Hartex 103 Low ammonia natural latex Firestone Rubber - Natural rubber, NR ADHESIVE >> Water-based Firestone Hartex 103 natural latex is high quality centrifuged latex designed primarily for processes where low ammonia is preferred. Hartex 101 is processed in accordance with the very best commercial practices in large quantities at the Firestone Harbel, Liberia Plantation to insure maximum uniformity. The preservation system in Hartex 103 consists of a low ammonia concentration in combination with 0.036% tetramethylthiocarbamate and 0.036% zinc oxide, expressed on a wet weight basis. Hartex 103 is primarily used for coatings and adhesives. High quality centrifuged natural latex. Designed for processes where low ammonia is preferred. Used for adhesives. The preservation system consists of a low ammonia concentration in combination with 0.036% sodium dimethyldithiocarbamate and 0.036% zinc oxide, expressed on a wet weight basis.