Oxidized Bitumen 90/40

Oxidized Bitumen 90/40 Description

Oxidized bitumen 90/40 (in other words, Blown asphalt 90/40, blown bitumen 90/40) is Semi Solid grade of pure petroleum bitumen manufactured by air-blowing through an asphalt flux. Special physical properties of its grade can be used in different applications in the construction business. blown asphalt 90/40 is based on petroleum bitumen which is made by blowing asphalt 60/70 by very hot air. The numbers relate to the midpoint of the material’s softening point and penetration respectively. The softening point value is the degrees Centigrade measured by the Ring and Ball method as determined by ASTM D36. The penetration value is in 1/10 mm as determined by IP49 or ASTM D5.
Oxidized Asphalt is a solid or semi-black solid material and gradually liquid when heated, oxidized asphalt is the predominant content bitumen, asphalt, molten (oils), and aromatic resins. The oxidized asphalt or blown asphalt is producing in different softening point and penetration.

Oxidized Bitumen 90/40 Applications

Blown Asphalt 90/40 is a semi-solid oxidized grade of pure petroleum bitumen categorized in polycyclic aromatic hydrocarbons that are normally used for different purposes in the construction business.

Blown Asphalt 90/40 is widely used as an anti-slip layer compound in the piling industry, for the manufacture of roofing felts, the roofing and waterproofing industries, for sound dampening felts and undercarriage sealant in the automotive industry, electric cable joint protection, joint filling compound, carpet-backing, corrosion protection, acoustic panels, chemical, fuel, Manufacture of paints, sealant compound, and many others. Also used in sealing saw cuts and joints where expected movements are minimum. It is also used in the manufacturing of bituminous marine mastic for the oil & gas pipeline joints. Further, Blown Asphalt is used in the manufacture of bituminous marine mastic, which is required for the oil and gas pipeline joints.

Blown Asphalt has several usages in the industry

Oil and Gas industries:

• Coating materials for pipelines and pipe joints of Oil Also Gas Pipelines.

Electrical industries:

• The sealant of wire coating

Waterproofing industries:

• Building roofing felts in factories and first materials components who are producing waterproofing roofing felt sheets

Bitumen and Asphalt:

• Road paving, Asphalt, construction.
• Making Sound insulation layers.
• Car tires and lining.

Technical Advantages of Oxidized Bitumen 90/40

• Durability
• Flexibility
• Water Resistant
• Chemical Stability

Compared to paving grade bitumen:

• Reduced temperature susceptibility
• Exhibits a more ‘solid’ nature at ambient temperatures
• High penetration index

Recommendations for Handling / Storage

The heating of packaged bitumen is a critical phase in most of the final uses. Typically, the packaged material is heated and melted in boilers out on site.

However, control at the heating phase is very important in terms of health and safety as well as in maintaining the quality of the product.

A note must be taken of the maximum safe handling temperature of 230 C and this should not be abused. Bitumen is a poor conductor of heat, consequently, control of the heating phase is of paramount importance.

The Oxidized Bitumen material should be broken up prior to placement in the boiler. This exposes a larger surface area to the heat and encourages a more even heating regime. Without the larger exposed surface area, aggressive heating at the base and sides of the boiler may well result in localized overheating, altering the characteristics of the RAHA modified bitumen, and potentially causing thermal cracking of the bitumen, creating the release of low lash vapors. The flashpoint of the oxidized bitumen then becomes irrelevant; as these low flash vapors determine the fire risk.

Melted bitumen should not be left in the boiler and reheated from cold, as there is then a high potential for localized overheating around the heating area (lack of convection means poor heat transfer) and potential development of a pressurized pocket of low flash vapors.

Be aware of the placement of any temperature monitoring or control devices. As a result of the poor thermal conductivity of the bitumen, a thermometer in the bitumen some distance from the heat source could read significantly different (even hundreds of degrees) from the true temperature of the bitumen near the heat source.

For Health and Safety information, please make reference to the relevant MSDS.

Health & Safety

Workers should wear protective masks, gloves, and goggles during application. The asphalt can be removed from equipment and tools with kerosene or gasoline. Care should be taken when heating Blown Asphalt 90/40 to avoid overheating.

Packing of Oxidized Bitumen 90/40

Blown Asphalt 90/40 in various packing, including bitumen 90/40 is available in 20 & 50 kg Kraft Paper Bags / Poly Amide Bags, 25 kg Carton box, and 150, 180, 200kg Steel Drums. In addition, oxidized bitumen packing also palletize, 40 bags can stack on the pallet. 20 pallets can load to the 20ft container.

