I used Vuba Easihold to secure some landscape rocks in a 4 inch channel between cement boards in a driveway. - firm even after 1 coat (I did 2+). But one downside was that I needed MUCH more product than the product specs recommended. Based on the total area in square centimeters (converted to square metres) of a 5 liter drum it should have been enough. But once I started using it - even watering sparingly with a watering can as they recommend - it quickly became clear that even half a bottle wouldn't do for one coat. ordered 3 more bottles which was a bit overkill but it allowed me to apply 2 coats plus a light 3rd coat. I laid a layer of sand first, leaving about 2 inches of depth for the stones. Following your recommendations, I used stones no larger than 10mm, which I felt helped keep them firmly fixed. Maybe I miscalculated, or maybe the depth affected the amount required more than I thought. I'd say buy more than you need, but it's not cheap (although a lot cheaper than similar products I've found from local sellers) and I'm not sure what the return policy/cost is. That's the only thing keeping me from giving 5 stars. I still recommend it as we are very happy with the results.
Miukada 5lb River Rocks, Pebbles, Decorative Polished Gravel β Natural Mixed Color Stones
9 Review
π AquaticHI 27-Inch Aquarium Tongs - 100% Reef Safe - Multi-Purpose for Fresh & Saltwater Fish Tanks - Clip Plants, Spot Feed Fish & Coral - Keep Hands Dry
9 Review
Faucet for kitchen (sink) Blanco Fontas II (granite) pearl
16 Review
π³ Hygger Betta Log: Resin Hollow Tree Trunk Ornament for Betta Fish Tank Decor, Wood House Aquarium Accessories
9 Review
Steam cleaner Deerma Deerma DEM-ZQ610 EU, white/red
68 Review
Mini pump Xiaomi Mijia Electric Pump 1S, plastic, black
55 Review
π U-BCOO Aquarium Gravel Cleaner Fish Tank: Manual Siphon for Efficient Filter Gravel Cleaning and Water Change in Tanks
22 Review
Jasonwell Magnetic Aquarium Fish Tank Glass Algae Cleaner - Floating Brush (L Size)
37 Review