Thiokol was concerned with rubber and it was a company.
Thiokol ( variously Thiokol Chemical Corporation , Morton-Thiokol Inc. , Cordant Technologies Inc. , Thiokol Propulsion , AIC Group , ATK Thiokol ; finally ATK Launch Systems Group before becoming part of Orbital ATK ) was an American corporation concerned initially with rubber and related chemicals , and later with rocket and missile propulsion systems . Its initial business was a range of synthetic rubber and polymer sealants , and Thiokol was a major supplier of liquid polymer sealants during World War II .