Technical Data Sheet of Blown Asphalt 90/40

Bitumen 90/40	Test method	Unit	Specification
Specific gravity @25/25 C	ASTM D70	(Kg/m3)	1.05 approx.
Penetration @ 25°c	ASTM  D5	mm/10	35/45
Softening point °c	ASTM  D36	°C	85/95
Ductility @25 °c	ASTM  D113	Cm	5.5min
Loss on heating(wt) %	ASTM  D6	Wt. %	0.2 max
Flashpoint c	ASTM D92	°C	250 min
Solubility is CS2(wt) %	ASTM  D4	Wt. %	99.5 max
Spot test	A.A.S.H.O.T102	—	Negative

Oxidized Bitumen 95/25

Oxidized Bitumen 95/25 Description

Oxidized Bitumen 95/25 is Semi Solid grade of pure petroleum bitumen manufactured by air-blowing through an asphalt flux. Special physical properties of its grade can be used in different applications in the construction business. Oxidized bitumen95/25 is based on petroleum bitumen which is made by oxidized bitumen 60/70 by very hot air. The numbers relate to the midpoint of the material’s softening point and penetration respectively. The softening point value is the degrees Centigrade measured by the Ring and Ball method as determined by ASTM D36. The penetration value is in 1/10 mm as determined by IP49 or ASTM- D5.

oxidized Bitumen is industrial bitumen which is dark, petroleum residue modified by the oxidation process. Oxidized Bitumen is produced by passing air through bitumen under controlled temperature conditions. Its consistency ranges from highly viscous to solid. Blown bitumen grade has technical advantages such as durability, flexibility, water-resistant and chemical stability. There is a different grade of blown bitumen.

Oxidized Bitumen 95/25 Applications

Oxidized Bitumen 95/25 is widely used as an anti-slip layer compound in the piling industry, for the manufacture of roofing felts, the roofing and waterproofing industries, for sound dampening felts and undercarriage sealant in the automotive industry, electric cable joint protection, joint filling compound,  carpet-backing, corrosion protection, acoustic panels, chemical, fuel, Manufacture of paints, sealant compound, and many others. Also used in sealing saw cuts and joints where expected movements are minimum. It is also used in the manufacturing of bituminous marine mastic for the oil & gas pipeline joints. Further, Oxidized Bitumen is used in the manufacture of bituminous marine mastic, which is required for the oil and gas pipeline joints.

• Oxidized bitumen is used as a sealing of expansion joints.
• Oxidized bitumen is used as a repair of joints or cracks.
• Oxidized bitumen is used as a fixation of parquet floors.
• Oxidized bitumen is used as an adhesive to be used in thermal insulation.
• Oxidized bitumen is used as a repair of unexposed cracks.
• Oxidized bitumen is used as bonding of wet briquettes
• Oxidized bitumen is used in various industries like roofing, isolation, insulation flooring, mastics, pipe coatings, electrical applications.

Technical Advantages of Oxidized Bitumen 95/25

• Durability
• Flexibility
• Water-Resistant
• Chemical Stability

Compared to paving grade bitumen:

• Reduced temperature susceptibility
• Exhibits a more ‘solid’ nature at ambient temperatures
• High penetration index

Storage/handling of oxidized bitumen 95/25

bitumen 95/25 has 10 years validity with multi-time heating and cooling, please refer to MSDS.

Packing of Blown Asphalt 95/25

Various pickings are available for customer’s purpose and conveniences. oxidized bitumen 95/25 in various packing including Kraft bag, meltable plastic bag, drum, and bulk bitumen 95/25 from penetration grade bitumen, which is blown by hot air in a controlled process until the desired specification is reached. oxidized bitumen 95/25 can be supplied in any grade and are designated by two numbers to indicate the softening point and penetration ranges. The bitumen grade 95/25 means the softening point is 95°c and penetration is 15 desi millimeter is produced in compliance and conformity with ASTM standard and meets the following specification.

