APOC Weather-Armor SB-1 Self-Bond Roof Underlayment is your premium， all-purpose roof underlayment and leak barrier. Ideal for use under shingles， slate， wood shake or other steep slope roofing materials， SB-1 Self-Bond underlayment is engineered with high strength reinforcement， exceptional elasticity and a non-skid mineral finish. APOC Weather-Armor SB-1 Self-Bond Roof Underlayment is a blend of highly flexible and elastic polymers， performance grade bitumen， high strength glass reinforcement and anti-slip mineral surfacing. SB-1 is easy to install and utilizes a split release film for easier positioning， faster installation and clean lines.
Prevents leaks from ice damming
Ideal protection in valleys， eaves， rake edges， slate， and wood shake
Easy and fast installation
Self adhesive membrane with release liner
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