EcoPoxy
FlowCast
- Type
- Deep pour
- Data sheet revision
- NA_EN_FlowCast_TDS_092223_v2.3
- Sources checked
- 2026-09-30
- Page status
- Published October 3, 2026
A 2:1 casting epoxy for large pours such as river tables. EcoPoxy's data sheet gives a maximum of 38 mm (1.5 in) per pour, 8 to 12 hours of working time, and a 20 to 44 hour tacky window for the next layer.
Published values
Copied as printed, with test conditions where the manufacturer gives them. Tags link to the source document.
| Mix ratio by volume (A:B) | 2:1TDS |
|---|---|
| Mix ratio by weight (A:B) | 2.3:1TDS |
| Maximum pour depth per layer | 38mm (1.5")TDSper layer; recommended casting thickness 13-38mm (0.5-1.5") for pours up to 30 L without additional cooling |
|---|---|
| Minimum pour depth | 13mm (0.5")TDSlower end of recommended casting thickness; FlowCast cures more slowly at lower thicknesses and volumes |
| Maximum mass or volume per pour | 30LTDSper layer, without additional cooling / heat management |
| Recommended temperature | 20-25°C (68-77°F)TDSrecommended working temperature; ideal 22°C (72°F) |
| Pot life | not published |
|---|---|
| Working time | 8-12 hoursTDS203mm x 1828mm (8" x 72") casting poured 38mm (1.5") deep (~14 L), ambient 21°C (70°F), 50% RH; time in mold |
| Time between pours | 20-44 hours (tacky to touch period)TDSpour next layer while previous layer is tacky to touch (no abrading needed); same 14 L / 38mm test casting at 21°C (70°F) |
| Recoat window | 20-44 hours (tacky to touch period)Instr.additional layer without abrading while previous layer is tacky to touch; after that, wait approx. 72 h, scuff with 220 grit and clean |
| Tack-free | 44 hours (set to touch)TDSset to touch = surface tack-free; 14 L / 38mm test casting at 21°C (70°F) |
| Demold | 3 daysTDS14 L / 38mm test casting at 21°C (70°F); casting should be supported until fully cured |
| Full cure | 7-14 daysTDS14 L / 38mm test casting at 21°C (70°F) |
| Mixed viscosity | 280 cPTDSinitial mixed viscosity at 22°C (72°F), ASTM D2196 |
|---|---|
| Specific gravity or density, Part A | 1.122TDS |
| Specific gravity or density, Part B | 0.978TDS |
| Specific gravity, mixed | not published |
| Density, mixed | not published |
| Hardness | Shore D 80TDS |
What the numbers mean for a pour
Pours needed with a limit of 1.5 in per pour. Worked out with the layer planner.
| Total thickness | Pours | Earliest start of last pour | Notes |
|---|---|---|---|
| 1 in (25 mm) | 1 | no wait (one pour) | – |
| 2 in (51 mm) | 2 | not calculated (see below) | – |
| 3 in (76 mm) | 2 | 20 h after the first, if the conditions below are met | – |
| 4 in (102 mm) | 3 | not calculated (see below) | – |
The published wait applies to a 1.5 in layer; your layers are 1 in. No schedule is calculated for a thickness the data sheet does not cover.
Only if these published conditions are met: pour next layer while previous layer is tacky to touch (no abrading needed); same 14 L / 38mm test casting at 21°C (70°F)
The published wait applies to a 1.5 in layer; your layers are 1.33 in. No schedule is calculated for a thickness the data sheet does not cover.
What the manufacturer says
Paraphrased from the manufacturer’s documents.
Intended use
- EcoPoxy positions FlowCast as a two-part casting epoxy for large castings such as live-edge river and ocean tables.TDS
Layering
- If the previous layer is no longer tacky, wait roughly 72 hours, scuff with 220-grit sandpaper and clean with alcohol before the next pour.Page
Temperature
- Pours thicker than 1.5 in and larger than 30 L need temperature monitoring and fans, switched on once the resin reaches 35°C.Instr.
Heat
- The TDS reports a peak exotherm of 82°C (180°F) for a 1.5 kg casting and rates reactivity as low.TDS
- Cured FlowCast has a DSC glass transition temperature of 42°C (108°F), above which it may deform under load.TDS
Other notes
- The TDS lists a theoretical density of 1.07 g/cm3 (0.039 lb/in3) under cured resin properties, not as a mixed-liquid density.TDS
- FlowCast cures very slowly in small volumes, and EcoPoxy recommends FlowCast SPR for small castings like trays or coasters.Page
- Shelf life is two years unopened, with recommended storage at 15-25°C (59-77°F).TDS
UV and color
- FlowCast contains UV stabilizers that eventually wear out, and finished projects should not be kept outdoors.Page
Surface preparation
- Live edges should be seal-coated with UVPoxy first to stop air escaping from the wood and forming bubbles.Instr.
Safety data sheet summary
Signal word: DangerSDS B
Part A hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H317 May cause an allergic skin reaction
- H341 Suspected of causing genetic defects
Part B hazard statements
- H318 Causes serious eye damage
- H302 Harmful if swallowed
- H312 Harmful in contact with skin
- H314 Causes severe skin burns and eye damage
Protective equipment
- Wear chemical-resistant, impervious gloves and inspect them before use.
- Wear safety glasses or goggles for Part A.
- For Part B, use safety glasses with side shields or goggles, consider a face shield against splashes, and wear full body protection.
- Wear an approved respirator if engineering controls do not keep airborne concentrations below exposure limits.
Ventilation
- Provide enough ventilation to keep vapor, mist and dust levels below workplace exposure limits, and have eyewash stations and safety showers nearby.
- Part B should only be used with adequate ventilation.
A summary, not the full SDS. Read the SDS for both parts before use and follow its first-aid section in case of exposure. This is not medical advice.
Where the manufacturer’s documents disagree
- Specific gravity or density, Part A: 1.122 (TDS, specific gravity Part A at 22°C / 72°F, ASTM D1475) vs. Density 1.11 g/mL (SDS Part A section 9, rev. 12.15.2021) (TDS, SDS A). The table shows the value from the TDS.
- Specific gravity or density, Part B: 0.978 (TDS, specific gravity Part B at 22°C / 72°F, ASTM D1475) vs. Density 0.9658 g/cm3 (20 °C) (SDS Part B section 9, rev. 05.10.2023) (TDS, SDS B). The table shows the value from the TDS.
Not published
The documents listed below give no value for: Pot life; Specific gravity, mixed; Density, mixed. We leave these blank rather than estimate them.
Use this product in a calculator
Sources
- EcoPoxy. FlowCast Technical Data Sheet (EN) (TDS). Document revision: NA_EN_FlowCast_TDS_092223_v2.3. Accessed September 30, 2026.
- EcoPoxy. FlowCast Application Guide (Instr.). Document revision: NA_EN_FlowCast_AG_102822-v2.3. Accessed September 30, 2026.
- EcoPoxy. Safety Data Sheet - FlowCast Part A (US English) (SDS A). Document revision: Revision date: 12.15.2021. Accessed September 30, 2026.
- EcoPoxy. Safety Data Sheet - FlowCast Part B (US English) (SDS B). Document revision: Revision date: 05.10.2023. Accessed September 30, 2026.
- EcoPoxy. Casting Epoxy Resin | Clear FlowCast for Thick Pours — EcoPoxy Inc. (Page). Accessed September 30, 2026.