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Deep Pour River Epoxy (2:1 Ratio) for Hemisphere / Dome Mold Calculator

Pre-loads specific gravity (1.11) and 2:1 mix ratio to calculate exact Part A & Part B weights with cup scraping buffer.

Calculated Benchmark Answer

A standard Hemisphere / Dome Mold (Ø10 cm minus 150 cm³ master) requires 134g (4.73 oz / 0.3 lbs) of Deep Pour River Epoxy (2:1 Ratio). Mix 89.4g Part A with 44.7g Part B (8% buffer included).

Casting Material & Volume Mode

SG: 1.11

Pre-loads specific gravity and 2:1 ratio by weight.

hemisphere

Geometry determines the container-volume formula. Use water displacement when the cavity is irregular.

cm(3.9 in)
Min: 2 cm17%Max: 50 cm
cm³(5.1 fl oz)
Min: 0 cm³3%Max: 5000 cm³

Volume displaced by your master object inside the box.

%
Min: 0 %40%Max: 20 %

Compensates for resin clinging to mixing paddles and cup walls (8% recommended).

Preset Values: Buffer Presets
Graduated Mix Volume Schematic
RATIO 2:1
25%50%75%100%PART A [BASE]89g3.15 oz+25%50%75%100%PART B [CATALYST]45g1.58 oz
PART A: 89.4gDeep Pour River Epoxy (2:1 Ratio)PART B: 44.7g
Total Batch RequiredKEY RESULT
134grams
4.73 oz (0.3 lbs)

Includes 8% waste buffer at SG 1.11

Part A (Base)
89.4g
3.15 oz

Ratio part: 2

Part B (Catalyst)
44.7g
1.58 oz

Ratio part: 1

Mold Cavity Volume
111.8cm³ / mL
3.78fl oz

Net volume before buffer

Verified Casting Kit Reference Spec

Order Deep Pour River Epoxy (2:1 Ratio) Kit

High-tear strength Deep Pour River Epoxy (2:1 Ratio) with verified 2:1 ratio. Ideal for bubble-free casting.

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Deep Pour River Epoxy (2:1 Ratio) vs Alternative Casting Compounds

Compare specific gravities, mix ratios, working times, and cure speeds across casting compounds.

Material / SpecificationSpecific GravityMix RatioPot LifeDemold Time
Deep Pour River Epoxy (2:1 Ratio)ACTIVE1.112:1 (weight)90 min48 hrs
RTV-2 Platinum Silicone (Smooth-On Mold Star 15/30)1.071:1 (weight)30 min6 hrs
RTV-2 Tin Cure Silicone (Condensation Cure)1.1210:1 (weight)45 min12 hrs
Jesmonite AC100 (Eco-Resin)1.752.5:1 (weight)12 min2 hrs
Jesmonite AC730 (Stone Casting)1.855:1 (weight)15 min4 hrs
Table Top & Art Epoxy (1:1 Ratio)1.081:1 (weight)25 min12 hrs

Step-by-Step Mix Ratio Derivation: Deep Pour River Epoxy (2:1 Ratio)

How displacement volume, specific gravity, and ratio split combine into final scale weights.

Step 1: Calculate Net Mold Cavity Volume111.8 cm³ (mL)
Formula: V_net = (2 / 3) × π × (D / 2)³ - V_master
Calculation: (2 / 3) × π × (10 / 2)³ - 150 cm³ = 111.8 cm³ (mL)

Calculates the empty fluid cavity by taking the gross 261.8 cm³ hemisphere containment volume and deducting the 150 cm³ displaced by the master model.

Step 2: Calculate Total Batch Weight with 8% Buffer134 grams
Formula: W_batch = V_net × SG × (1 + Buffer_pct / 100)
Calculation: 111.8 cm³ × 1.11 × 1.08 = 134 grams

Multiplies fluid volume by the specific gravity of Deep Pour River Epoxy (2:1 Ratio) (1.11 g/cm³) plus an 8% buffer for cup scraping and pouring loss.

Step 3: Divide into Part A and Part B by Mix RatioPart A: 89.4g | Part B: 44.7g
Formula: W_A = W_batch × (R_A / (R_A + R_B))
Calculation: 134g × (2 / 3) = Part A: 89.4g | Part B: 44.7g

Distributes batch mass according to the exact 2:1 ratio by weight.

MetriFab Precision GuaranteeFormulas cross-verified against Blum, Smooth-On, Polymaker, and eSun technical data sheets.
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Engineering Specifications & Troubleshooting Guide: Deep Pour River Epoxy (2:1 Ratio)

Factory-tested parameters, common failure modes, and workbench best practices.

Maker Pro Tips
  • Specially formulated with ultra-low viscosity and slow exothermic release for single pours up to 2 inches (50mm) deep.
  • Keep workshop temperature strictly between 20°C - 22°C (68°F - 72°F); hotter ambient will cause an exothermic runaway boil.
  • Pass a propane torch or heat gun lightly over the surface 15 minutes after pouring to pop rising bubbles.
Most Critical Mistake to Avoid

Pouring deeper than recommended in hot weather (>26°C), resulting in thermal yellowing, cracking, and smoke.

Recommended Machine Settings
mixing TechniqueStir slowly for 5-8 minutes by hand, scraping corners thoroughly. Never whip air into the mixture.
degassing RequiredNo
demold NoteWait 48 hours before demolding. Full cure for sanding and table-saw surfacing requires 7 full days.

Frequently Asked Questions: Deep Pour River Epoxy (2:1 Ratio)

Mix ratios, degas guidelines, cure times, and mold making tips.

Q1What is the mix ratio of Deep Pour River Epoxy (2:1 Ratio)?
Deep Pour River Epoxy (2:1 Ratio) has a mix ratio of 2 Part A to 1 Part B by weight. Always weigh both components on a digital scale for maximum cure integrity.
Q2How much Deep Pour River Epoxy (2:1 Ratio) do I need for a Hemisphere / Dome Mold?
For a standard Hemisphere / Dome Mold with Ø10 cm outer containment, you will need approximately 134 grams (89.4g Part A and 44.7g Part B) including an 8% waste buffer.
Q3How long before I can demold Deep Pour River Epoxy (2:1 Ratio)?
Deep Pour River Epoxy (2:1 Ratio) has a pot life (working time) of 90 minutes and can safely be demolded in 48 hours at room temperature (23°C / 73°F).

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