As the name suggests, liner of fertilizer cap is that used for internal sealing for fertilizer cap. Similar to an "underwear" is a close fit between fertilizer and fertilizer cap,isolating and sealing. Fertilizer cap liner, can fill the small gap between fertilizer cap and container mouth, improve sealing property to prevent leakage of fertilizer and moisture. Liner can buffer, protect the fertilizer particles from squeeze and broken in a transport. The liner acts as a barrier to air and moisture which can increase the lifespan of fertiliser. Depending on the design of variouscontainer mouths, theliner can be customized in material andshape to take greater advantage.