Seals and bellows
Bushings and bellows to validate bending and assembly according to polyurethane.
Vacuum casting · Custom parts
Vacuum casting
of flexible PU.
Tactile feel, flexibility, and product texture. We manufacture flexible polyurethane parts for pre-production runs, including handles, push buttons, and protectors.
Get your quoteQuote in 24 h · Engineering review
- Manufacturing
- Pre-production runs in silicone molds
- Delivery from
- 10 working days
- Material
- PU Vacuum casting
01 / Why choose this material
Properties and uses
of flexible PU.
Elastic polyurethane for casting pre-production runs with product-like tactile feel, color, and texture. The formulation allows adapting hardness to the desired behavior.
Flexible PU is reproduced in silicone molds via vacuum casting. The polyurethane resin is selected to achieve the desired elastic behavior. Material hardness and geometry work together: two different wall thicknesses do not flex equally.
Learn about the vacuum casting process ↗Flexible PU properties
Properties according to the selected flexible formulation
- Indicative density
- 0,98–1,17 g/cm³
- Shore A hardness
- According to formulation
- Shape recovery
- Elastic
- Behavior
- Flexible
- Presentation
- Casting polyurethane
Catalog indicative density. Hardness, tensile strength, tear resistance, and temperature must be confirmed for the selected flexible resin. The old website PDF identifies DPI 8150 with 82 Shore D hardness; its values do not transfer to this flexible family.
Material datasheets
- Flexible
- Product appearance
- Reproduces mold textures
- Hardness according to polyurethane
Flexible PU applications
Grips
Grips that replicate the texture and feel of the product.
Push buttons and protectors
Push buttons and protectors with defined deformation.
Pre-production runs of products
Pre-production runs of elastic parts for presentation and testing.
02 / A choice based on usage
Choose flexible PU
based on your part.
These criteria help define the material, geometry, and working conditions before manufacturing.
01
Hardness and deformation
Specify the target hardness and how the part should flex. If possible, provide a reference for feel or function.
02
Color and texture
The pigmentation and mold surface allow approximating the appearance of the pre-production product.
03
Oils and temperature
Confirm the agents and usage conditions. Chemical resistance or tear strength depends on the formulation.
The part's function is the starting point.
Indicate loads, temperature, environment, and appearance needed. If the drawing requires a specific grade, include it in the request.
03 / Finishing also counts
Finishes and appearance
of flexible PU.
Define visible surfaces and the required result for your part. Requested treatments are included in the quote.
The surface reproduces the mold finish. Polyurethane resin, the pattern, and curing determine the final appearance.
The image could not be loaded. Try a different finish.
Reference images: material, geometry, and surface preparation influence the outcome. Special finishes are quoted upon request.
04 / From design to quote
Vacuum casting
of flexible PU.
Flexible PU manufacturing starts with a pattern that defines the shape and texture. From it, the silicone mold is prepared, vacuum casting is performed, and the polyurethane resin is cured before extracting and finishing the part.
Send a 3D model per part in STEP or a native supported format: SLDPRT, X_T, X_B, IPT, CATPART, PRT, SAT, or 3DM. Attach a PDF drawing for threads, inserts, or specific tolerances. STL is accepted only for 3D printing.
Upload your file and request a quotePart tolerances
Polyurethane resin, the pattern, the mold, and shrinkage during curing influence the dimensions. Attach functional dimensions to confirm feasibility; CNC machining tolerances should not be transferred directly.
Runs and molds
The pattern and mold are distributed among the pre-production parts. Geometry, polyurethane resin, and mold life condition the quantity and cost.
Quote in 24 hours
Parts from 10 working days after confirming the order. The quote specifies the lead time based on geometry, material, finish, and quantity.
How much it costs to manufacture
Get a quote for your part
in flexible PU.
The price of a flexible PU part includes pattern preparation, the mold, polyurethane resin, and casting. Quantity and finishes determine how the pre-production cost is distributed.
Check the catalog example to compare materials. To know the cost of your design, request a quote with your 3D file.
Frequently asked questions
Before casting
in flexible PU.
Properties, applications, and manufacturing: answers to prepare your request.
What is flexible PU and what properties does it have?
Elastic casting polyurethane for pre-production runs with product-like feel, color, and texture. The formulation allows adapting hardness to the desired behavior. Catalog reference density. Hardness, tensile strength, tear resistance, and temperature must be confirmed for the selected flexible resin. The old website PDF identifies DPI 8150 with 82 Shore D hardness; its values do not transfer to this flexible family.
What parts can be made in flexible PU?
You can manufacture gaskets and bellows, grips, buttons, and protectors, product pre-production runs. Vacuum casting in silicone molds allows repeating shapes and textures for a pre-production run. Define loads, environment, and finish so we can review the application.
Can I choose the hardness of a flexible PU casting part?
You can indicate the target hardness to select an appropriate polyurethane resin. Final flexibility also depends on wall thickness and shape. Define the stroke, load, and expected feel to review the part behavior.
Can flexible PU have a finished product appearance?
Yes. Casting allows reproducing mold textures and using compatible pigmentation. It is an option for pre-production grips, buttons, and protectors where feel and appearance matter. Color and texture must be specified in the quote.
Does any flexible PU resist oils and chemicals?
No. Resistance to oils, solvents, heat, and tear varies by polyurethane resin. Provide contact agents and exposure conditions to confirm the formulation. Universal resistance to flexible polyurethane should not be assumed.
How much does it cost to cast a flexible PU part?
The price of a flexible PU part includes pattern preparation, the mold, polyurethane resin, and casting. Quantity and finishes determine how the pre-production cost is distributed. Upload the 3D file to the Proto&Go! platform to receive a quote with cost and lead time.
What tolerances can I request for a flexible PU part?
Polyurethane resin, the pattern, the mold, and shrinkage during curing influence the dimensions. Attach functional dimensions to confirm feasibility; CNC machining tolerances should not be transferred directly.
What file do I need to manufacture a flexible PU part?
Send a 3D model per part in STEP or a native supported format: SLDPRT, X_T, X_B, IPT, CATPART, PRT, SAT, or 3DM. Attach a PDF drawing for threads, inserts, or specific tolerances. STL is accepted only for 3D printing.
Compare before choosing
Other options for your part.
Your next part
Shape it
in flexible PU.
Upload the 3D file. We review feasibility and send you the quote.