Patent ID: 6840990

Claim:
A composition for sealing at least one fluid leak in heat exchange systems, the composition comprising: at least one solvent; fibrillated fiber in an amount and of a size sufficient to become entrained in and seal the at least one leak; particulate material in an amount and of a size sufficient to coact with the fibrillated fiber to seal the at least one leak; at least one corrosion inhibitor in an amount sufficient to aid in prevention of corrosion of at least two metals wherein the at least one corrosion inhibitor is compatible with coolants having organic acid corrosion inhibiting agents therein, and with coolants having silicate corrosion inhibiting agents therein, wherein the at least one corrosion inhibitor is selected from the group consisting of alkali metal nitrates, azoles, modified azoles, and mixtures thereof; and at least on mineral-based material present in an amount sufficient to aid sealing the at least one leak, wherein the mineral-based material is a clay or clay analog select from the group consisting of bentonite, smectite, montmorillonite, paligorskite, attapulgite, sepiolite, saponite, kaolinite, halloysite, hectorite, beidellite, stevensite, fire clay, ground shale, mud, silt, and mixtures thereof; wherein a main component of the coolants having organic acid corrosion inhibiting agents therein and the coolants having silicate corrosion inhibiting agents therein is selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, glycerol, and mixtures thereof; and wherein the at least two metals are selected from the group consisting of steel, iron, iron alloys, aluminum, aluminum alloys, brass, brass alloys, copper, copper alloys, lead, lead alloys, and mixtures thereof.