Commonly used imported natural rubber are Vietnam 3L and Thailand 3# cigarette gum.

Ma Biao has compound glue.

Composite rubber is a mixture of natural rubber, a small amount of synthetic rubber and some chemical products. The most commonly used compound rubber formula is this, for example, Malaysia's compound rubber SMR compound rubber 97%SMR 20 (Malaysia's standard rubber) +2.5%SBR (styrene butadiene rubber, a synthetic rubber) +0.5% stearic acid (stearic acid).

According to the fact that natural rubber is the most important component, composite rubber is called composite material. As mentioned above, SMR 20 is the most important component, so it is called Malaysia No.20 standard rubber composite material; There are also smoke compound and standard glue compound.