The present invention relates to an automotive engine cooling system stop-leak formulation for repairing leaks in an engine cooling system, is compatible with common coolant antifreeze types and is capable of maintaining the repair after draining and re-filling the coolant. The automotive engine cooling system stop-leak formulation comprising a polymeric resin and a particulate package, wherein the particulate package comprises a first natural fibre having a first fibre length and a greater amount of a second natural fibre having a second fibre length.

The present invention relates to an automotive engine cooling system stop-leak formulation for repairing leaks in an engine cooling system, is compatible with common coolant antifreeze types and is capable of maintaining the repair after draining and re-filling the coolant. The automotive engine cooling system stop-leak formulation comprising a polymeric resin and a particulate package, wherein the particulate package comprises a first natural fibre having a first fibre length and a greater amount of a second natural fibre having a second fibre length.

The present invention relates to an efficient waterborne nano-silicon rubber sealing waterproof agent, comprising following components in parts by weight: 1090 parts of nano-silica gel, 10100 parts of nano-diatomaceous earth, 5150 parts of nano polyurethane, 15200 parts of nano inorganic dry powder, 10100 parts of nano methyl cellulose, 10150 parts of a chelating agent, 15200 parts of an expansion agent, 10250 parts of a strengthening agent, 5100 parts of an antifreezing agent, 2150 parts of a heat-resistant agent and 10100 parts of an acid and alkali-resistant agent. The efficient waterborne nano-silicon rubber sealing waterproof agent has good waterproofness, permeability, film forming property, elasticity, adhesion, water resistance and heat, humid and high temperature resistance, is suitable for being used for waterproof, anti-seepage and anti-leakage repair projects of underground engineering and roofing, and is an excellent vapor barrier material in a refrigerating chamber.

The present invention relates to an efficient waterborne nano-silicon rubber sealing waterproof agent, comprising following components in parts by weight: 1090 parts of nano-silica gel, 10100 parts of nano-diatomaceous earth, 5150 parts of nano polyurethane, 15200 parts of nano inorganic dry powder, 10100 parts of nano methyl cellulose, 10150 parts of a chelating agent, 15200 parts of an expansion agent, 10250 parts of a strengthening agent, 5100 parts of an antifreezing agent, 2150 parts of a heat-resistant agent and 10100 parts of an acid and alkali-resistant agent. The efficient waterborne nano-silicon rubber sealing waterproof agent has good waterproofness, permeability, film forming property, elasticity, adhesion, water resistance and heat, humid and high temperature resistance, is suitable for being used for waterproof, anti-seepage and anti-leakage repair projects of underground engineering and roofing, and is an excellent vapor barrier material in a refrigerating chamber.

The invention relates to the use of a composition comprising at least one polyamide, of which at least one is a semicrystalline copolyamide comprising at least one minor motif resulting from the polycondensation of: at least one diamine with at least one polymerised fatty acid, in particular a fatty acid dimer; or at least one diamine dimer with at least one carboxylic acid; or at least one amino acid dimer; or mixtures of same, as a sealing coating in a pipe containing oil or gas, said pipe being used in the operation of offshore oil or gas deposits.

The invention relates to the use of a composition comprising at least one polyamide, of which at least one is a semicrystalline copolyamide comprising at least one minor motif resulting from the polycondensation of: at least one diamine with at least one polymerised fatty acid, in particular a fatty acid dimer; or at least one diamine dimer with at least one carboxylic acid; or at least one amino acid dimer; or mixtures of same, as a sealing coating in a pipe containing oil or gas, said pipe being used in the operation of offshore oil or gas deposits.

The present invention relates to an efficient waterborne nano-silicon rubber sealing waterproof agent, comprising following components in parts by weight: 1090 parts of nano-silica gel, 10100 parts of nano-diatomaceous earth, 5150 parts of nano polyurethane, 15200 parts of nano inorganic dry powder, 10100 parts of nano methyl cellulose, 10150 parts of a chelating agent, 15200 parts of an expansion agent, 10250 parts of a strengthening agent, 5100 parts of an antifreezing agent, 2150 parts of a heat-resistant agent and 10100 parts of an acid and alkali-resistant agent. The efficient waterborne nano-silicon rubber sealing waterproof agent has good waterproofness, permeability, film forming property, elasticity, adhesion, water resistance and heat, humid and high temperature resistance, is suitable for being used for waterproof, anti-seepage and anti-leakage repair projects of underground engineering and roofing, and is an excellent vapor barrier material in a refrigerating chamber.

A self-healing hydraulic seal is provided. The self-healing hydraulic seal is prepared from a water-swellable elastomeric composition comprising a base polymer and a plant-based polysaccharide.

A self-healing hydraulic seal is provided. The self-healing hydraulic seal is prepared from a water-swellable elastomeric composition comprising a base polymer and a plant-based polysaccharide.

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.