Oxidized Bitumen 75/25: Applications and Buyer Checklist
Oxidized Bitumen 75/25 is an industrial bitumen used in selected waterproofing, roofing, coating and sealing formulations. For buyers, choosing this grade involves more than checking the product name: the specification, intended application, packaging and batch documentation all matter.
This guide explains what the grade designation means, where the material may be used and seven checks to complete before confirming an order.
What Is Oxidized Bitumen 75/25?
Also called blown bitumen or blown asphalt, oxidized bitumen is produced through controlled air blowing of petroleum bitumen. This process changes its consistency and increases its softening point relative to the feedstock.
The designation 75/25 refers to a nominal softening point of approximately 75°C and a nominal penetration value of approximately 25 dmm, measured under specified test conditions.
Published supplier specifications commonly show a softening-point range of 70–80°C and penetration of 20–30 dmm. These are reference ranges; the limits accepted for an Alps Asphalt order must be confirmed in the agreed product specification.
The softening point is a laboratory measurement. It should not be treated as a guaranteed maximum service temperature or a recommended heating temperature.
Main Applications
Roofing and Waterproofing Compounds
This grade can serve as a binder in selected roofing products, waterproofing compounds and moisture barriers.
The performance of the finished system depends on its complete formulation, reinforcement, installation and operating conditions. The grade name alone does not establish suitability for an exposed roof or a particular climate.
Industrial Coatings and Pipe Protection
Oxidized bitumen may be incorporated into bituminous coatings used for moisture protection and selected pipe-coating applications.
Buyers should confirm compatibility with the substrate, preparation method and coating system. Requirements for adhesion, flexibility and exposure resistance should be evaluated for the finished formulation.
Mastics, Adhesives and Sealing Materials
The material may also be used in selected mastics and adhesive or sealing formulations. Its suitability depends on the other ingredients and the required processing and performance characteristics.
Manufacturer application lists identify roofing, waterproofing compounds, pipe coatings, industrial paints and mastics among the uses of this grade. These uses remain formulation-dependent.
Seven Essential Buyer Checks
1. Confirm the Intended Application
Describe what you plan to manufacture or apply.
A request for roofing-compound production may involve different requirements from a request for an industrial coating. Share the formulation requirements or customer specification where available.
For a new application, evaluate a representative sample before committing to a commercial shipment.
2. Agree on the Complete Specification
Do not approve a purchase using the grade designation alone. Request a Technical Data Sheet and agree on the acceptance limits and test methods.
| Property | What the Buyer Should Confirm |
|---|
| Softening point | Accepted range and test method |
| Penetration | Accepted range and test conditions |
| Flash point | Required minimum and test method |
| Solubility | Required limit, solvent and test method |
| Loss on heating or other ageing test | Applicable procedure and acceptance limit |
| Additional properties | Any requirements specific to the application |
For example, published data sheets use ASTM D36 for softening point and ASTM D5 for penetration. Other requirements vary between suppliers, so the final specification should identify the methods and limits explicitly.
A typical value describes expected product characteristics. An acceptance limit defines whether the supplied material meets the agreed requirement.
3. Request a Batch-Specific COA
A Certificate of Analysis (COA) should report results associated with the supplied batch or lot.
Check that it identifies:
- The product and grade.
- The batch or lot reference.
- The properties tested and their units.
- The test methods.
- The measured results.
- The issuing laboratory or producer.
Compare the results with the agreed specification. A general Technical Data Sheet does not replace batch-specific test results.
If laboratory approval is required before dispatch, include that condition in the purchase agreement.
4. Specify the Packaging Clearly
Confirm the packaging offered for the particular product and shipment. Depending on the supplier’s arrangements, options may include drums, bags or other suitable formats.
For drums, agree on:
- Drum type and closure.
- Net product weight per drum.
- Empty drum weight and gross weight.
- Pallet requirements.
- Marking and labeling.
- Compatibility with the buyer’s unloading or melting equipment.
If a particular drum design is required, attach a photograph and dimensional requirements. A reference photograph helps communicate the request, but written specifications are needed for approval.
5. Review Handling and Processing Requirements
Request the current Safety Data Sheet (SDS) and product-specific processing guidance before handling the material.
Confirm the recommended heating procedure, equipment compatibility and storage conditions with the supplier and your technical team. Avoid selecting a processing temperature solely from the softening-point value.
Any packaging material that may enter the production process must also be assessed for compatibility with the formulation and equipment.
6. Define Quantity and Delivery Scope
State the quantity in metric tons of net product and identify the destination port or delivery location.
The quotation should clearly describe:
Preparation, dispatch and arrival are separate milestones. Clarifying them helps both parties plan the order.
7. Confirm Approval and Payment Conditions
Before issuing or accepting a proforma invoice, agree on the approval process and commercial conditions.
Clarify whether the buyer requires sample approval, COA review, packaging approval or independent inspection before shipment. Confirm payment timing, quotation validity and how any specification discrepancy will be handled.
Recording these requirements early reduces the risk of delays after production or packing has started.
Purchase Inquiry Checklist
Use this table when requesting a quotation:
| Required Detail | Buyer’s Information |
|---|
| Product | Oxidized Bitumen 75/25 |
| Intended application | |
| Quantity in net MT | |
| Required specification | |
| Packaging and net weight per unit | |
| Destination and delivery term | |
| Required shipment schedule | |
| COA and inspection requirements | |
| Proposed payment terms | |
Attach the technical specification and packaging reference when available.
Request Product Information from Alps Asphalt
Alps Asphalt | Producer, Supplier & Trader of Bitumen
For an Oxidized Bitumen 75/25 inquiry, send your application, quantity, required specification, packaging and destination. Include any sample, laboratory or pre-shipment approval requirements so they can be reviewed before order confirmation.
Contact Alps Asphalt for specifications and a quotation.
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