To produce zeolite bodies having high heat- and impact-resistance.

A mixture is formed by mixing up to about 40 pts.wt. of a thermal expansion control component which can be at least one of zircon, feldspar, calcium silicate, talc, steatite, forsterite, kyanite sillimanite, nepheline syenite, glasses, about 10-50 pts.wt. of permanent binder, at least 50 pts.wt. of molecular sieve, and temporary binder which can be cellulose ethers, cellulose ether derivatives, and combinations thereof, in a vehicle. The mixture is shaped into a green body and dried. The green body dried is fired to produce molecular sieves bodies.