If you mean the sort of basins you use to wash in and brush your teeth in, you either need to call a plumber for advice; that advice might be to replace the basin immediately.
No.
To effectively seal a cracked bathtub, you can use a waterproof silicone caulk. Clean the cracked area thoroughly, apply the caulk, and smooth it out with a caulk tool or your finger. Allow it to dry completely before using the bathtub.
Replacing the seal is the only good, permanent way. The seal is old, cracked and leaking.
Failed gasket, seal, plug, cracked housing, etc.
To repair a cracked glass seal on your window, you can use a silicone-based sealant. Clean the area thoroughly, apply the sealant along the crack, and smooth it out. Let it dry completely before testing the window.
You replace it. It may be possible to have a professional welder weld the crack to seal it up again, but if its cracked then more than likely it got hit hard, and is too bent out of shape to be saved anyway.
If the seal on your cracked glass is broken, you should consider repairing or replacing the glass to prevent further damage and maintain the integrity of the structure. It is important to address the issue promptly to avoid any safety hazards or potential complications.
Bad Head Gasket or Cracked Block (rare)
You can use gulf wax to seal bottles. If the surface of the bottle is cracked, male sure the surface is dry, and place the wax over the crack, and allow it to try, and that should seal the crack.
To effectively seal cracked wood and prevent further damage, you can use wood filler or epoxy resin to fill in the cracks. Sand the area smooth once the filler has dried, then apply a sealant or varnish to protect the wood from moisture and further cracking.
probably your weather seal to your driver side door or your weather seal to your Wind shield do you have just a little rust around it or bubble like rust? is the seal dried up, cracked?
The torque converter may be cracked.