What are the best concrete outdoor ottoman additives for flexibility?

When crafting a durable and flexible concrete outdoor ottoman, selecting the right additives is crucial. Polymer modifiers, such as acrylic or latex, improve flexibility and crack resistance by enhancing the concrete's bonding properties. Fiber reinforcement, including polypropylene or glass fibers, adds tensile strength and reduces shrinkage cracks. For weather resistance, consider hydrophobic admixtures to repel moisture and prevent freeze-thaw damage. Additionally, superplasticizers can improve workability without compromising strength. These additives ensure your concrete ottoman remains sturdy yet flexible, perfect for outdoor use. Always follow manufacturer guidelines for optimal results.