A seamless undermount stainless steel sink system comprising: a solid countertop having a top surface and a bottom surface , said top surface and said bottom surface defining a thickness therebetween, a sink mounting aperture disposed through said solid countertop , said sink mounting aperture having an inner periphery , a stainless steel sink comprising a sidewall which forms at least one bowl , a rimless upper edge along and around said sidewall of said stainless steel sink , wherein an outer periphery is defined around said rimless upper edge , said rimless upper edge dimensioned to be inserted into said sink mounting aperture trough said bottom surface of said solid countertop , a mounting assembly comprising at least one mounting bracket attached to a portion of said stainless steel sink , said mounting bracket including a countertop flange having a countertop flange surface , said mounting bracket positioned a predetermined mounting depth below said rimless upper edge of said stainless steel sink , wherein said predetermined mounting depth has a tolerance of plus or minus one millimeter relative to said thickness of said solid countertop , an upper interface formed between said outer periphery of said stainless steel sink and said inner periphery of said sink mounting aperture , wherein said upper interface measures less than one millimeter between said outer periphery of said stainless steel sink and said inner periphery of said sink mounting aperture , and an upper seal disposed in said upper interface between said rimless upper edge of said stainless steel sink and said top surface of said solid countertop . a solid countertop having a top surface and a bottom surface , said top surface and said bottom surface defining a thickness therebetween, a sink mounting aperture disposed through said solid countertop , said sink mounting aperture having an inner periphery , a stainless steel sink comprising a sidewall which forms at least one bowl , a rimless upper edge along and around said sidewall of said stainless steel sink , wherein an outer periphery is defined around said rimless upper edge , said rimless upper edge dimensioned to be inserted into said sink mounting aperture trough said bottom surface of said solid countertop , a mounting assembly comprising at least one mounting bracket attached to a portion of said stainless steel sink , said mounting bracket including a countertop flange having a countertop flange surface , said mounting bracket positioned a predetermined mounting depth below said rimless upper edge of said stainless steel sink , wherein said predetermined mounting depth has a tolerance of plus or minus one millimeter relative to said thickness of said solid countertop , an upper interface formed between said outer periphery of said stainless steel sink and said inner periphery of said sink mounting aperture , wherein said upper interface measures less than one millimeter between said outer periphery of said stainless steel sink and said inner periphery of said sink mounting aperture , and an upper seal disposed in said upper interface between said rimless upper edge of said stainless steel sink and said top surface of said solid countertop . <EOS>