An IMaterial object represents the material a block is made of.

It might be required for you to import the package if you encounter any issues, so better be safe than sorry and add the import.
import crafttweaker.block.IMaterial;

ZenGetter	ZenMethod	Rückgabetyp
ZenGetter blocksLight	ZenMethod blocksLight()	Rückgabetyp bool
ZenGetter blocksMovement	ZenMethod blocksMovement()	Rückgabetyp bool
ZenGetter canBurn	ZenMethod getCanBurn()	Rückgabetyp bool
ZenGetter mobilityFlag	ZenMethod getMobilityFlag()	Rückgabetyp string
ZenGetter liquid	ZenMethod isLiquid()	Rückgabetyp bool
ZenGetter opaque	ZenMethod isOpaque()	Rückgabetyp bool
ZenGetter replaceable	ZenMethod isReplaceable()	Rückgabetyp bool
ZenGetter solid	ZenMethod isSolid()	Rückgabetyp bool
ZenGetter toolNotRequired	ZenMethod isToolNotRequired()	Rückgabetyp bool
ZenGetter ​	ZenMethod setReplaceable()	Rückgabetyp IMaterial

Uses an IMaterial.
Returns a bool.

ZenScript
 Copy
materialObj.matches(IMaterial other);

You can use these methods to get the vanilla minecraft materials

ZenScript
 Copy
crafttweaker.blocks.IMaterial.air();
crafttweaker.blocks.IMaterial.anvil();
crafttweaker.blocks.IMaterial.barrier();
crafttweaker.blocks.IMaterial.cactus();
crafttweaker.blocks.IMaterial.cake();
crafttweaker.blocks.IMaterial.carpet();
crafttweaker.blocks.IMaterial.circuits();
crafttweaker.blocks.IMaterial.clay();
crafttweaker.blocks.IMaterial.cloth();
crafttweaker.blocks.IMaterial.coral();
crafttweaker.blocks.IMaterial.craftedSnow();
crafttweaker.blocks.IMaterial.dragonEgg();
crafttweaker.blocks.IMaterial.fire();
crafttweaker.blocks.IMaterial.glass();
crafttweaker.blocks.IMaterial.gourd();
crafttweaker.blocks.IMaterial.grass();
crafttweaker.blocks.IMaterial.ground();
crafttweaker.blocks.IMaterial.ice();
crafttweaker.blocks.IMaterial.iron();
crafttweaker.blocks.IMaterial.lava();
crafttweaker.blocks.IMaterial.leaves();
crafttweaker.blocks.IMaterial.packedIce();
crafttweaker.blocks.IMaterial.piston();
crafttweaker.blocks.IMaterial.plants();
crafttweaker.blocks.IMaterial.portal();
crafttweaker.blocks.IMaterial.redstoneLight();
crafttweaker.blocks.IMaterial.rock();
crafttweaker.blocks.IMaterial.sand();
crafttweaker.blocks.IMaterial.snow();
crafttweaker.blocks.IMaterial.sponge();
crafttweaker.blocks.IMaterial.structureVoid();
crafttweaker.blocks.IMaterial.tnt();
crafttweaker.blocks.IMaterial.vine();
crafttweaker.blocks.IMaterial.water();
crafttweaker.blocks.IMaterial.web();
crafttweaker.blocks.IMaterial.wood();