Makrolon 2405: specs and equivalent grades
Covestro low-viscosity polycarbonate (PC) with easy release, in transparent, translucent and opaque colors. Published data, grades from other producers to ask about, and how to request a quote from one gaylord.
Request a QuoteThe short answer
Makrolon 2405 is Covestro's low-viscosity, general-purpose polycarbonate (PC) with easy mold release, sold for injection molding in transparent, translucent and opaque colors. Published melt volume rate is 19 cm³/10 min (MFR 20 g/10 min), measured at 300°C / 572°F, 1.2 kg, ISO 1133, and density is 1.20 g/cm³ (ISO 1183). Grades from other producers to ask about include Lexan 121R, Iupilon S-3000R and Wonderlite PC-122. They are not identical, so compare the data sheets and run a trial before switching.
Buying Makrolon 2405: one gaylord to a railcar · supplier COA on every prime lot · ships from 22+ partner warehouse locations · a polymer chemist checks the grade code before we quote · we aim to quote within one to three business days
Have a part number or drawing callout?
Paste it as written. A polymer chemist will tell you which grade it calls for, suggest equivalents and quote it by email.
Makrolon 2405 specs from the data sheet
Typical values from Covestro's published product data. Typical values are not specifications; the lot COA shows what you actually receive. Values only compare at the same test method and condition.
| Property | Value | Test method or note |
|---|---|---|
| Producer (brand owner) | Covestro | Product data page |
| Polymer | Polycarbonate (PC), low viscosity, easy release | |
| Process | Injection molding, general purpose | |
| Melt flow | MVR 19 cm³/10 min; MFR 20 g/10 min | 300°C / 572°F, 1.2 kg, ISO 1133 |
| Density | 1.20 g/cm³ (1,200 kg/m³, ISO 1183) | |
| Tensile modulus | 2,400 MPa (348,000 psi) | ISO 527 |
| Yield stress / strain at break | 65 MPa (9,430 psi) / 125 % | ISO 527 |
| Flexural modulus | 2,350 MPa (341,000 psi) | ISO 178 |
| Notched Izod impact, 23°C / -30°C, 3 mm | 65 kJ/m² (partial break) / 15 kJ/m² (complete break) | ISO 180/A |
| Notched Charpy impact, 23°C / -30°C, 3 mm | 65 kJ/m² (partial break) / 14 kJ/m² (complete break) | ISO 179/1eA |
| HDT 1.8 MPa / 0.45 MPa | 124°C / 255°F; 137°C / 279°F | ISO 75 |
| Vicat softening temperature, 50 N | 145°C / 293°F (50°C/h); 146°C / 295°F (120°C/h) | ISO 306 |
| Mold shrinkage, parallel / normal | 0.65 % / 0.70 % | ISO 294-4, 60×60×2 mm |
| Light transmittance, clear grade, 1 mm and 2 mm | 89 % | ISO/CIE 11664, D65 |
| Flammability | UL 94 V-2 at 0.36 mm and 0.75 mm; HB at 2.7 mm | UL 94 (as listed by Covestro) |
| Drying / melt temperature | 120°C / 248°F for 2–3 h, max 0.02 % moisture / 280–320°C (536–608°F) | Covestro processing data |
| Additives | Easy release (mold release) | |
| Food contact | Covestro states the product is not intended for regulated uses such as food contact, drinking water, medical devices or toys without its prior written approval. Ask Covestro for a letter for your exact use before you commit. |
Source data sheets are listed at the bottom of this page. Confirm against the current sheet for your exact grade code and color.
Grades to ask about instead of Makrolon 2405
These grades from other producers have similar published specs. None is a drop-in replacement: additive packages, flow at molding shear rates, color and approvals differ. If your part, drawing or customer approval names Makrolon 2405, any change needs your approval and usually a trial.
| Grade | Producer | Melt flow | Density | Key property | How it compares |
|---|---|---|---|---|---|
| Lexan 121R | NexPoint Materials in the Americas and Europe (formerly part of SABIC) | 18 g/10 min (300°C / 572°F, 1.2 kg, ASTM D1238) | Specific gravity 1.20 (ASTM D792) | Flexural modulus 2,340 MPa (ASTM D790); notched Izod 690 J/m (ASTM D256); HDT 129°C at 1.8 MPa (ASTM D648); UL 94 HB at 0.711 mm | Closest match. Same flow class with an internal mold release, for small, intricate parts. Data are ASTM, so values are close but not directly comparable with Covestro's ISO figures. Quote this alternative › |
| Iupilon S-3000R | Mitsubishi Engineering-Plastics | 16.5 g/10 min (300°C / 572°F, 1.2 kg) | Specific gravity 1.20 (ASTM D792) | Notched Izod 16.5 ft-lb/in (881 J/m) (ASTM D256); HDT 128°C at 1.8 MPa (ASTM D648); UL 94 V-2 at 1.59 mm | Partial match. Slightly lower flow than 2405. Values come from a U.S. distributor (PTS) copy, which does not say whether the grade contains a mold release; ask before assuming it releases like 2405. Quote this alternative › |
| Wonderlite PC-122 | Chi Mei | 22 g/10 min (300°C / 572°F, 1.2 kg, ASTM D1238) | 1.2 (ASTM D792) | Notched Izod 15.4 ft-lb/in (about 820 J/m) at 3.2 mm (ASTM D256); Vicat 150°C (ASTM D1525, 1 kg); UL 94 V-2 at 1.5 mm | Partial match. A high-flow general PC from Taiwan, so expect imported supply. The sheet does not state a mold release. Quote this alternative › |
From each producer's published data. Brand owners and grade names change; confirm on the current data sheet.
