upholstery foam closed cell

When your project lives near water, sun, or splashing kids, upholstery foam closed cell construction is the padding that keeps going. Unlike open cell foam, which soaks up moisture like a sponge, closed cell foam is made of sealed bubbles that resist water absorption. That makes it a smart pick for boat seats, patio cushions, and any seating that has to handle the elements.

Why Choose Closed Cell Foam for Upholstery

Closed cell foam is typically firmer and denser than standard cushion foam, giving seats a supportive, structured feel. Because it doesn't hold water, it helps limit mildew and odors and dries quickly after rain or spray.

Popular Uses

• Marine upholstery and boat seat padding
• Outdoor bench, patio, and pool lounge cushions
• Kneeling pads, gym mats, and RV seating

What to Look For

Consider thickness, firmness, and how the foam will be covered. Thinner sheets work well for padding over hard surfaces, while thicker pieces add comfort to seat cushions. Pair your foam with a water-resistant outdoor or marine fabric for the best results.

Find the Right Foam for Your Project

Ready to build cushions that stand up to the weather? Browse our closed cell foam options below and choose the thickness that fits your project.