FAQs

ModBit is a multi-layer roofing membrane system normally composed of insulation, a base sheet and a cap sheet. The base sheet is made of a fiberglass or reinforced polyester mat coated with modified bitumen asphalt. The asphalt is modified or enhanced with plastic or rubber polymer for waterproofing, extra strength, flexibility and durability. Base sheets are available in rolls of up to 36 feet and are surfaced with cap sheets of heat-weldable film, sand or a release film depending on the application requirements.

It offers superior waterproofing because its layers are sealed down to the roof so that there are no seams.

Bitumen is a broad term for a viscous, black hydrocarbon substance, which can be naturally occurring or derived from petroleum. It is used in various applications, including paving and roofing. In roofing, it’s often used in built-up roofing (BUR) systems and is a component in modified bitumen membranes that are the foundation of modified bitumen rolled roof systems. Often used interchangeably with “asphalt,” the term most used in American English.

Asphalt is a specific type of bitumen, often used in built-up roofing (BUR) systems and is a component in modified bitumen membranes that are the foundation of modified bitumen rolled roof systems. Often used interchangeably with “bitumen,” the term most used in British English.

The key difference is that bitumen is a component of asphalt. Asphalt is a composite material made of bitumen (a binder), aggregates (like sand and gravel) and sometimes fillers. Bitumen is a black, sticky substance derived from petroleum, used as the binding agent in asphalt. Essentially, bitumen is the glue that holds the asphalt together. 

APP (atactic polypropylene) is a type of polypropylene characterized by its random arrangement of methyl groups along the polymer chain. This differs from other forms of polypropylene like isotactic and syndiotactic, where the methyl groups have a more regular pattern. Because of its flexible, rubbery nature, it’s a key component in the production of modified bitumen for roofing materials, often in combination with other polymers.

IPP (isotactic polypropylene) is a widely used thermoplastic polymer known for its low cost and good mechanical properties. It’s a type of polypropylene  in which all the methyl groups are on the same side of the polymer backbone. It is most often used in a blend with other polymers. 

There is no charge for sample testing in our polymer laboratory. Typically, sampling is done on a first-come, first-serve basis. We will notify you when we test your sample.

There is no charge for sample testing in our laboratory.

Asking through email is the best way to coordinate our representatives being present during your laboratory testing of your sample.

Our regular portfolio is un-vulcanized rubber. From time to time, we carry vulcanized products such as bladders.

Each rubber type has a specific hardness rating depending on its formulation and intended use. Please contact us for detailed specifications on rubber.

Vulcanization needs to occur in order for the rubber to harden and be used as a finished product.

All of our products are tested and documented for quality control by our laboratory technicians at our location. This results in offering quality products to our customers.

Length: Polyester and fiberglass (3000 linear feet min to 22000 linear feet max) 

Thickness: Polyester (140g/m2 to 200g/m2) / fiberglass (80g/m2 to 100g/ m2) 

Weight: Polyester (500lbs to 200lbs) / fiberglass (1600lbs to 200lbs)

Uniformity: Both materials aim to be uniform in material thickness throughout the entire length of the roll. Due to the nature of recycled material, some slight variance can be expected.

Yes, our polyester rolls are made from recycled PET.

Melt flow refers to the rate at which a thermoplastic material flows when melted. Melt flow is a measure of a material’s viscosity and processability during manufacturing. In roofing, a consistent melt flow ensures uniform extrusion and coating, which is critical for achieving reliable waterproofing and mechanical performance in membranes and sealants.

Ash content measures the inorganic residue left after a material is burned at high temperatures. It reflects the presence of fillers, reinforcements or contaminants. In roofing products, controlled ash levels help ensure consistent thermal stability, UV resistance, and mechanical strength.

Our polymer compound sizes vary based on customer request and product type. Pellet size ranges from 2 to 3.5 millimeters.

Products are securely packaged and loaded onto the customers freight medium for domestic or export. For detailed dimensions and shipping options, please contact our logistics team.