Spectroplast® TrueSil

Flexible Plastics

FlexibleBiomedicalHeat resistantChemical resistant

Spectroplast TrueSil is an industrial-grade, 3D-printable LSR (liquid silicone rubber) known for its exceptional flexibility, biocompatibility, and long-term durability. Unlike thermoplastic elastomers (TPE or TPU), TrueSil elastomers are made of 100% pure silicone and fulfill market standards in terms of performance and surface quality. They maintain stable mechanical properties across a wide temperature range from -50 °C to +200 °C. The material provides excellent elongation at break, rebound elasticity, and resistance to UV, ozone, and aging. TrueSil is certified for skin and food contact applications (ISO 10993 and USP Class VI), making it suitable for both medical and consumer-grade products. It's frequently used for seals, gaskets, cushioning components, wearable devices, prosthetics, and other parts requiring soft-touch functionality and repeated deformation.

Print with Spectroplast® TrueSil

Mechanical Properties

Tensile strength5–11 MPa

Tensile modulus0.24–1.5 MPa

Elongation150–1000 %

Flexural strength15–25 MPa

Density1.1 g/cm³

Thermal

Heat deflection at 66 PSI180–200 °C

Print Constraints

Maximum build volume

130 × 70 × 100 mm

Default layer height0.05 mm

Default infill100%

Min embossing0.5 mm

Min engraving0.5 mm

Accuracy± 0.3 mm

Warping riskN/A

Interlocking partsSupported

Available finishes

Each finish can be combined with the available colors at checkout.

TrueSil A20

1 color

TrueSil A20 is the softest silicone in the family, ideal for cushioning, wearables, and skin-contact parts. Its Shore A 20 hardness offers excellent elasticity and deformation tolerance.

TrueSil A35

1 color

TrueSil A35 offers balanced flexibility and strength with Shore A 35 hardness – ideal for grips, housings, and soft seals that need durability without losing compliance.

TrueSil A50

1 color

TrueSil A50 delivers firmer, more resilient silicone performance for seals, dampers, and connectors, combining durability with reliable elastic recovery.

TrueSil A60

2 colors

TrueSil A60 is the firmest grade, ideal for rigid seals, spacers, and parts requiring maximum shape retention and resistance to compression.

All materials

Spectroplast® TrueSil

Flexible Plastics

FlexibleBiomedicalHeat resistantChemical resistant

Print with Spectroplast® TrueSil

Mechanical Properties

Tensile strength5–11 MPa

Tensile modulus0.24–1.5 MPa

Elongation150–1000 %

Flexural strength15–25 MPa

Density1.1 g/cm³

Thermal

Heat deflection at 66 PSI180–200 °C

Print Constraints

Maximum build volume

130 × 70 × 100 mm

Default layer height0.05 mm

Default infill100%

Min embossing0.5 mm

Min engraving0.5 mm

Accuracy± 0.3 mm

Warping riskN/A

Interlocking partsSupported

Available finishes

Each finish can be combined with the available colors at checkout.

TrueSil A20

1 color

TrueSil A20 is the softest silicone in the family, ideal for cushioning, wearables, and skin-contact parts. Its Shore A 20 hardness offers excellent elasticity and deformation tolerance.

TrueSil A35

1 color

TrueSil A35 offers balanced flexibility and strength with Shore A 35 hardness – ideal for grips, housings, and soft seals that need durability without losing compliance.

TrueSil A50

1 color

TrueSil A50 delivers firmer, more resilient silicone performance for seals, dampers, and connectors, combining durability with reliable elastic recovery.

TrueSil A60

2 colors

TrueSil A60 is the firmest grade, ideal for rigid seals, spacers, and parts requiring maximum shape retention and resistance to compression.

All materials