PMB 25/55 Polymer Modified Bitumen Specifications & Supply
A hard modified binder for heavily loaded pavements, quoted to your specification
PMB 25/55 is a polymer modified bitumen with a nominal penetration range of 25 to 55 (0.1 mm at 25°C). It is the second-hardest range in our polymer modified bitumen range , sitting between the very stiff 10/40 range and the mid-range 45/80.
TurkeyBitumen.com, operated by Tiger Bitumen and HY International Group, supplies this binder to contractors, asphalt producers and importers with Turkey-related requirements. Supply is arranged from Tiger Bitumen’s export facilities in Karachi Free Zone, Pakistan, and Ajman, UAE, and every offer is prepared against the specification you send us.
| Key Facts | ||
| Product | Polymer modified bitumen, nominal 25/55 range | |
| Nominal penetration range | 25-55 (0.1 mm) at 25°C | |
| Position in the PMB family | Second-hardest of the nine nominal ranges | |
| Overlapping ranges | 10/40, 40/100, and 45/80 | |
| Classification framework | EN 14023, TS EN 14023 or the project's own specification | |
| Complete designation | Confirmed against your specification at quotation stage | |
| Documentation | TDS and COA for the offered product; independent inspection on request | |
| Commercial terms | FOB, CFR or CIF | |
| Supplied from | Tiger Bitumen export facilities, Karachi Free Zone and Ajman | |
Reading the 25/55 Range
A penetration result between 25 and 55 means the standard test needle sinks between 2.5 and 5.5 mm into the binder at 25°C. That places the binder firmly in the hard part of the PMB family, though noticeably less stiff than 10/40.
The range is a consistency window and nothing more. It doesn’t describe softening point, elastic response, cold-temperature behaviour or storage stability. Those come from the class requirements written into your specification, and they are where two offers for the same range most often differ.
Overlapping Ranges: Why the Class Name Matters
The 25/55 range overlaps three neighbours. Its lower part (25–40) is shared with PMB 10/40, and its upper part is shared with PMB 40/100 (40–55) and PMB 45/80 (45–55). A binder with a penetration result between 45 and 55, for example, falls numerically inside all three of 25/55, 40/100 and 45/80.
That doesn’t make it compliant with all three. Each designation carries its own softening-point requirement and, depending on the specification, other property requirements. So when your specification names PMB 25/55, the offer should be tested and declared against that designation. An offer for a different range, accepted only because its penetration happens to fit, may not meet the rest of the class requirement.
Complete Designation and Softening Point
EN 14023 treats 25/55 as the penetration portion of a designation. The complete designation adds a softening-point requirement, which the specifier selects from the classes the standard provides. The specification may also set requirements for elastic recovery, storage stability, cold behaviour and properties after ageing.
The softening-point class that applies to PMB 25/55 depends on your project specification, so we don’t publish a single figure for the range. The complete designation is confirmed at quotation stage, against your specification and the TDS supplied with our offer. Tiger Bitumen explains how EN 14023 designations work in more detail.
For work in Turkey, the governing document is often TS EN 14023 or a project technical specification that draws on it. Other markets may use national or contract-specific documents. Either way, include it with your enquiry.
Properties to Confirm Before Ordering
| Property | Status for the 25/55 range | Commonly referenced test |
| Penetration at 25°C | Fixed by the range: 25-55 (0.1 mm) | EN 1426 |
| Softening point (ring and ball) | Per the class in your specification | EN 1427 |
| Elastic recovery | Per your specification, if required | EN 13398 |
| Storage stability | Per your specification, if required | EN 13399 |
| Fraass breaking point | Per your specification, if required | EN 12593 |
| Resistance to hardening (ageing) | Per your specification, if required | EN 12607-1 |
Only the penetration range is fixed by the name. Every other value depends on the complete designation and is shown in the TDS for the offered product and on the batch COA.
