Are Foam-iT! and FlexFoam-iT! "water-blown" foams or "solvent-blown" foams?

Article courtesy of Smooth-On, Inc.

Foam-iT! and FlexFoam-iT! castable foams are water-blown polyurethane foams that expand and cure quickly to solid, strong, lightweight foams. These types of foams are also known as "cold foam" because they do not require baking in an oven to cure. They are designed to be processed and cure at room temperature (73°F / 23°C).


This FAQ article is offered as a guideline and offers possible solutions to problems encountered during mold making and casting. No warranty is implied and it is up to the end user to determine suitability for any specific application. Always refer to the provided Technical Bulletins (TB) & Safety Data Sheets (SDS) before using any material. A small scale test is suggested to determine suitability of any recommendation before trying on a larger scale for any application.