The Top Chinese Vacuum Casting Partner

We Offer a Variety of Vacuum Casting Materials

Vacuum casting—production-grade parts in days. No mold cost. No long waits.

Materials match ABS, PC, PP, Rubber-Like (Shore A 20–90), PA (Nylon)-Like & Glass-Filled，high-temp, UL94 V-0, and FDA-grade. Custom finishing available.

Why does material selection matter so much for custom parts?

Choosing the right material for custom parts is critical because it directly impacts performance, cost, manufacturability, and longevity.

Mechanical & Physical Properties

Strength, hardness, flexibility, weight, thermal resistance, and conductivity all depend on material. The wrong choice can lead to premature failure or poor functionality.

Application Environment

Will the part face high temperatures, corrosive chemicals, moisture, UV exposure, or heavy wear? Materials must be selected to withstand real-world conditions.

Manufacturing Compatibility

Not all materials work well with every process. The right material ensures efficient production with fewer defects.

Cost & Lead Time

Material cost varies widely. Over-specifying (e.g., using titanium where aluminum works) drives up expense. The right balance saves money without sacrificing quality.

Surface Finish & Aesthetics

Some materials polish better, take paint or anodizing more easily, or have natural color/texture. This matters for visual or consumer-facing parts.

Regulatory & Safety Requirements

Medical, aerospace, and food-contact parts must meet specific standards (e.g., FDA, ISO, RoHS). The right material ensures compliance.

Custom Vacuum Casting Parts with More than 20+ Materials

Provide Various Materials of Vacuum Casting One-Stop Services for Different Industries.Vacuum Casting or Urethane Casting material is not a regular plastic or rubber silicone material. They belong to a type of plastic-like or rubber-like material, which simulate by two‑component polyurethane (PU/urethane) resins.

Vacuum Casting Materials: ABS like material, PC like material, PMMA like material, PP like material, RUBBER/SILICONE,POM like material, PA like material, PA+Glassfibre,TPU like material

Vacuum Casting ABS Like Material Features

Type	Feature	Color	Tensile strength	Flexural strength	Flexural modulus	Impact strength	Elongation	Shrink Rate	Heat deflection temp℃
Hei-Cast 8150	Excellent physical properties, fast curing speed, good fluidity, mostly used for shell manufacturing.	black/white/cream white	740Kg/cm2	1790Kg/cm2	18300Kg/cm2	12-15Kg/cm2	16%	0.30%	100
Hei-Cast 8158	Excellent physical properties, fast curing speed, good fluidity, mostly used for shell manufacturing.	black/white/cream white	30-60Mpa	80Mpa	2000-2200Mpa	12-14kJ/m2	5-15%	0.26-0.3%	90
PX-223	Low viscosity, impact resistance, high temperature resistance, corrosion resistance.	black	60Mpa	80Mpa	2300Mpa	＞60kJ/m2	11%	4%	120
Hei-Cast 8263	Flame-retardant material UL94-V0 (the highest-level flame retardant certification for injection molding resins).	black/white	68Mpa	93Mpa	2200Mpa	10kJ/m2	15%	0.003	80
3118	similar to ordinary ABS features	black/white	45Mpa	70Mpa	1700Mpa	35kJ/m2	10%	2%	80
UP 6160	Withstands high temperatures up to 200°C, high replication accuracy, easy to color	Tranparent with light yellow	59-69Mpa	108-128Mpa	2100-2200Mpa	34-44J/m	15-16%	0.7-0.9%	190
MU55	Good impact resistance, the product does not become brittle even used in winter.	black/white/cream white	/	96Mpa	2100Mpa	16kJ/m2	无	0.30%	93

Vacuum Casting PC Like Material Features

Type	Feature	Color	Tensile strength	Flexural strength	Flexural modulus	Impact strength notched Izod,	Elongation at break	Shrink Rate	Heat deflection temperature ℃
PX-700	Good transparency, low shrinkage.	Tranparent	40 MPa	90 MPa	1800 MPa	18KJ/m2	10%	0.50%	60
PX520	Good transparency, low shrinkage.	Tranparent	50 MPa	100 MPa	2000 MPa	20 KJ/m2	10%	0.50%	70

Vacuum Casting PMMA Like Material Features

Type	Feature	Color	Tensile strength	Flexural strength	Flexural modulus	Impact strength notched Izod,	Elongation at break	Shrink Rate	Heat deflection temperature ℃
UPX 5210	High transparency, easy to polish, good UV resistance, good thermal stability, and high replication accuracy	Tranparent	65-70Mpa	90-95Mpa	2000-2200Mpa	80-90KJ/m2	15-20%	0.4-0.45%	70-90
Z1940	Good fluidity, non-yellowing, corrosion protection, UV resistance,suitable for automotive light manufacturing	Tranparent	60Mpa	80Mpa	2000 MPa	10kJ/m2	30%	0.30%	/