Where PMB 25/55 Is Typically Specified
Hard modified binders in this range are generally associated with pavements that carry heavy or slow-moving loads, such as:
- Binder and surface courses on heavily trafficked highways and motorways
- Bus lanes, junction approaches and roundabouts where traffic stops and starts
- Industrial, port and logistics pavements
- Airport pavements where the design calls for a stiff modified binder
- Mixes such as stone mastic asphalt where the mix design names a hard modified binder
Compared with 10/40, which is more often linked to very stiff base layers, the 25/55 range tends to appear where stiffness is still the priority but the layer sits closer to the surface. These are general patterns, not design rules.
Turkey’s climate varies considerably between regions. Hot summer regions and heavy freight routes may favour harder modified binders, while colder upland areas may need softer ones. The pavement engineer decides which range a project needs, and we supply against that decision.
How It Compares with Neighbouring Binders
| Binder | Difference from the 25/55 range |
| PMB 10/40 | Harder PMB range; overlaps between 25 and 40 |
| PMB 45/80 | Softer PMB range; overlaps between 45 and 55 |
| PMB 40/100 | Wide PMB range; overlaps between 40 and 55 |
| Bitumen 40/50 or50/70 | Unmodified penetration grades with similier-looking numbers. No polymer, and a different specification basis |
| Performance Grade bitumen | Separate classification by pavement temperature. No automatic PG equivalent exists for this range |
Handling and Packaging
Hard modified binders generally call for careful temperature control in storage, pumping and mixing. Storage temperature, storage time and any agitation should follow the TDS for the offered product. Packaging is agreed at quotation stage to match your receiving and handling arrangements.
Supplying the 25/55 Range for Turkey Related Projects
Turkey Bitumen gives buyers with Turkey related requirements an additional, documented offer to set alongside their existing supply. That includes contractors on projects in Turkey, importers who currently source from Turkish suppliers, and consultants preparing tenders that need more than one compliant source.
If you currently buy this binder from another source, send us the designation and specification you buy against. We will quote on the same technical basis, so the comparison covers specification match, documentation, inspection, shipping terms and delivered cost. Availability, quantity and shipment schedule are confirmed for each enquiry.
Documentation, Inspection and Export
- Terms: FOB, CFR or CIF.
- Inspection: SGS or Bureau Veritas before shipment on request, or an inspector you appoint.
- Documents: TDS for the offered product, plus commercial invoice, packing list, certificate of origin, COA and safety data sheet, depending on shipment and destination.
When reviewing a COA for this range, confirm it reports the softening point and every other property your specification lists, not just penetration. Tiger Bitumen’s PMB TDS and COA checklist is a useful reference.
Other PMB Ranges
See the full polymer modified bitumen range , or go to another range:
PMB 10/40 · PMB 45/80 · PMB 40/100 · PMB 65/105 · PMB 75/130 · PMB 90/150 · PMB 120/200 · PMB 200/300
Other Bitumen Products
PMB 25/55 FAQs
A polymer modified bitumen with a nominal penetration range of 25 to 55 (0.1 mm) at 25°C. It is the second-hardest of the nine PMB ranges we quote.
No. It is the penetration part only. The complete designation also includes a softening-point requirement set by your specification, which is confirmed at quotation stage.
It is generally associated with heavily loaded pavements, such as binder and surface courses on busy highways, bus lanes, junctions, and port or industrial areas. Suitability for your project depends on the pavement design and specification.
Not necessarily. Penetration is only one requirement. The binder must also meet the softening-point class and any other properties your specification sets for that designation.
Only if your specification allows it. PMB 45/80 is a separate class with its own requirements, and Bitumen 40/50 is an unmodified grade specified on a different basis.
No automatic one. EN 14023 and PG are separate classification systems. If your project is specified in PG terms, we quote against the PG grade.
Yes, as an international source supplying from Tiger Bitumen's export facilities in Karachi Free Zone and Ajman. TurkeyBitumen.com is not a Turkish manufacturer. Availability and schedule are confirmed for each enquiry.
Request a PMB 25/55 Quotation
To prepare an accurate offer, please send:
- The complete designation or specification clause, including the softening-point requirement
- Any additional property requirements (elastic recovery, storage stability, cold behaviour, ageing)
- Quantity
- Destination port and preferred Incoterm
- Packaging preference and inspection requirements
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