Length - 04:08 Spray-on concrete toppings are applied using a hopper gun. The cement-based topping will be sprayed down with the hopper gun. Once the material is sprayed on the concrete surface, a technique called a knock-down-finish is done. This is done with a standard concrete pool trowel to flatten the bumps left by the spray. Make sure the hopper (material canister) is in an upright position to prevent leakage. The settings on the tip of the gun can be adjusted based on the amount of material you want to be applied. Spray-on toppings are often applied on pool decks because they provide a slip-resistant finish.
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