Eastman Propcorn—effective preservation solution for on-farm grains

Eastman Propcorn preservatives are designed to cover a full range of grain preservation needs on farm.

Eastman Propcorn products are particularly suitable to control molds as well other harmful microbes that may proliferate in grains together with molds. Eastman Propcorn is an effective way to preserve grains in aerobic conditions. It is also well suited for ensiling high-moisture grains and corn or for stabilizing silages and by-products during feed-out. Its efficacy is based on propionic acid and its salt form, which are both normal compounds in animal digestive tracts. Detailed application instructions ensure success despite variable grain moisture. Buffered products have reduced corrosivity compared to propionic acid.

What does Eastman Propcorn offer?

Proven efficacy

Propcorn preservation products have a high content of active ingredients, which brings efficiency to preservation. Successful preservation produces high-quality grains, which results in reduced losses and better health and welfare of both people and animals. Recommendations for Eastman products are based on scientific trials as well as practical experiences at the farm level. In grain preservation, application instructions are very detailed due to the variety of different combinations of grain species, grain moisture, grain crushing, and preservation time. Correct and reliable application instructions are crucial to successful preservation.


Propcorn is a user-friendly alternative to propionic acid for grain preservation. Propionic acid is effective at preventing fungal growth and has been used in feed and food preservation for decades. However, pure propionic acid is corrosive to both skin and metal, requiring special materials for equipment. Furthermore, its volatility causes a pungent odor. Through experience and years of extensive research, Eastman can demonstrate that buffering propionic acid with ammonium propionate reduces its volatility and corrosivity. Buffering reduces the product smell and makes it less corrosive to both skin and metal compared to pure propionic acid. Therefore, Propcorn products are easier to use and provide the effectiveness of propionic acid against molds with improved user experience.

Certain statements may not be applicable in all geographical regions. Product labeling and associated claims may differ based on government requirements.