component polyurethane casting rubber (RTV PU rubber ) for flexible molds and finished products. Fast curing, low viscosity , high wear resistance, and a choice of Shore A grades 40 to 90 for precisely the right flexibility. Ideal...
Polyurethane Casting Rubber (PU Rubber)
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PolytekPT Flex 85
€39,95€33,02
PLEASE NOTE: since August 2023, polyurethane with a diisocyanate content of more than 0.1% may only be used in companies where employees have completed the required courses. Companies can register for online training via THIS link. You can also read...
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AltropolPolyurethane Casting Resin A75 Flexible Kit
€20,95€17,31
PLEASE NOTE: since August 2023, polyurethane with a diisocyanate content of more than 0.1% may only be used in companies where employees have completed the required courses. Companies can register for online training via THIS link. You can also read more information here....
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PolytekPT Flex 60
€46,20€38,18
PLEASE NOTE: since August 2023, polyurethane with a diisocyanate content of more than 0.1% may only be used in companies where employees have completed the required courses. Companies can register for online training via THIS link. You can also read...
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Huismerk - SAMPolyurethane Casting Resin Flexible A40
€29,95€24,75
PLEASE NOTE: since August 2023, polyurethane with a diisocyanate content of more than 0.1% may only be used in companies where employees have completed the required courses. Companies can register for online training via THIS link. You can also read...
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Huismerk - SAMPolyurethane Casting Resin Flexible A60
€25,95€21,45
PLEASE NOTE: since August 2023, polyurethane with a diisocyanate content of more than 0.1% may only be used in companies where employees have completed the required courses. Companies can register for online training via THIS link. You can also read...
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PolytekPT Flex 97
€38,50€31,82
LET OP: sinds augustus 2023 mag polyurethaan met een diisocyanaat aandeel van meer dan 0,1% alleen in bedrijven gebruikt worden waar medewerkers de vereiste cursussen hebben gevolgd. Bedrijven kunnen zich aanmelden voor een online training via DEZE link. Meer...
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PolytekPT Flex 50
€39,95€33,02
PLEASE NOTE: since August 2023, polyurethane with a diisocyanate content of more than 0.1% may only be used in companies where employees have completed the required courses. Companies can register for online training via THIS link. You can also read...
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Huismerk - SAMPolyurethane Casting System Flexible A20
€29,95€24,75
PLEASE NOTE: Since August 2023, polyurethane with a diisocyanate content of more than 0.1% may only be used in companies where employees have completed the required training courses. Companies can register for an online training via THIS link. You can...
Flexible PU rubber shore A 40–90 for molds and finished products
Discover two-component polyurethane casting rubber (RTV PU rubber ) for flexible molds and finished products. Fast curing, low viscosity , high wear resistance, and a choice of Shore A grades 40 to 90 for precisely the right flexibility. Ideal for wear-resistant molds, transport components, and functional rubber products.
⚠️ Please note (Diisocyanates & Training)
Since August 2023, polyurethane with a diisocyanate content > 0.1% may only be processed by companies whose employees have completed the required training. Ensure proper training/certification before starting, in accordance with EU regulations.
Why choose PU Casting Rubber (Shore A 40–90)?
- ✓ Highly wear-resistant: long service life in production and mold use
- ✓ High tensile & compression strength: performs under load
- ✓ Variable hardness: Shore A 40–90 for every application
- ✓ Chemical resistance: resistant to oil, petrol and lubricants
- ✓ RTV processing: curing at room temperature, quick to dismantle
Applications: molds, transport & end products
Making PU rubber mold
- Wear-resistant molds for concrete, plaster and industrial use
- High level of detail due to low viscosity
Transport & automotive
- Forklift tires, conveyor belt parts (often with reinforcement)
- Damper blocks and engine mounts – oil/petrol resistant
Creative & end products
- Flexible figures, replicas and decorative parts
- Functional parts with rubber-like performance
Which Shore A do you choose? (40/60/75/85/90)
| Shore A | Characteristic | Typical Bet |
|---|---|---|
| ~40 | Flexible, bendable | Detail molds, soft parts |
| ~60 | All-round elastic | Molds with higher wear, damping |
| ~75 | Firm rubber | Smaller production parts, inserts |
| ~85–90 | Hard rubber, very wear resistant | Industrial rubbers, technical parts |
Assortment of PU Casting Rubber (RTV Urethane Rubber)
PT Flex 60 – Shore A 60 (RTV)
Fast PU rubber with versatile Shore A 60 for molds and production parts. Low viscosity for fine detail and easy disassembly.
- Applications: props, tools, models
- Advantages: fast curing, good wear resistance
PT Flex 85 – Shore A 85 (RTV)
High wear resistance and dimensional stability for demanding end products. Ideal for heavy-duty rubber work and small series.
- Applications: production parts, damper blocks, models
- Advantages: quick disassembly, high mechanical values
PU Casting System A75 – Shore A ~75
Shore A ~75 for strong, flexible castings. Easy-to-use 2K system; suitable for small to medium-sized parts.
- Applications: molds, replicas, prototypes
- Advantages: ease of use, consistent results
PU Casting System A40 – Shore A ~40
Shore A ~40 for soft, detailed parts and molds. Good machinability and clean ventilation.
- Applications: flexible figures, detail molds
- Advantages: flexible, good detail transfer
Processing tips for 2-component PU Rubber
- → Work dry and clean: keep the surface and tools free of grease; avoid moisture for optimal curing.
- → Precise mixing: weigh components precisely and mix homogeneously; respect pot life
- Pouring & Venting: Pour gently (vacuum if necessary); use suitable release agents
- → Resistance: PU is generally more wear-resistant than silicone, but more sensitive to UV/heat; choose a finish/coating if necessary
- → Safety: PPE, ventilation and diisocyanate training required where applicable
FAQ - Polyurethane Casting Rubber (PU Rubber)
What is RTV polyurethane rubber?
A room-temperature vulcanizing 2K PU system that cures at room temperature to form a flexible rubber. Ideal for molds and finished products without an oven.
When do I choose PU rubber instead of silicone?
For wear-resistant molds and components, or where oil/petrol resistance is required. Keep in mind the UV/temperature sensitivity of PU.
Which Shore A rating do I need?
For soft molds, choose A40–A60; for stronger, wear-resistant parts, choose A75–A90. See the hardness chart above for specific applications.
Advice & Order
Are you unsure whether to choose Shore A 40, 60, 75, or 85 ? We're happy to help with selection, processing, and compatibility with your application.
High-quality flexible polyurethane rubber
Discover our professional two-component polyurethane systems for producing flexible rubber with superior properties. These PU rubbers are ideal for both molds and finished products .
NXTlvl made this flexible dragon (Dragan Duma) with PT Flex 85