Matt installed concrete blocks that my dad gave him. After installation, he sealed them with concrete sealer leaving a smooth surface. It looks like rustic tile. I plan to purchase some pretty fabric and make pillows to put in my swing. But I will have to buy a swing first. Matt installed concrete blocks that my dad gave him. After installation, he sealed them with concrete sealer leaving a smooth surface. It looks like rustic tile. I plan to purchase some pretty fabric and make pillows to put in my swing. But I will have to buy a swing first.