Elastic 50A Resin is a 50 Shore A durometer material is suitable for prototyping parts normally produced with silicone. Choose Elastic Resin for parts that will bend, stretch, compress, and hold up to repeated cycles without tearing. This resin is engineered to simulate the feel and performance of soft silicone materials and is used in various applications requiring flexibility, durability, and high tear strength.
Material Reference Data:
METRIC | ENGLISH | METHOD | |
Ultimate Tensile Strength | 3.23 MPa | 468 psi | ASTM D 412-06 (A) |
Stress at 50% Elongation | 0.94 MPa | 136 psi | ASTM D 412-06 (A) |
Stress at 100% Elongation | 1.59 MPa | 231 psi | ASTM D 412-06 (A) |
Elongation at Break | 160% | 160% | ASTM D 412-06 (A) |
Tear Strength | 19.1 kN/m | 109 lbf/in | ASTM D 624-00 |
Shore Hardness | 50A | 50A | ASTM 2240 |
Compression Set (23 °C for 22 hours) | 2% | 2% | ASTM D 395-03 (B) |
Compression Set (70 °C for 22 hours) | 9% | 9% | ASTM D 395-03 (B) |
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% | < 1 |
Acetone | 19.3 |
Bleach ~5% NaOCl | < 1 |
Butyl Acetate | 18.2 |
Diesel Fuel | 1.2 |
Diethyl glycol Monomethyl Ether | 12 |
Hydraulic Oil | < 1 |
Hydrogen peroxide (3%) | < 1 |
Isooctane (aka gasoline) | < 1 |
Isopropyl Alcohol | 13.3 |
Mineral oil (Light) | < 1 |
Mineral oil (Heavy) | < 1 |
Salt Water (3.5% NaCl) | < 1 |
Skydrol 5 | 9.9 |
Sodium Hydroxide solution (0.025% PH 10) | < 1 |
Strong Acid (HCl conc) | 14.2 |
Water | < 1 |
Xylene | 20.4 |
DOWNLOAD THE FULL MATERIAL DATA SHEET
These parts were left outside from July 2023 – February 2024 to see how this material would hole up to long term UV exposure and weathering (rain and snow), here are the results:
In conclusion this Elastic 50A material from Formlabs held up ok after 7 months out door weathering but with rough handling started to tear and break down.
We also set another copy of this part inside our building next to a window but not where it could get direct sunlight, it showed less over exposure (yellowing) and also was stronger and could be handled roughly without tearing:
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