Specification of Blown Asphalt 95/25

Analysis of bitumen 95/25

Bitumen 95/25	Test method	Unit	Specification
Specific gravity @25/25 C	ASTM D70	(Kg/m3)	1.05 approx.
Penetration @ 25°c	ASTM D5	mm/10	20/30
Softening point °c	ASTM D36	°C	90/100
Loss on heating(wt) %	ASTM D6	Wt. %	0.2 max
Flashpoint °c	ASTM D92	°C	250 min
Solubility is CS2(wt) %	ASTM D4	Wt. %	99.5 max
Spot test	A.A.S.H.O.T102	—	Negative

Oxidized Bitumen 105/35

Oxidized Bitumen 105/35 Description

Oxidized bitumen 105/35 is a good grade of oxidized asphalt to use as bonding compounds as hot melt adhesive at an application rate of approximately 1 Kg/m3 to bond the preformed sheets together and to structure which is made by Oxidized bitumen 60/70 by hot air. Blown bitumen 105/35 is a semi-solid oxidized grade of pure petroleum bitumen manufactured by air-blowing through an asphalt flux. Special physical properties of its grade can be used in different applications in the construction business.

Oxidized Bitumen 105/35 Applications

Oxidized bitumen 105/35 uses in the chemical, fuel, lacquers, varnishes, paper-pulp-board, textile processing, road construction, pavement, paint, crack seal and repairmen, civil works, roofing, construction business; sealing and insulating buildings, adhesive, construction materials additive, dust-binding, insulating and impregnating agent, make rubber and plastic products. The bitumen 105/35 products are for paving. also used in asphalt-based paints for corrosion protection of metals, inlining public works structures, adhesives in electrical laminates, the base for synthetic turf; typical uses for bitumen 105/35 used also for water-proof application and corrosion resistance for pipe coating, Portland cement pavement, hydraulic applications, paint manufacturing. Blown bitumen 105/35 is using the insulation and isolation bitumen membrane sheet. The car undercoating Automobile industry is especially required for blown bitumen. Vehicle undercoating material is based on Bitumen. Bitumen provides excellent waterproof, dustproof, and noise proof for automobile undercoating.
Blown Asphalt 105/35 should be heated double temperature against the softening point to be able to have flow and viscosity. To use blown bitumen 105/35, surfaces must be dry, clean, and free of loose particles, formwork, curing products, irregularities, slurry, etc.

Storage/handling of blown bitumen 105/35

bitumen 105/35 has 10 years validity with multi-time heating and cooling, please refer to MSDS.

Packing of blown bitumen 105/35

Different packing is available for the customer’s purpose and convenience. bitumen 105/35 in different packing including Kraft bag, meltable plastic bag, drum, and bulk. Blown asphalt 105/35 from penetration grade bitumen, which is blown by hot air in a controlled process until the desired specification is reached. bitumen 105/35 can be supplied in any grade and are designated by two numbers to show the softening point and penetration ranges. The bitumen grade 105/35 means the softening point is 105 and penetration is 35 desi millimeters is produced in compliance and conformity with ASTM standard and meets the following specification.

Specification of blown bitumen 105/35

Analysis bitumen 105/35

Bitumen 105/35	Test method	Unit	Specification
Specific gravity @25/25 C	ASTM D70	(Kg/m3)	1.05 approx.
Penetration @ 25°c	ASTM  D5	mm/10	30/40
Softening point °c	ASTM  D36	°C	100/110
Loss on heating(wt) %	ASTM  D6	Wt. %	0.2 max
Flashpoint c	ASTM D92	°C	250 min
Solubility is CS2(wt) %	ASTM  D4	Wt. %	99.5 max
Specific gravity @25/25 C	ASTM D70	(Kg/m3)	1.05 approx.

Oxidized Bitumen 105/15

Oxidized Bitumen 105/15 Description

Oxidized asphalt 105/15 (another word, blown asphalt 105/15, oxidized bitumen 105/15) is Semi Solid grade of pure petroleum bitumen manufactured by air-blowing through an asphalt flux. Special physical properties of its grade can be used in different applications in the construction business. Oxidized asphalt 105/15 is based on petroleum bitumen which is made by blowing bitumen 60/70 by very hot air. The numbers relate to the midpoint of the material’s softening point and penetration respectively. The softening point value is the degrees Centigrade measured by the Ring and Ball method as determined by ASTM D36. The penetration value is in 1/10 mm as determined by IP49 or ASTM- D5.

