FlexFoam-iT!™ series foams are high-quality, water-blown flexible foams that can be used for a variety of industrial, special effects and arts & crafts projects. Among the many possible uses are the manufacture of theatrical props (swords, knives, hammers, etc.), industrial seals, custom padding and cushioning, etc. SO-Strong™, UVO™ or IGNITE™ dyes can be added for color effects. Liquids from parts A and B are combined, mixed and poured into a mold or other form (apply release agent if necessary). The mixture rises and hardens rapidly to give a solid, flexible foam. Foams vary in density and offer good physical properties. FlexFoam-iT™ III is the lowest density foam and the one that expands the most (15x expansion compared to original volume).
Store and use at room temperature (73°F/23°C). Use in low-humidity environments (less than 50% relative humidity). Mixing containers should have straight sides and flat bottoms. Mixing sticks should be flat and rigid with defined edges so that you can scrape the sides and bottom of your mixing container. Good ventilation (room size) is essential.
This product has a limited shelf life and should be used as soon as possible.
Wear safety goggles, long sleeves and rubber gloves to minimize the risk of contamination.
As no two applications are the same, a small test is recommended to determine the suitability of the product for your project if the material’s performance is in question. Application of a release agent
Urethane foams are adhesive and stick to many surfaces. We recommend the use of Ease Release 2831 to release urethane foam from most surfaces.
If application of the release agent is particularly difficult (e.g. urethane foam release from urethane rubber), we recommend an application of Universal Mold Release followed by an application of Ease Release 2831.
WARNING: Do not use Universal Mold Release alone, or any other silicone-based release agent. The foam would collapse.
IMPORTANT: To ensure complete coverage, lightly brush the release agent onto all surfaces with a soft brush. Allow the release agent to dry for 30 minutes. The product’s shelf life is reduced after opening. Any remaining product should be used as soon as possible. Immediately replacing the lids on both containers after dispensing will help prolong the shelf life of unused product.
XTEND-IT™ Dry Gas Blanket (available from Smooth-On) will significantly extend the shelf life of unused liquid urethane products.
Pre-mix parts A and B – Stir or shake parts A and B well before dispensing.
Measure – Stop! Know the mixing ratio of the foam product you’re using. Some are by weight, others by volume. Dispense the correct quantities of Part A and Part B into a large mixing container.
For best results – Pre-mix Part B after measuring – although not necessary, pre-mixing Part B using a drill and mechanical mixer (such as a turbine mixer available from Smooth On) after measuring and before combining with Part A will give the best results. For best results – Use a mechanical mixer – Mix for 30 seconds and pour into mold or form. Mixing by hand – Mix quickly and deliberately for 30 seconds. Be sure to aggressively scrape the sides and bottom of your mixing container several times. Pour into mold or shape. Be careful not to splash low-viscosity liquids out of the container. Remember that these materials harden quickly. Do not delay between mixing and pouring.
Pouring and curing – For best results, pour your mixture into a single point at the lowest point of the containment field and let the mixture seek its level. Leave space in the containment field to allow the foam to expand to its final volume. Allow foam to harden for at least 30 minutes before handling.
Mass concentration / Mold configuration – Pouring large quantities at a time into certain mold configurations (i.e. cylinders) could lead to excess heat and cracking. Casting in layers can solve this problem.
Improved surface finish and reduced voids thanks to back pressure – Plugging the mold cavity opening with a plate fitted with pre-drilled holes will improve the surface finish of certain foams.
Is your foam collapsing? – This is a common phenomenon associated with cold temperatures, inadequate mixing or both.
Environment or material too cold? Warm it up.
The wrong mix? The two parts, A and B, must be thoroughly pre-mixed. After combining A and B, mix well. If using a mechanical blender, blend for 30 seconds. If using a hand blender, mix quickly and aggressively, almost whisking the material.