Polysulfide sealants are very good if you're bedding metal hardware, but not so good if bedding anything with plastic in it. Polysulfide adhesives tend to attack most common plastics.
4200 is a polyurethane-based sealant, and very good for 99% of the work you might be doing. I bedded the solar-powered vents, the new mast step, the Spinlock PX PowerCleats and Lewmar line clutches on my boat with 4200.
As for wire-to-rope halyards... get rid of them. T-900 and other high tech dyneema/spectra/vectran based lines are far gentler on the other hardware, like the mast, the sheaves, your fingers, and lighter as well. They're often stronger than the steel wire they're replacing as well. For instance, 6mm wire rope has a breaking strength of about 2900 lbs. 6mm t-900 spectra/polyester double braid line has a breaking strength of about 4400 lbs. Basically a no-brainer IMHO.
I don't recommend using a shackle and bowline. The bowline is a horrible knot for use with a shackle. You're much better off using a buntline hitch or something similar. They're easy to tie, difficult as hell to untie once they've been in a while and very compact. Here is the buntline hitch:
Get yourself some 5/16" or 3/8" Sta-SetX for your main halyard, since it is fairly low stretch, but much more reasonably priced than T-900.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
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