Oxidized Bitumen 105/15 Applications

Oxidized asphalt 105/15 uses in the chemical, fuel, paints, lacquers, varnishes, paper-pulp-board, textile processing, road construction, pavement, crack seal and repairmen, civil works, roofing, construction industries; sealing and insulating buildings, adhesive, construction materials additive, dust-binding, insulating and impregnating agent, make rubber and plastic products. The oxidized asphalt 105/15 products are for paving. also used in asphalt-based paints for corrosion protection of metals, inlining public works structures, adhesives in electrical laminates, a base for synthetic turf; typical uses for asphalt 105/15 used also for water-proof application and corrosion resistance for pipe coating, Portland cement pavement, hydraulic applications, paint manufacturing, caulking, mastics, and damp proofing. Asphalt 105/15 is using the insulation and isolation bitumen membrane sheet. The car undercoating Automobile industry is especially required for Blown Asphalt. Vehicle undercoating material is based on Bitumen. Bitumen provides excellent waterproof, dustproof, and noise proof for automobile undercoating. The oxidized asphalt 105/15 should be heated double temperature against the softening point to support have flow and viscosity. To use asphalt 105/15, surfaces must be dry, clean and after loose particles, formwork, curing products, irregularities, slurry, etc.

Technical Advantages of Blown Bitumen 105/15

• Durability
• Flexibility
• Water-Resistant
• Chemical Stability

Storage and Handling

The heating of packaged bitumen is a critical phase in most of the final uses. Typically, the packaged material is heated and melted in boilers out on site.

However, control at the heating phase is very important in terms of health and safety as well as in maintaining the quality of the product.

The note must be taken of the maximum safe handling temperature of 230 C and this should not be abused. Bitumen is a poor conductor of heat, consequently, control of the heating phase is of paramount importance.

The Blown Bitumen material should be broken up before placement in the boiler. This exposes a larger surface area to the heat and encourages a more even heating regime. Without the larger exposed surface area, aggressive heating at the base and sides of the boiler may well result in localized overheating, altering the characteristics of the modified bitumen and potentially causing thermal cracking of the bitumen, creating the release of low lash vapors. The flashpoint of the oxidized bitumen then becomes irrelevant; as these low flash vapors determine the fire risk.

Melted bitumen should not be left in the boiler and reheated from cold, as there is then a high potential for localized overheating around the heating area (lack of convection means poor heat transfer) and potential development of a pressurized pocket of low flash vapors.

Be aware of the placement of any temperature monitoring or control devices. As a result of the poor thermal conductivity of the bitumen, a thermometer in the bitumen some distance from the heat source could read significantly different (even hundreds of degrees) from the true temperature of the bitumen near the heat source.

For Health and Safety information, please make reference to the relevant MSDS.

Health & Safety

Workers should wear protective masks, gloves, and goggles during application. The asphalt can be removed from equipment and tools with kerosene or gasoline. Care should be taken when heating Blown Bitumen 105/15 to avoid overheating.

Blown Asphalt 105/15 CHARACTERISTICS

CHARACTERISTIC	Test method	Unit	Specification
Specific gravity @25/25 C	ASTM D70	(Kg/m3)	1.05 approx.
Penetration @ 25°c	ASTM D5	mm/10	10/20
Softening point °c	ASTM D36	°C	100/110
Loss on heating(wt) %	ASTM D6	Wt. %	0.2 max
Flashpoint c	ASTM D92	°C	250 min
Solubility is CS2(wt) %	ASTM D4	Wt. %	99.5 max
Spot test	A.A.S.H.O.T102	—	Negative

Blown asphalt 105/15 Packing

Various packings are available for customer’s purpose and conveniences. TAVOIL CO is the manufacturer of asphalt 105/15 in various packing including Kraft bag, meltable plastic bag, drum, and bulk oxidized asphalt 105/15 from penetration grade bitumen.

TAVOIL asphalt 105/15 perchance is supplied in any grade and is designated by two numbers to indicate the softening point and penetration ranges. The oxidized asphalt grade 105/15 means the softening point is 105 and penetration are 15 desi millimeters is produced in compliance and conformity with ASTM standard and meets the following specification.