Vacuum Casting PP Like Material Features

Type	Feature	Color	Tensile strength	Flexural strength	Flexural modulus	Impact strength notched Izod,	Elongation at break	Shrink Rate	Heat deflection temperature ℃	Density
UP 5690	The hardness is adjustable, it releases from the mold quickly, has high elongation, is not prone to breakage, and offers high strength	black/white	25-35Mpa	20-50Mpa	600-1300Mpa	75-100kJ/m2	50-90%	0.35%	/	1.13

Vacuum Casting RUBBER/SILICONE Like Material Features

Type	Feature	Color	Tensile strength	Flexural strength	Flexural modulus	Impact strength notched Izod,	Elongation at break	Shrink Rate	Heat deflection temperature ℃	Density
Hei-Cast 8400	Low viscosity, very good fluidity, fast curing, good elasticity. The hardness is adjustable; professional paint is required for spray painting	black/white	1.5-18Mpa	/	/	/	200-490%	0.4-0.6%	Placed in a 120°C hot air circulating constant for 100 hours, no change occurs except for temperature fluctuations within 30°C.	1.03-1.13
MU-89	The hardness is adjustable from 20A-90A	black/white	17Mpa				270%			1.12
T0387	Good transparency, adjustable hardness, not suitable for spray painting	Tranparent	1.5-40Mpa				260-300%			1.15

Vacuum Casting PA Like Material Features

Type	Feature	Color	Tensile strength	Flexural strength	Flexural modulus	Impact strength notched Izod,	Elongation at break	Shrink Rate	Heat deflection temperature ℃	Density
2180	Ultra-high heat resistance up to 135°C, high hardness of 87D, extremely low shrinkage of 0.2%, corrosion resistance, acid and alkali resistance, and high abrasion resistance	black	60Mpa	92Mpa	1950Mpa	17kJ/m2	12%	0.20%	135	1.27

Vacuum Casting POM Like Material Features

Type	Feature	Color	Tensile strength	Flexural strength	Flexural modulus	Impact strength notched Izod,	Elongation at break	Shrink Rate	Heat deflection temperature ℃	Density
XU-50	Ultra-high heat resistance up to 150°C, high hardness of 87D, extremely low shrinkage of 0.2%	black/white	54Mpa	87Mpa	1900Mpa	13kJ/m2	15%	0.20%	145	1.22

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FAQs About Vacuum Casting Materials

What are the most commonly used materials for vacuum casting?

The mainstream materials are two‑component polyurethane (PU/urethane) resins. They can simulate the performance of many thermoplastics including ABS, PP, PC, PMMA, PA, soft TPE / TPU‑like rubber. Epoxy resin is occasionally used for high‑strength rigid parts. Wanna get Vacuum casting material support? Contact our team: engineer@rpdmfg.com.

What factors should I consider when selecting vacuum casting materials?

We suggest you consider: required hardness & flexibility, functional loading / impact requirement, transparency, heat resistance, painting / bonding needs, environmental exposure, part wall thickness, and target batch size. Always match material to your end‑use scenario instead of injection material name.

What are the main limitations of vacuum casting urethane materials?

Limited batch size (silicone mold typically lasts 10‑30 shots). In our plant, we just make 10-15 shots to insure the Vacuum casting parts quality. UV aging/yellowing risk for non‑UV‑stable resins, inferior long‑term creep performance versus real thermoplastics. Vacuum casting fits NPI prototyping and low‑volume runs, not suit for mass manufacturing.

What kind of quality assurance or warranty do you offer on orders?

One of the reasons engineers purchase from RPD is that we take on all the risks for you. We guarantee you’ll love what you get. Not happy with it? We’ll either redo it or give you a full refund. Your purchase is completely risk-free.

Can vacuum casting produce flexible rubber parts like TPU / TPE?

Absolutely. Low‑shore urethane elastomers simulate TPE/TPU.

Which kind of file formats can I send for tooling& production?

We accept STEP, IGES, STL, DWG, DXF, and other common CAD formats.

What temperature resistance can vacuum casting PU materials achieve?

Standard general‑purpose urethanes: ~60‑70 °C continuous use. High‑temp modified grades can reach 100‑180 °C.

Does Vacuum casting suit for bulk production?

No, it don’t suit for mass production. It can’t instead of injection molding, we suggest use for order smaller than 200 pcs. Exceed of 200pcs, we suggest you use rapid molding or other process.

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