Dextra India Pvt. Ltd. Manufactures Carbon Fibre-Reinforced Polymer. Dextra India Pvt. Ltd. Is an ISO 9001 certified company. The Carbon Fibre-Reinforced Polymer is used as externally bonded structural strengthening of concrete, masonry or wood members. It is used in conjunction with an appropriate levelling mortar or putty and structural adhesive system to improve the flexural or shear strength of the member.