System and method of sealing process leaks

A method of sealing leaks in process pipe walls comprising;

• providing a solid nitrile rubber sealant composition in an injection gun connected to an enclosed cavity formed by a recess in a clamp and the pipe wall, the clamp having at least two injection ports, surrounding a process pipe surface having a leak, liquidifying the solid nitrile rubber sealant composition by application of pressure, injecting the sealant so liquidified into the enclosed cavity and curing the sealant composition at a temperature at least about 80° C. to form a solid seal around the process pipe, wherein the clamp is shaped to fit around a pipe, the clamp having a top side and underside with an underside surface, edges and tabs extending downward from edges of the underside surface that will contact a pipe wall when in use wherein the clamp that surrounds a leak site in a pipe has a cavity on the underside of the clamp that when placed against the wall of a leaking pipe defines an enclosed space that forms a mold for a delayed curing sealant and that has at least two ports into which a delayed cure sealant can be injected and wherein pressure is applied with an injection gun having at one end an injection port capable of mating with the clamp ports, and an open port in the injection gun;
• a piston chamber and piston, the piston sized to project past the open port and having a spring disposed in the chamber in a manner that it is compressed when the piston is moved forward by hydraulic pressure toward the injection gun and that expands to return the piston to its starting position when hydraulic pressure is released;
• a conduit connection means at the end of the injection gun opposite the injection port;
• and
• a conduit between the injection gun piston chamber;
• and
• a hand operated hydraulic pump for providing pressure on the piston of the piston chamber to move the piston towards the injection gun.