Most hatches have anodized aluminum
frames, with Acrylic
(Plexiglass™) or Polycarbonate (Lexan™) glazing (not glass), for which a mediun or hi-modulus neutral curing
silicone sealant, such as Dow Corning 795, (NOT acetoxy* cure) is usually recommended.
You should probably seek specific recommendations (performance & compatibility) from your glazing supplier.
* If acetal cure (oxime) type silicone base sealant is used, the emitted gas causes corrosion
& cracking (in plastics).
If your replacement glazing is actually glass, I'd recomment either a polysufide or apolyurethane adhesive