Oxidized Bitumen 150/5

Oxidized Bitumen 150/5 Description

Oxidized bitumen 150/5 is based on petroleum bitumen which is made by blowing bitumen 60/70 by hot air. This type of bitumen is hard and breakable. Oxidized bitumen 150/5 is the semi-solid oxidized grade of petroleum bitumen categorized in polycyclic aromatic hydrocarbons is normally used for different purposes in the construction industries. bitumen 150/5 should be heated double temperature (200ᵒ-300ᵒC) against the softening point to be able to have flow and viscosity. Normally heating of such hard oxidized bitumen should be arranged via hot oil by circulation inside of the isolated jacket. Bitumen oxide 150/5 from penetration grade bitumen, which is blown by hot air in a controlled process until the desired specification is reached. HJ Oil oxidized bitumen 150/5 can be supplied in any grade and are designated by two numbers to indicate the softening point and penetration ranges. The oxidized bitumen 150/5 means the softening point is 150°c and penetration is 15 desi millimeter is produced in compliance and conformity with ASTM standard.

Oxidized Bitumen 150/5 Applications

This Grade of Oxidized uses in the chemical, raw material for bitumen coat, lacquers, varnishes, paper-pulp-board, textile processing, pavement, crack seal and repairmen, civil works, bitumen coat for piping, roofing, construction industries; sealing and insulating buildings, adhesive, construction materials additive, road construction, dust-binding, insulating and impregnating agent, isolation bitumen membrane sheet, make rubber and plastic products. bitumen 150/5 products are for paving, roofing; also used in asphalt-based paints for corrosion protection of metals, inlining public works structures, adhesives in electrical laminates, the base for synthetic turf; typical uses for bitumen 150/5 include roofing, pipe coating, hydraulic applications, 150/5 is mainly using in paint manufacturing and coating in the hot area.

Before using bitumen 150/5 surfaces must be dry, clean, and free of loose particles, curing products, irregularities, and slurry. If you use this type of bitumen without cleaning the area the bitumen 150/5 will easily remove.

Blown Asphalt 150/5 Storage/handling

blown asphalt 150/5 has 10 years validity with multi-time heating and cold, please refer to MSDS. It is better to keep the bitumen 150/5 under shelter and out of the rain, the sun.

Blown Asphalt 150/5 Packing

bitumen 150/5 is available in 25 kg meltable and craft bag, drum, and bulk. Normally oxidized bitumen packing on the pallet and 40 bags can stack on the pallet. 20 pallets can load to the 20ft container.

Specification of Oxidized Bitumen 150/5

Analysis of Blown Asphalt 150/5

Bitumen 150/5	Test method	Unit	Specification
Specific gravity @25/25 C	ASTM D70	(Kg/m3)	1.05 approx.
Penetration @ 25°c	ASTM  D5	mm/10	4/6
Softening point °c	ASTM  D36	°C	145/155
Ductility @25 °c	ASTM  D113	Cm	1.5min
Loss on heating(wt) %	ASTM  D6	Wt. %	0.2 max
Flashpoint c	ASTM D92	°C	250 min
Solubility is CS2(wt) %	ASTM  D4	Wt. %	99.5 max
Spot test	A.A.S.H.O.T102	—	Negative

Health & Safety of Blown Asphalt 150/5

Workers should wear protective masks, gloves, and goggles during application. The asphalt can be removed from equipment and tools with kerosene or gasoline. Care should be taken when heating oxidized Bitumen 150/5 to avoid overheating.

Oxidized Bitumen

Oxidized Bitumen Description

Blown bitumen grade or Oxidized Bitumen are produced by passing air through the penetration grades. This process gives the bitumen more rubbery properties than its original formula and they are simply harder bitumen. Hard bitumen under controlled temperature conditions is widely used as an anti-slip layer compound in the piling industry, for manufacture of roofing felts, the roofing and waterproofing industries, for sound dampening felts and under carriage sealant in the automotive industry, electric cable joint protection, joint filling compound, sealant compound and many others. Also used in sealing saw cuts and joints where expected movements are minimum. It is also used in the manufacturing of bituminous marine mastic for the oil & gas pipeline joints.

The most popular grades are; 95/25, 85/35, 90/40 and 115/15. We are also capable of producing other grades of Blown Bitumen upon request by our customers. Blown Bitumen high softening temperatures qualify them as excellent sealant for prevention from bleeding in high temperature applications. Blown Grade Bitumen shall be broken up into small pieces (for blown grade in molded cake form) and heated slowly to the application temperature of 220ºC to 230ºC. blown Bitumen is predominantly used in the piling industry as an anti slip compound for the manufacture of under carriage sealants in the automobile industry. It is also used as a sealant compound, as a joint filling compound apart from being used in the manufacture of roofing felts and sound dampening felts. Further, Blown Bitumen is used in the manufacture of bituminous marine mastic, which is required for the oil and gas pipeline joints. blown Bitumen is available in different grades like 95/25, 85/25, 75/25, 90/40 and 115/15. Tavoil is also capable of producing other grades of Oxidized Bitumen according to the specifications of individual clients.

