PourMath

Promise Epoxy

Fast Cure Deep Pour Epoxy

Type
Deep pour
Data sheet revision
Revsion Date 08/06/2025
Sources checked
2026-09-30
Page status
Published October 3, 2026

A 1:1 faster-curing deep-pour epoxy. Its data sheet allows layers of 1.5 in or less for pours of 2 gallons or more and 24 hours between layers, but the product page says it is not suited to deep pours over 1/2 in such as river tables.

Published values

Copied as printed, with test conditions where the manufacturer gives them. Tags link to the source document.

Mixing
Mix ratio by volume (A:B)1 Part Resin : 1 Part Hardener (by volume)TDS
Mix ratio by weight (A:B)not published
Pouring
Maximum pour depth per layerlayers of 1.5 in or less for pours of 2 gallons or more; up to 3 in thick in small quantitiesTDS1.5 in per layer applies to larger pours of 2 gallons (7.57 L) or more; up to 3 in (7.6 cm) is allowed only in small quantities. The product page says the product is not suitable for large or deep pours over 1/2 inch such as river tables (see conflicts).
Minimum pour depthnot published
Maximum mass or volume per pournot published
Recommended temperature65ºF–75ºF (18ºC–24ºC)TDSrecommended room temperature for working and curing, humidity no more than 85% (repeated in the TDS and on the product page); the TDS table row 'Best Work Temp' says 75-80°F (see conflicts)
Working and cure times
Pot lifenot published
Working time1 hour once mixedTDSTDS table row is labelled 'Work Time (100 gram mass)'
Time between poursafter 24 hoursTDSif the prior layer has cured, lightly sand it (200-300 grit) and wipe with 90%+ isopropyl alcohol, denatured alcohol or acetone before the next layer
Recoat windownot published
Tack-freenot published
Demold24 hoursTDSno temperature or mass printed
Full cure3-5 daysTDSTDS table row 'Full Cure Time' (labels and values extract on separate lines; values follow the label order Work Time, Demold Time, Full Cure Time). TDS body text says 2-3 days (see conflicts)
Physical properties
Mixed viscositynot published
Specific gravity or density, Part A1.11SDS A
Specific gravity or density, Part B0.98 @ 25°CSDS B
Specific gravity, mixednot published
Density, mixednot published
Hardnessnot published

What the numbers mean for a pour

Automatic planning is suspended for this product: its documents give more than one depth limit (1/2 in, 1 1/2 in, 3 in) for different applications or sources, and we do not choose between them. Read the published wording and enter the limit that fits your project in the layer planner.

The data sheet gives the mix by volume only. From the published specific gravity of each part, the equivalent weight ratio is 100:88.3 (A:B). This is our calculation, not a manufacturer figure; the mix ratio converter shows the method.

Where these values come from

  • Mix ratio by volume: TDS (Promise Fast Cure Deep Pour Technical Data Sheet (24HR Fast Cure Deep Pour Epoxy)), accessed 2026-09-30
  • Specific gravity or density, Part A: SDS A (Promise Fast Cure Deep Pour Resin Safety Data Sheet (Fast Cure Deep Pour Resin)), accessed 2026-09-30
  • Specific gravity or density, Part B: SDS B (Promise Fast Cure Deep Pour Hardener Safety Data Sheet (Fast Cure Deep Pour Hardener)), accessed 2026-09-30

What the manufacturer says

Paraphrased from the manufacturer’s documents.

Other notes

  • Promise Epoxy is a brand of Polytek Development Corp. of Easton, PA.TDS
  • The product page says the epoxy is FDA compliant for food-contact surfaces when properly measured, mixed and fully cured.Page
  • Unmixed resin and hardener have a shelf life of 6 months.TDS

Intended use

  • The product page says this resin is not suited to large or deep pours over half an inch, such as river tables.Page

Surface preparation

  • Porous surfaces need at least one thin brushed seal coat (Promise suggests its Table Top Epoxy), and the deep pour can follow 3 hours after the last seal coat.TDS
  • Do not use the product over oil-based stains, paints or urethanes.TDS

Layering

  • Clean between layers with at least 90% alcohol and let it dry for an hour before adding resin.TDS

Temperature

  • Promise recommends a 65-75°F work environment and fans on the project to help carry heat away.TDS

Heat

  • Bubbles can be torched intermittently for about 60 minutes after the flood coat, but heating later risks scorching the resin.TDS

UV and color

  • The product page claims superior UV resistance against yellowing, while the TDS warns unused material may yellow or amber over time.Page

Safety data sheet summary

Signal word: DangerSDS B

Part A hazard statements

  • H315 Causes skin irritation
  • H317 May cause an allergic skin reaction
  • H319 Causes serious eye irritation
  • H411 Toxic to aquatic life with long lasting effects

Part B hazard statements

  • H302 Harmful if swallowed
  • H312 Harmful in contact with skin
  • H315 Causes skin irritation
  • H317 May cause an allergic skin reaction
  • H318 Causes serious eye damage
  • H361 Suspected of damaging fertility or the unborn child
  • H401 Toxic to aquatic life
  • H411 Toxic to aquatic life with long lasting effects

Protective equipment

  • Wear impervious gloves such as butyl or nitrile rubber.
  • Wear chemical safety glasses or goggles.
  • If ventilation is inadequate when using the hardener, wear a fitted NIOSH-approved air-purifying respirator with organic vapor cartridges; use supplied air for high exposures or emergencies.
  • An eye wash station and washing facility should be available in the work area.

Ventilation

  • Use both parts with adequate general or local exhaust ventilation to keep exposure low.
  • The hardener SDS gives the same ventilation instruction.

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

  • Maximum pour depth per layer: up to 3 in in small quantities; larger pours of 2 gallons or more in layers of 1.5 in or less (TDS) vs. Not suitable for large or deep pours over 1/2 inch, such as river tables (product page) (TDS, Page). The table shows the value from the TDS.
  • Full cure: Full Cure Time 3-5 days (TDS table) vs. Full Curing: Results in 2-3 days (TDS body text) vs. Cures in just 24 hours / Cure for 24 hours (product page) (TDS, TDS, Page). The table shows the value from the TDS.
  • Recommended temperature: room temperatures of between 65ºF–75ºF (TDS body text, twice) vs. Best Work Temp 75-80° F (TDS table) vs. room temperatures of 65°F-75°F (product page) (TDS, TDS, Page). The table shows the value from the TDS.

Not published

The documents listed below give no value for: Mix ratio by weight (A:B); Minimum pour depth; Maximum mass or volume per pour; Pot life; Recoat window; Tack-free; Mixed viscosity; Specific gravity, mixed; Density, mixed; Hardness. We leave these blank rather than estimate them.

Use this product in a calculator

Sources

  1. Promise Epoxy. Promise Fast Cure Deep Pour Technical Data Sheet (24HR Fast Cure Deep Pour Epoxy) (TDS). Document revision: Revsion Date 08/06/2025. Accessed September 30, 2026.
  2. Promise Epoxy. Promise Fast Cure Deep Pour Resin Safety Data Sheet (Fast Cure Deep Pour Resin) (SDS A). Document revision: Date Prepared/Revised: June 19, 2024. Accessed September 30, 2026.
  3. Promise Epoxy. Promise Fast Cure Deep Pour Hardener Safety Data Sheet (Fast Cure Deep Pour Hardener) (SDS B). Document revision: Date Prepared/Revised: June 19, 2024. Accessed September 30, 2026.
  4. Promise Epoxy. Promise Fast Cure Deep Pour Epoxy (Page). Accessed September 30, 2026.