Core 4 Technology
Double Sealant Lines
StormMaster
®
performs
better than standard
asphalt products
64%
Mechanical Uplift Lab Test Results
StormMaster
®
performs
better than standard
asphalt products
50%+
Core4 enhanced polymers, coupled with the Atlas double FASTAC®
adhesive sealant line, create a strong, thermally bonded roong system.
In mechanical uplift tests, shingles with
Core4 performed 64 PERCENT BETTER than
standard asphalt shingles.
StormMaster® shingles with Core4 come with
an up to 150 mph Wind Limited Warranty².
Fastener Pull-Through Lab Test Results
In fastener pull-through tests, which
examine the strength of the nail within
the Atlas 11/2" Sweet Spot™ nailing
area, shingles with Core4 performed
more than 50 PERCENT BETTER than
standard asphalt shingles.
StormMaster® shingles with Core4 carry a UL
2218 Class 4 Impact rating from Underwriters
Laboratory. The test consists of simulating the
speed and terminal velocity of a 2 inch hail stone
falling from the sky. To meet Class 4 Impact criteria, the shingle must
show no evidence of fractures or cracks on the back side.
UL 2218 Class 4 Impact
Resistance Test
Standard Asphalt
Products