Scientech Technologies Pvt. Ltd. Manufactures Optical Index-Matching Gel, IF-400010. Scientech Technologies Pvt. Ltd. Is an ISO 9001:2000 certified company and is the manufacturer of test and measurement instruments. The Optical Index-Matching Gel is used to reduce Fresnel reflections and power loss in mechanical splices and connectors. It can be easily applied inside the mechanical splices and on the connector end faces.