Once your gravel is well-coated ... Guar gum is the lowest adhesive binder, followed by xanthan gum, which has a slightly stronger adhesion. Psyllium husks are coated with mucilage, a natural ...

and PetraMax Rock Glue, available for $35.99 per gallon. You can also use Gravel-Lok, which is a polyurethane (one of the more common forms of resin) binder that is specifically designed for gravel.