Oxidized Bitumen Characteristics

Some of the major advantages of Oxidized Bitumen are that it is completely water resistant, highly flexible and durable. Further, it is chemically very stable. blown bitumen is a very flexible compound that is not only chemically stable but also a very durable compound apart from being completely water resistant. Lastly, Blown Bitumen has some very prominent technical advantages that makes it a very sought after compound in various applications.

Blown Bitumen Applications

Oxidized bitumens are used almost entirely for industrial applications, eg roofing, flooring mastics, pipe coatings, paints, etc, and are specified and designated by both softening point and penetration tests.

• Used As a bonding bitumen for roofing sheet membranes.

• Used As a hot-applied waterproofing layer.

• Used in Carpet tile manufacture.

• Used As a raw material for liquid bitumen coatings.

• Used in production of bituminous paint, mastic.

• Used in rust proof pipe coatings.

• Used as an anti-slip layer compound in the piling industry.

• Used in production of roofing and sound dampening felts.

• Used as under carriage sealant in the automobile industry, electric cable joint protection, joint filling compound, sealant compound and much more in our day to day life.

We are also capable of producing other grades of Blown Bitumen upon request by our customers. Oxidized Bitumen high softening temperatures qualify them as the excellent sealant for prevention from bleeding in high-temperature applications. Blown Grade Bitumen shall be broken up into small pieces (for the blown grade in molded cake form) and heated slowly to the application temperature of 220ºC to 230ºC. Oxidized Bitumen is predominantly used in the piling industry as an anti-slip compound for the manufacture of undercarriage sealants in the automobile industry. It is also used as a sealant compound, as a joint filling compound apart from being used in the manufacture of roofing felts and sound dampening felts. Further, Oxidized Bitumen is used in the manufacture of bituminous marine mastic, which is required for the oil and gas pipeline joints. This Oxidized Bitumen is available in different grades like 95/25, 85/25, 75/25, 90/40 and 115/15. Oxidized is also capable of producing other grades of Oxidized Bitumen according to the specifications of individual clients

Oxidized Bitumen Grades are suitable for sealing saw cuts and joints where there is expected to be the minimum amount of moving in the joint. Their wide temperature range prevents bleeding in high-temperature applications. Oxidized bitumen can also be used in industrial applications like roofing, flooring, mastics, pipe coatings, electrical applications to name a few.

Oxidised bitumen ” Oxidized Bitumen, Oxidized Asphalt ” range is used in the waterproofing industries, for carpet-backing, corrosion protection, acoustic panels and the manufacture of paints, amongst other applications.

Air-blowing: The manufacturing process used to make oxidized roofing asphalts in which air is blown through an asphalt flux. An exothermic oxidation reaction occurs, yielding an asphalt that is harder, more viscous, less volatile, and less temperature-susceptible than the asphalt flux used as the feedstock to the process.

Asphalt, oxidized (blown or air-refined) (CAS number 64742–93–4): Asphalt treated by blowing air through it at elevated temperatures to produce physical properties required for the industrial use of the final product. Oxidized asphalts are used in roofing operations, pipe coating, undersealing for Portland cement concrete pavements, hydraulic applications, membrane envelopes, some paving-grade mixes [AI 1990b], and the manufacture of paints [Speight 1992].

Blowing still: A closed-process vessel fitted at its base with a sparger and used in the air-blowing process to make many types of roofing asphalt.

Coating asphalt: An air-blown or oxidized asphalt used to manufacture roofing materials used in a variety of roofing systems such as asphalt shingles, polymer-modified bitumen roofing, reinforcing and underlayment felts, and roll roofing products.

Modified bitumen: A roofing system based on membranes manufactured by impregnating or coating one or more fabric plies with a straight-run or oxidized asphalt modified using a polymer, usually atactic polypropylene (APP) or styrene-butadiene-styrene (SBS). Modified bitumen systems may be torch-applied or installed by adhesion in hot asphalt or a cold-applied, solvent-based asphalt adhesive (cutback asphalt). Modified bitumen systems are used on low-slope (primarily commercial or industrial) roofs.