Any available spray to prevent fiberglass insulation particles fly in attic?

Nope. Just put a plywood floor over it, IF it's only between the joists. Or, if it's stacked up beyond the joists, then you can cover it with linen, craft-paper or butcher-paper. DO NOT use any kind of Plastic Sheeting or Foil, those will trap moisture from the house and cause mold problems all over.
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