Typical uses for Makrolon 2405
From Covestro's product data and published listings:
- General-purpose injection-molded parts (Covestro's listed application)
- Transparent, translucent and opaque colored parts: 89 % light transmittance at 1 mm and 2 mm for clear material
- Thin-wall or detailed parts that benefit from low viscosity and easy release
- Parts with flammability requirements: Covestro's data sheet lists GWFI 850°C at 0.75 mm and UL 94 V-2 at 0.75 mm (confirm the UL listing for your color with UL or Covestro)
What to check before you switch
- Regulated uses: Covestro's product page says Makrolon 2405 needs Covestro's written approval for food contact, drinking water, medical or toy applications. Covestro sells separate grades for medical use, so do not assume 2405 covers a regulated part.
- Makrolon 2405 data are ISO; the Lexan, Iupilon and Chi Mei sheets cited here are ASTM. MFR is run at the same 300°C / 1.2 kg on both, but impact in kJ/m² (ISO) cannot be converted to J/m (ASTM).
- Same producer, different grade: Makrolon 2407 is the UV-stabilized version of 2405 (also MVR 19 cm³/10 min, HDT 124°C at 1.8 MPa). If your drawing says 2407, a plain 2405 or another non-UV grade is not a like-for-like swap.
- Release agent: 2405 is an easy-release grade. Substitutes without a stated release may stick or eject differently, and may paint or bond differently.
- Dry polycarbonate before molding: Covestro lists 120°C for 2–3 hours to 0.02 % maximum moisture. See our resin drying guide.
- Compare melt flow, density and impact only at the same test condition and method (ASTM vs. ISO results differ).
- Ask for the producer's food-contact or regulatory letter for the exact grade if the part needs one.
- Run a trial lot and check shrinkage, cycle time and appearance before you switch production.
Buying Makrolon 2405: price, lead time and lot size
- Lot size. From one gaylord to a railcar. See gaylord, LTL and truckload for typical weights per box.
- Where it ships from. 22+ partner warehouse locations. Material already in a partner warehouse usually moves sooner than a grade that has to come from the producer; your quote says which applies.
- Price. We do not publish prices because they move with feedstock, freight and order size. What moves your price most: lot size, color, ship-to region, and whether you need Makrolon 2405 itself or can accept a matched alternative. See how resin is priced and the monthly market update.
- Paperwork. Supplier COA on every prime lot (what a COA shows). Ask for the producer’s regulatory letter or UL file if your part needs them.
- Trying an alternative? Start with one gaylord as a trial lot, molded and checked before you commit a full release.
- If Makrolon 2405 itself is not available. Some branded grades are sold only through the producer’s own channels or go on allocation. If we cannot source it, we tell you, then quote a matched alternative with a side-by-side comparison.
Send the grade code, your annual volume and ship-to location. A polymer chemist checks it before we quote; we have been in the resin business for 30+ years. For several grades at once, use the resin RFQ template.
Trade names belong to their owners. ResinBridge is not affiliated with these producers; grade names are used only to identify the material. Data reflects published sheets as of October 2026.
Sources
- Covestro Makrolon 2405 product data
- Makrolon 2405 data sheet (distributor copy, PDF)
- Covestro Makrolon 2407 product data
- SABIC LEXAN 121R data sheet (distributor copy, PDF)
- Mitsubishi Iupilon S3000R data sheet (distributor copy, PDF)
- Chi Mei Wonderlite PC-122 data sheet (PDF)
Common questions
What is Makrolon 2405?
Makrolon 2405 is Covestro's low-viscosity, general-purpose polycarbonate with easy mold release, sold for injection molding in transparent, translucent and opaque colors.
What is the melt flow of Makrolon 2405?
MVR 19 cm³/10 min (MFR 20 g/10 min), measured at 300°C / 572°F, 1.2 kg, ISO 1133, per Covestro's published data.
What is equivalent to Makrolon 2405?
Grades from other producers to ask about include Lexan 121R, Iupilon S-3000R and Wonderlite PC-122. None is identical; compare data sheets and run a trial, and get approval if your part names Makrolon 2405.
Is Makrolon 2405 food-contact compliant?
Covestro states the product is not intended for regulated uses such as food contact, drinking water or medical devices without its prior written approval. Ask for a letter for your exact use before you commit.
Can ResinBridge quote Makrolon 2405?
We quote Makrolon 2405 when our supply partners can source it. If they cannot, we say so up front and quote a matched alternative, named on the quote with its data sheet, so you can decide whether to trial it. We quote Makrolon 2405 where we can source it, or a matched alternative, and say clearly which one you would get. Orders start at one gaylord; U.S. and Canada only.
If your grade is not listed, tell us what you run. We source commodity, engineering and specialty resins.
Need Makrolon 2405 or an equivalent?
A polymer chemist reviews every request, then matches your grade or finds a matched alternative and prices it.
What to send for an accurate quote
- The grade name, from any supplier, or a data sheet
- Color (natural, black or a custom match)
- Fill type and percentage, if any
- Melt flow, if you know it
- Quantity for this order and what you use in a year
- Ship-to city and state or province
Quote Makrolon 2405 or a matched alternative
A polymer chemist checks the data sheet and tells you exactly what you would get before you order.
Request a QuoteNot sure which grade fits your part?
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