Rubber vs. SLA Resin Tough 2000

Compare Rubber vs. SLA Resin Tough 2000 strength, stiffness, weight and thermal properties.

RubberBulk polymer (molded or machined)

SLA Resin Tough 20003D printed (SLA resin)

Mechanical	Rubber	SLA Resin Tough 2000
Yield strength	not given (tensile used)	40.4MPa1
Ultimate tensile strength	23MPa2	40.4MPa11.76x stronger
Flexural strength	not sourced	67MPa1
Elongation at break	830%210.5x more ductile	79%1
Young's modulus (stiffness)	not sourced	1.8GPa1
Density	960kg/m³214% lighter	1,090kg/m³1
Strength to weight	24kN·m/kg	37.1kN·m/kg1.55x higher
Stiffness to weight	not sourced	1.65MN·m/kg
Poisson's ratio	government0.53	not sourced
Shear modulus	not sourced	not sourced
Bulk modulus	not sourced	not sourced
Speed of sound	not sourced	1,285m/s

Stiffness against densityHigher and further left: stiffer for its weight

Strength against densityHigher and further left: stronger for its weight

Thermal	Rubber	SLA Resin Tough 2000
Thermal conductivity	0.151W/m·K4	not sourced
Thermal expansion	not sourced	mean 0-150 °C134µm/m·K1
100 mm part over a 50 °C swing	not sourced	671µm growth
Specific heat	government1,881J/kg·K3	not sourced
Heats up and cools (diffusivity)	0.0836mm²/s	not sourced
Thermal shock resistance	not sourced	not sourced
Glass transition	not sourced	DMA112°C1
Max service temperature	70°C2	HDT 1.8 MPa57°C1

Thermal conductivity against densityHigher and further left: spreads more heat for its weight

Thermal expansion against thermal conductivityLower and further right: warps less when heated

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Sources4 documents: Formlabs, Weir Minerals, National Institute of Standards and Technology, Defense Technical Information Center

Rubber: Weir Minerals Linatex Premium rubber (95 % natural rubber), typical physical properties, spec sheet WMD0118/202305
SLA Resin Tough 2000: Formlabs Tough 2000 Resin V2 (FLTO2002), TDS Rev. 01 10/06/2025; printed on Form 4 at 100 µm, washed in Form Wash V2 10+5 min in >=99% IPA, post-cured 70 °C for 12 min in Form Cure V2. Orientation not stated.

1
Tough 2000 Resin V2 Technical Data Sheet (2025)Formlabsarchived copySLA Resin Tough 2000 · Yield strength: typicalSLA Resin Tough 2000 · Ultimate tensile strength: typicalSLA Resin Tough 2000 · Flexural strength: typicalSLA Resin Tough 2000 · Elongation at break: typicalSLA Resin Tough 2000 · Young's modulus (stiffness): typicalSLA Resin Tough 2000 · Density: typicalSLA Resin Tough 2000 · Thermal expansion: mean 0-150 °CSLA Resin Tough 2000 · Glass transition: DMASLA Resin Tough 2000 · Max service temperature: HDT 1.8 MPa
2
Linatex Premium Rubber Spec Sheet (WMD0118, 2023)Weir MineralsRubber · Ultimate tensile strength: typicalRubber · Elongation at break: typicalRubber · Density: typical (specific gravity)Rubber · Max service temperature: continuous use operating range
3
Compressibility of Natural Rubber at Pressures Below 500 kg/cm², J. Res. NBS 68A (1964)National Institute of Standards and Technologyarchived copyRubber · Poisson's ratio: government (NBS J. Res. 68A, 1964): computed by NBS for peroxide-cured gum NR vulcanizate, 25 °C, infinitesimal deformation (0.49 in the solver: the linear element locks as the ratio nears 0.5 (nearly incompressible).)Rubber · Specific heat: government (NBS J. Res. 68A, Table 7; values observed for unvulcanized NR by Bekkedahl and Matheson), 25 °C
4
Thermal Conductivity of Soft Vulcanized Natural Rubber: Selected Values (AD 643325)Defense Technical Information Centerarchived copyRubber · Thermal conductivity: government selected value (US Army Natick Laboratories TR 66-49-PR, 1966), soft vulcanized natural rubber, 25 °C

Each number points to the document that states it, with the exact basis. Values without a number are computed from the sourced ones. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.

SLA Resin Tough 2000 is 3D printed: its properties depend on build direction and print settings; these are typical values.

Questions

Mechanical

Is Rubber stronger than SLA Resin Tough 2000?

SLA Resin Tough 2000 is stronger: its yield strength is 40.4 MPa against tensile strength 23 MPa for Rubber (1.76x).

Which is lighter, Rubber or SLA Resin Tough 2000?

Rubber is lighter: 960 kg/m³ against 1,090 kg/m³ for SLA Resin Tough 2000.

Which is lighter for the same job, Rubber or SLA Resin Tough 2000?

For the same stiffness or strength: SLA Resin Tough 2000 is lighter for a strong rod or tie, strong beam, strong panel or plate.

Part that must be	Rubber	SLA Resin Tough 2000
Strong rod or tie	1.55x heavier	lighter
Strong beam	28% heavier	lighter
Strong panel or plate	17% heavier	lighter

For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).

Which is more ductile, Rubber or SLA Resin Tough 2000?

Rubber stretches further before it breaks: 830% elongation at break against 79% for SLA Resin Tough 2000.