I would try and get the GE 1200. Its WAY stronger than the home hardware brand.
The Home hardware silicone will definately work (I have used it before many times) but if you are going through all the work of cleaning the silicone out of the old tank then you might as well seal it up with the best silicone possible IMO.

While the GE 1200 is stronger than regular silicone, it costs a bit more. When re-sealing, you aren't adding any strength, just a water seal, so you might as well just use regular silicone. GE I is still fine, and Home Hardware carries a brand that is safe for aquariums. It's labelled as 100% silicone, kind of a generic tube.