Sonotube Concrete Forms

Rain resistance

Sonoco engineers applied a century of leadership in design, technology and manufacturing to create a high-strength, rain-resistant design for Sonotube forms. Sonoco's unique design has reduced the weight of the forms, making them easier to handle, set, strip and discard. What's more, with patented RainGuard technology, Sonotube round concrete forms stand strong even in wet weather - making it possible to set today and pour tomorrow.


Industry-leading technology and value

Contractors around the world have relied on the Sonotube® brand for more than half a century. More than just paper tubes, Sonotube concrete forms stand strong as the most economical way to create round columns for buildings, entryways, structural columns, light posts and other commercial and residential structures.

More recently, Sonoco leveraged over a century of paper-making experience to re-engineer its Sonotube concrete column forms. The outcome is a proprietary fiber form with improved strength, toughness and durability in wet conditions that has resulted in superior strength-to-weight properties and the virtual elimination of "blowouts" – the most frequent mode of failure of wet fiber concrete tubes.

Contractors widely recognize the advantages of Sonotube concrete forms. For instance, the superior strength-to-weight properties of Sonotube concrete forms prevent blowouts and may eliminate the need to use a crane during setup. And since Sonotube brand forms incorporate a proprietary, high-strength, water-resistant paper, contractors can set them in wet weather and pour concrete the next day. This gives contractors added scheduling flexibility to complete construction projects on time.