Several embodiments of reactive biasing fasteners are described. The elastomers which exhibit improved stability to hydrolysis are characterized in that their preparation is carried out in the presence of at least one esters of monobasic carboxylic acid or polybasic carboxylic acids, the dissociation constant of which is 0. An inline flowmeter indicates an apparent recycle flow rate. A retrieval module receives a first equipment reference code at the mobile device and retrieves a first equipment procedure indexed to the first equipment reference code.