SLA Material – Silicone 40A Resin

100% Silicone Material for Soft, Pliable, and Durable Parts

Silicone 40A Resin is the first accessible 100% silicone 3D printing material. Eliminate molding and labor-intensive casting processes and 3D print pure silicone parts.

With this 40A Shore durometer material, you can fabricate soft, pliable, and durable parts with a 230% elongation at break and a 12 kN/m tear strength that can withstand repeated cycles of stretching, flexing, and compression.

Combine the high performance of silicone and the design freedom of 3D printing to create highly functional silicone parts with excellent chemical and thermal resistance (-25°C to 125°C), fine features as small as 0.3 mm, and complex geometries that are not possible with traditional methods.

Common Applications:

• Seals, gaskets, grommets, connectors, and dampeners for automotive, robotics, and manufacturing.
• Customized prosthetics, orthotics, audiology models, and medical devices.
• Wearables, handles, and grippers for consumer products.
• Flexible fixtures, masking tools, and soft molds for casting urethane or resin.

Material Reference Data:

• For more information on how the SLA printing process works please check out this page.
• For SLA part design trick and tips check out this page.
• Material manufacturers website

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SLA: Silicone 40A Resin Material Properties Data:

	METRIC	ENGLISH	METHOD
Ultimate Tensile Strength	5 MPa	725 psi	ASTM D 412-06 (A)
Stress at 50% Elongation	0.4 MPa	58 psi	ASTM D 412-06 (A)
Stress at 100% Elongation	1 MPa	145 psi	ASTM D 412-06 (A)
Stress at 150% Elongation	2.1 MPa	305 psi	ASTM D 412-06 (A)
Elongation at Break	230%	230%	ASTM D 412-06 (A)
Tear Strength	12 kN/m	68 lbf/in	ASTM D 624-00
Shore Hardness	40A	40A	ASTM 2240
Compression Set (23 °C for 22 hours)	20%	20%	ASTM D 395-03 (B)
Bayshore Resilience	34%	34%	ASTM D2632
Ross Flexing Fatigue at 23 °C	500,000 cycles		ASTM D1052, (notched), 60° bending, 100 cycles/minute
Ross Flexing Fatigue at -10 °C	500,000 cycles		ASTM D1052, (notched), 60° bending, 100 cycles/minute
Glass Transition Temperature	-107 °C	-161 °F	ASTM D4065

SLA: Silicone 40A Resin Solvent Compatibility:

Percent weight gain over 24 hours for a printed and post-cured 1 x 1 x 1 cm cube immersed in respective solvent

Solvent	24 hr weight gain, %
Acetic Acid 5%	< 0.1
Acetone	11.5
Bleach ~5% NaOCl	< 0.1
Butyl Acetate	92.3
Diesel (Chevron #2)	32.9
Diethyl glycol Monomethyl Ether	2.5
Hydraulic Oil	10
Hydrogen peroxide (3%)	< 0.1
Gasoline (ISO 1817, liquid C)	69.8
Isopropyl Alcohol	5.9
Mineral oil (Light)	2
Mineral oil (Heavy)	1.6
Salt Water (3.5% NaCl)	< 0.1
Skydrol 5	23.2
Sodium Hydroxide solution (0.025% PH 10)	< 0.1
Distilled Water	< 0.1
Hydrochloric Acid (10%)	0.4

DOWNLOAD THE FULL MATERIAL DATA SHEET

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SLA: Silicone 40A Resin Part Gallery: