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FlowCast® SPR

The Premium Casting Epoxy for Small Projects

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Original price
$39.56 USD
Starting at: $39.56 USD
Current price $39.56 USD
Size: 750 mL
Special Order

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Perfect for Small Pours

¼" to 1" Thick per Layer

Faster Curing

Finish Your Projects in a Weekend

Bubble-Free Castings

Excellent Air Release

Outstanding Transparency

Cures Water Clear

Small Projects Casting Epoxy

FlowCast SPR has been formulated with a simple 2:1 mix ratio and is designed for small castings, allowing users to create projects with thinner profiles, such as coasters and serving trays. It can be combined with Liquid or Metallic pigments to create custom colors and effects.

FlowCast SPR is intended for pours from 6-25 mm (¼-1") per layer, with a maximum volume of 3 L. FlowCast SPR can be worked using the same tools you have in your woodshop.

With our ever-growing line of EcoPoxy pigments and accessories, we can support you with everything you need for your epoxy projects.

Used to Create:

  • Serving Trays
  • Drink Coasters
  • Decorative Art Pieces
  • Other Small-Scale Live-Edge Casting Projects


Pour Depth6-25mm (0.25-1") for pours up to 3 L
Mix Ratio by Volume (A:B)2:1
Mix Ratio by Mass (A:B)2.5:1
Working Time (in mold) 4 - 5 Hours*
Set To Touch24 hours
Demolding Time24 Hours
Time Finishing1 day for 25mm (1”) pour*
Full Cure 3 Days*
Working TemperatureResin, workpiece, and workspace temperatures should be 20-25°C (68-77°F)
Storage Temperature15-25°C (59-77°F)
Clean UpIsopropyl/Denatured Alcohol or Warm Soapy Water
Shelf LifeTwo years in unopened container, 3 months once opened

*Times based on 25mm (1”) deep casting at a volume of 1.7L. Individual project times may vary depending on pour depth, volume, ambient temperature, and humidity.

Frequently Asked Questions

I am an experienced FlowCast user. What do I need to keep in mind when using FlowCast SPR?

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.
Can I do multi-layer pours with FlowCast SPR?

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.

Can I pour deeper than 25 mm (1”)?

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.

Do I need a seal coat for FlowCast SPR? What product do you recommend?

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.

Will my FlowCast SPR project yellow over time?

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.

Mixing & Application Instructions


Shake Part B well before use. In a clean, dry container combine (by volume) 2 parts resin with 1 part hardener and mix thoroughly for 4-5 minutes. Add Liquid or Metallic pigments as desired and mix until evenly dispersed.


Working area should be clean, dry, and free of dust. FlowCast SPR can be poured at 6-25 mm (¼-1”) per layer. FlowCast SPR will not shrink while curing under normal conditions. However, it may slowly fill cracks and voids in live edge wood pieces, causing the resin level to drop. Be prepared to add more epoxy as needed.

Epoxy releases heat when curing. For pours deeper than 25 mm (1") and/or at a volume greater than 3 L, multiple thinner pours may be necessary to prevent overheating. For best adhesion between layers, wait until the first layer is fully set to touch. Sand with 220 grit sandpaper and wipe down before pouring another layer.

Additional Tips & Tricks

Visit our Tutorials section for articles & videos on best ways to use our products.

EcoPoxy Tutorials

Need help?

1 (855) 326-7699

Premium FlowCast SPR Features

Perfect for Small Pours

With the ability to cast from ¼" to 1" thick per layer in pour volumes up to 3 L, FlowCast SPR is perfect for small-scale live edge wood projects.

Faster Curing

FlowCast SPR has been formulated to cure faster making it the ideal casting epoxy for weekend projects. When used under the recommended conditions, and in accordance with Application Guide instructions, you can expect your project to be ready for finishing in a day.

Bubble-Free Castings

FlowCast SPR’s low viscosity provides excellent air release allowing trapped air to rise to the surface, significantly reducing bubbles in the cured casting.

Outstanding Transparency

FlowCast SPR cures to a highly desired transparent water-clear appearance. It can also be combined with Liquid and Metallic pigments to create custom colors and effects.

What will you create with FlowCast SPR?

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