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Blocking a channel with expanding polyurethane foam: Percent fluid diversion as a function of elapsed time. When the foam mixture was allowed to expand and cure for ≥12 min, 100% fluid diversion was observed. n = 4 attempted closures per time point. Note: When curing time > 11 min, the error bars are quite small and are not readily visible at 12- and 14-min time points.
