Importing the package

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;

ZenGetters/ZenMethods without parameters

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

ZenMethods with parameters

Check if two IMaterials match

Uses an IMaterial.
Returns a bool.

materialObj.matches(IMaterial other);

Getting Vanilla Minecraft Materials

You can use these methods to get the vanilla minecraft materials

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();