There are many Loctite products.Never used any of them. I understand each one is for a special work, but, If I am to by one (or two) for basic general work on the Seven which one you suggest please. If the treated bolt is to be removed and will be reused, what to do with the remnant of the old Loctite: - apply a new layer on top of the old one - remove the old loctite (?use methylated spirit) before applying a new layer - no need to top up. One application will last for ever Thank you Ahmed