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...
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...
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....
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...
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...
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...
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...
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...
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
