Methods and systems for cleaning, coating and sealing leaks in existing nonmetal pipes, in a single operation. A nonmetal piping system can be cleaned in one pass by dry particulates forced and pulled by air throughout the piping system by a generator and a vacuum. Nonmetal pipes with nonmetal fittings or nonmetal pipes with metal fittings or nonmetal pipes with a combination of metal and nonmetal fittings can be protected from wear by water erosion and rupturing, extending the life of pipes made of a nonmetal material selected from at least one of plastics, PVC (polyvinyl chloride), composite materials, or polybutylene. Coatings can be applied to nonmetal pipes having diameters up to approximately 6. Leak sealants of at least approximately 4 mils thick can cover insides of nonmetal pipes, and can include novel mixtures of fillers and epoxy materials, and viscosity levels. A positive pressure can be maintained within the nonmetal pipes during applications. Piping systems can be returned to service within approximately 96 hours.

The present invention provides an aqueous polymer emulsion with satisfactory resistance to electrochemical deposition property and good porosity sealing performance on casting metals or parts co-molded by two different metal materials. The aqueous polymer emulsion comprises at least one (meth)acrylic polymer prepared by at least two monomers comprising at least one alkyl (meth)acrylate and at least one unsaturated carboxylic acid, at least one corrosion inhibitor, and at least one chelating agent, wherein the at least one unsaturated carboxylic acid is present in an amount of less than 3.5% by weight, based on the total weight of the monomers.

A sodium silicate solution and fiber composition for repairing leaks in plumbing, and methods of making and using the same.

A sodium silicate solution and fiber composition for repairing leaks in plumbing, and methods of making and using the same.

In an example, a method of repairing a pipeline includes isolating a section of a pipeline that includes a leak site. The method includes flooding the section of the pipeline with a plug formulation that includes artificial platelets and an ultraviolet (UV) photoinitiator. The section may be pressurized to induce migration of the artificial platelets to the leak site. The method also includes draining excess plug formulation from the section of the pipeline. The method further includes exposing the UV photoinitiator to UV light to form a gas impermeable seal at the leak site.

In an example, a method of repairing a pipeline includes isolating a section of a pipeline that includes a leak site. The method includes flooding the section of the pipeline with a plug formulation that includes artificial platelets and an ultraviolet (UV) photoinitiator. The section may be pressurized to induce migration of the artificial platelets to the leak site. The method also includes draining excess plug formulation from the section of the pipeline. The method further includes exposing the UV photoinitiator to UV light to form a gas impermeable seal at the leak site.

Using general purpose raw materials, a polyurethane foam having higher water stopping properties than conventional ones is provided. The polyurethane foam is a polyurethane foam obtained by foaming and curing a composition containing a polyol component, an isocyanate component, a foam stabilizer, a cross-linking agent, and a catalyst.

Using general purpose raw materials, a polyurethane foam having higher water stopping properties than conventional ones is provided. The polyurethane foam is a polyurethane foam obtained by foaming and curing a composition containing a polyol component, an isocyanate component, a foam stabilizer, a cross-linking agent, and a catalyst.

Provided is a waterproofing method using an acrylic injection material, more particularly, the method including confirming a crack site; perforating a plurality of injection holes from an upper part of the crack site; installing packers in the perforated injection holes; filling the crack site by injecting a two-liquid type acrylic injection material into the packers installed in the injection holes; and removing the installed packers. According to the waterproofing method using an acrylic injection material according to the present invention, crack sites can be efficiently repaired on the roof, underground parking lot, or upper part of a toilet, and so the waterproofing method has excellent waterproofing efficiency, and excellent construction convenience and durability.

Provided is a waterproofing method using an acrylic injection material, more particularly, the method including confirming a crack site; perforating a plurality of injection holes from an upper part of the crack site; installing packers in the perforated injection holes; filling the crack site by injecting a two-liquid type acrylic injection material into the packers installed in the injection holes; and removing the installed packers. According to the waterproofing method using an acrylic injection material according to the present invention, crack sites can be efficiently repaired on the roof, underground parking lot, or upper part of a toilet, and so the waterproofing method has excellent waterproofing efficiency, and excellent construction convenience and durability.