Frequently Asked Questions

UVPoxy is a coating resin, while FlowCast is formulated to be used for large castings. Like FlowCast, UVPoxy cures to a high gloss water clear finish. However, UVPoxy is a much more reactive formulation than FlowCast. The reactivity is optimized to allow it to cure quickly when applied as a thin coating. UVPoxy is not meant for small castings and does not have optimized air release.

All epoxies yellow over time. To combat this, we formulated FlowCast SPR with UV stabilizers. These additives absorb UV light and prevent damage to the resin. Eventually, the stabilizers will lose their effectiveness. Adding metallic or liquid pigments to FlowCast SPR will help it resist yellowing better than if it is left transparent. Completed projects should not be kept outdoors.

We recommend seal coating any surfaces that will be submerged in FlowCast SPR. Seal coats help prevent air and moisture migrating out of submerged materials, which can cause bubbles. UVPoxy is the preferred system for seal coats as it is a faster curing resin made for applying in thin layers. FlowCast SPR can also be used but will not get to the tacky state as quickly. Cured seal coats should be abraded and cleaned before proceeding with pours.

If you are planning to pour deeper than 25 mm (1”) and at a volume greater than 3 L, pouring in multiple layers is suggested to prevent overheating. In large quantities, FlowCast SPR can generate significant heat, which can cause projects to yellow or form cracks. If multiple pours of FlowCast SPR is not an option, for projects that require pours greater than 25 mm (1”) in depth, it is recommended to use FlowCast.

Yes, FlowCast SPR is suitable for multi-layer pours. Additional layers should be poured when the previous layer has reached set to touch. To prepare the epoxy surface for the next pour, scuff the surface with 220 grit sandpaper. Remove excess dust and debris, then wipe clean with denatured or isopropyl alcohol. You can then pour the next layer.

FlowCast SPR provides the same beautiful results as FlowCast with two key differences:

• At the start of mixing, FlowCast SPR will feel slightly thicker and will be more difficult to mix. However, once mixed, FlowCast SPR will feel like FlowCast.
• FlowCast SPR reacts faster than FlowCast and can reach higher temperatures while curing given the same casting size. This means you can create smaller volume or thinner profile projects that cure faster. However, this also means that FlowCast SPR is not suitable for larger pours.

All epoxies yellow over time. To combat this, we formulated FlowCast with UV stabilizers. These additives absorb UV light and prevent damage to the resin. Eventually, the stabilizers will lose their effectiveness. Adding metallic or liquid pigments to FlowCast will help it resist yellowing better than if it is left transparent. Completed projects should not be kept outdoors.

For a high gloss top coat, EcoPoxy’s UVPoxy is an ideal choice. For matte to gloss finishes, use wood wax, hard wax oil, or urethanes. Any product that is intended for wood finishing is compatible with FlowCast.

We recommend seal coating any surfaces that will be submerged in FlowCast. Seal coats help prevent air and moisture from migrating out of submerged materials, which can cause bubbles. UVPoxy is the preferred system for seal coats as it is a faster curing resin made for applying in thin layers. Cured seal coats should be abraded and cleaned before proceeding with pours.

If you are planning to pour thicker than 38 mm (1.5”) and at a volume greater than 30 L, pouring in multiple layers is suggested to prevent overheating. Alternatively, you can actively cool a thicker pour with fans, but you must be prepared to constantly monitor the temperature to make sure that your project does not overheat. Note that results will vary depending on ambient temperature. When mixed in large quantities, this product can generate significant heat. Handle with care.

Yes, FlowCast is suitable for multi-layer pours. Additional layers can be poured without surface preparation when the previous layer is tacky to touch. If the previous layer is no longer tacky to touch, you will need to wait for the resin to reach sufficient hardness (approximately 72 hours), then scuff the surface with 220 grit sandpaper. Remove excess dust and debris with compressed air and wipe the surface clean with denatured or isopropyl alcohol before pouring the next layer.

Used in low volumes, FlowCast cures extremely slowly. Product cure times vary depending on the volume used. For smaller castings, such as serving trays or coasters, we recommend that you use FlowCast SPR.