MAS
Deep Pour X Casting Epoxy Resin
- Type
- Deep pour
- Data sheet revision
- Revised March 2023
- Sources checked
- 2026-09-30
- Page status
- Published October 3, 2026
A 2:1 deep-pour casting epoxy. MAS's data sheet allows up to 3 in in a single pour; its instructions give 24 to 48 hours between pours and ask for a 60 to 80 °F workspace.
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) | 2A : 1B by volumeTDS |
|---|---|
| Mix ratio by weight (A:B) | 100A : 44B by weightTDS |
| Maximum pour depth per layer | 3" thick in a single pourTDSTDS wording. The Instructions for Use separately give a general guideline of roughly 2–3 in per pour and say pouring over 3 in may cause yellowing, shrinking or cracking. |
|---|---|
| Minimum pour depth | minimum recommended casting depth of 2" depending on your working conditionsPagedepending on working conditions; pours under 2 in take 48-72 hours to cure (instructions) |
| Maximum mass or volume per pour | Do not mix more than 5 gallons at a time per mixing containerInstr.maximum mixing quantity per container; for larger projects mix multiple containers simultaneously |
| Recommended temperature | 60°F-80°FInstr.all materials and working conditions, maintained constant; cooler is better for thicker pours |
| Pot life | not published |
|---|---|
| Gel time (lab mass) | 22 h (150 g mass); 17 h (500 g mass)TDSat 25°C, ASTM D2471; 17 h for a 500 g mass. Gel time of a small lab mass, not the working time of a pour |
| Working time | up to 1 hour to mix and pour 5 gallons or less at 60-80°FInstr.upper bound, for 5 gallons or less at 60-80°F |
| Time between pours | Typical time between pours 24-48hrsInstr.each layer must harden and cool to room temperature (70-80°F) first; lightly scuff sand with 180 grit between coats |
| Recoat window | not published |
| Tack-free | roughly 12 hrsInstr.2-3 in thick casting at 77°F |
| Demold | not published |
| Full cure | 5-7 daysInstr.2-3 in thick casting at 77°F |
| Mixed viscosity | 300 cP (initial mixed, 25C)TDSinitial mixed viscosity at 25°C, ASTM D2196 |
|---|---|
| Specific gravity or density, Part A | Relative Density: 1.11SDS ASDS section 9, Part A resin |
| Specific gravity or density, Part B | Relative Density: 0.96SDS BSDS section 9, Part B hardener |
| Specific gravity, mixed | not published |
| Density, mixed | not published |
| Hardness | 83 Shore DTDS |
What the numbers mean for a pour
Pours needed with a limit of 3 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) | The total thickness is below the minimum pour thickness published for this product. |
| 2 in (51 mm) | 1 | no wait (one pour) | – |
| 3 in (76 mm) | 1 | no wait (one pour) | – |
| 4 in (102 mm) | 2 | 24 h after the first, if the conditions below are met | With full layers first, the last layer would be thinner than the published minimum. |
Only if these published conditions are met: each layer must harden and cool to room temperature (70-80°F) first; lightly scuff sand with 180 grit between coats
What the manufacturer says
Paraphrased from the manufacturer’s documents.
Other notes
- The TDS gives per-part liquid densities of 9.3 lbs/gal (resin) and 8.0 lbs/gal (hardener) at 25°C.TDS
- Gel time is 22 hours for a 150 g mass and 17 hours for a 500 g mass at 25°C.TDS
- Let the mixed epoxy stand 30-45 minutes at 60-80°F before pouring so mixing bubbles can escape.TDS
- Cured density is published as 1.11 g/cm³ (cured solid, not mixed liquid).TDS
Layering
- Each layer must harden and cool to room temperature (70-80°F) before the next, and should be lightly scuff-sanded with 180 grit.Instr.
- Pours thinner than 2 in take 48-72 hours to cure, and pours over 3 in risk yellowing, shrinking or cracking.Instr.
Temperature
- Thicker pours need cooler working conditions, and MAS recommends an air-conditioned workspace.Instr.
- The product page says not to use Deep Pour X at working temperatures above 85°F.Page
Surface preparation
- Seal bare wood with a faster MAS epoxy first; Deep Pour X is not recommended as a seal coat because it needs 2+ days before sanding.Instr.
Coverage
- One mixed gallon yields about 235 cubic inches (about 25 in³ per mixed pound).Instr.
Heat
- The TDS lists heat deflection temperatures of 121°F (room-temperature cure) and 115°F (post cure).TDS
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.
- H412 Harmful to aquatic life with long lasting effects.
Part B hazard statements
- H302 Harmful if swallowed.
- H312 Harmful in contact with skin.
- H314 Causes severe skin burns and eye damage.
- H317 May cause an allergic skin reaction.
- H318 Causes serious eye damage.
- 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 (resin and hardener SDS).
- Wear chemical safety glasses or goggles.
- If needed, use an approved respirator with organic vapour cartridges; supplied-air for higher exposures or emergencies.
Ventilation
- Use adequate general or local exhaust ventilation to keep exposure low (both parts).
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
- Mix ratio by weight (A:B): 100A : 44B (TDS handling-properties table) vs. 100A:43B (TDS mixing instructions and Instructions for Use) (TDS, Instr.). The table shows the value from the TDS.
- Working time: up to 1 hour to mix and pour 5 gallons or less at 60-80°F (Instructions for Use) vs. 12 hr working time (product page) (Instr., Page). The table shows the value from the Instr..
- Full cure: fully cured in 5-7 days, 2-3" casting at 77°F (Instructions for Use) vs. 36 hr cure time (product page) (Instr., Page). The table shows the value from the Instr..
Not published
The documents listed below give no value for: Pot life; Recoat window; Demold; Specific gravity, mixed; Density, mixed. We leave these blank rather than estimate them.
Use this product in a calculator
Sources
- MAS. DEEP POUR X Clear Casting Epoxy Resin System Technical Data Bulletin (TDS). Document revision: Revised March 2023. Accessed September 30, 2026.
- MAS. MAS Deep Pour X Instructions for Use (Instr.). Accessed September 30, 2026.
- MAS. Deep Pour X Casting Epoxy Resin - Up to 3" Deep Pours (Page). Accessed September 30, 2026.
- MAS. MAS Deep Pour X Resin Safety Data Sheet (SDS A). Document revision: May 26, 2022. Accessed September 30, 2026.
- MAS. MAS Deep Pour X Hardener Safety Data Sheet (SDS B). Document revision: September 13, 2023; Supersedes: June 1, 2023. Accessed September 30, 2026.