let me add another point here.
if you are installing the timing cover you will need a bead of this sealant on the entire cover, what happens when you paste it to the engine is that it squeezes out from the sides toyota say to apply sealant on tappet cover job.
There is a catch here, when you install the timing cover, it will take a few more assembly steps before you come to tappet cover, the oozed out sealant will dry. You have to cut this ooze with a razor blade, do not pull it out as it can tear the seal and you will have leaks, Once you cut it flush with the engine, apply a drop of sealant right before you are to set the cover - make sure to wipe the surface clean with acetone before you apply that drop.
Install cover while sealant is wet and tighten down.