Repairing material for liquid leakage, repairing method for liquid leakage, and pipeline

A liquid leakage repair material, comprising:

• an inorganic filler in an amount of 20% by mass or greater but 95% by mass or less;
• and
• a curable composition that includes a monofunctional (meth) acrylate represented by General Formula (1) below;
• a multifunctional (meth) acrylate;
• and a radical initiator,
• where in General Formula (1), R1 represents a hydrogen atom or a methyl group, and R2 represents an organic group containing four or more carbon atoms,
• wherein the target liquid to be prevented from leakage by the liquid leakage repair material is an oil,
• wherein an oil absorption rate of the liquid leakage repair material after being cured is lower than 10%, as determined by filling the liquid leakage repair material in a mold formed of a silicone resin and having a size of 10 mm ×10 mm and a depth of 5 mm and by covering the surface of the liquid leakage repair material with releasable polyethylene terephthalate (PET) having a thickness of 50 micrometers, and, in this state, by curing the liquid leakage repair material by irradiation using a metal halide lamp until an integrated light quantity of 3 J/cm2 at 365 nm, to produce a cured product and by taking the cured product out from the mold and by measuring the weight of the cured product as a weight before liquid absorption and the weight of the cured product being left to stand at 25° C. for 24 hours as a weight after liquid absorption, the oil absorption rate being calculated according to a formula:
• oil absorption rate (%)=100×(weight after liquid absorption-weight before liquid absorption)/(weight before liquid absorption).