Roofing Asphalt

The Ancient Mesopotamians had it right when they began using asphalt to waterproof temple baths and water tanks.  The Phoenicians later found asphalt useful in caulking the seams of their merchant ships.  And when they needed to seal their baths, reservoirs, and aqueducts, guess what substance the Romans relied on?  Thousands of years later, asphalt has a proven track record documenting its ability to resist water penetration.  Asphalts (Bitumen) have been successfully used as a waterproofing agent for many millenniums.  It is without a doubt the most successful waterproofing agent in history.

Research & Development have made huge improvements since the advent of “Oxidizing” asphalt at the turn of the 20th century.  When oxidized it could be modified to achieve thermal, performance and longevity desired in low slope roofing systems as well as for use in asphalt shingles for steep slope roofs. Today laboratories have designed even more exotic blends for granule retention and to have the asphalt have a “memory” to withstand the many thousand thermal swings roofing systems experience.

United Asphalts manufactures and sells four standard types of built-up roofing asphalt.  They are Types 1, 2, 3, and 4.  These are available in both carton and bulk form.  All of our products are made from high grade U.S. crude oil and they meet or exceed ASTM D-312-15 specifications.  All products are tested on a daily basis by our in house laboratory before a Product Quality Guarantee is issued.  Each carton and the bill of lading on bulk asphalt provide important safety information as well as important application temperature information (EVT and heating) and the type of asphalt.


Specification Data - Roofing Asphalt Carton and Bulk - ASTM D-312-16

  Type 1
No Smell/Regular
Type 2
No Smell/Regular
Type 3
No Smell/Regular
Type 4
No Smell/Regular
  Min. Max. Min. Max. Min. Max. Min. Max.
Softening Point (F) 135 151 158 176 185 205 210 225
Flash Point (F) 575 - 575 - 575 - 575 -
Penetration @ 77 (F) 18 60 18 40 15 35 12 25
Ductility @ 77 (F) 10 - 3.0 - 2.5 - 1.5 -
Solubility in Trichloroethylene % 99 - 99 - 99 - 99 -
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