The testing of sealant samples has been restricted to devices that either focus on fatiguing multiple samples or quantifying the mechanical properties of a single sample. This manuscript describes a device that combines these two instrumental designs: the ability to both fatigue and characterize multiple sealant samples at the same time. This device employs precise movement capability combined with a stiff loading frame and accurate force measurement for the characterization of five ASTM C719

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... alant samples. The performance of this device is demonstrated by monitoring the changes in mechanical properties of silicone sealant during the first 90 h of cure. A complete description of the apparatus, results from the study of curing and analysis is included.