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MALARKEY 350 MINERAL SURFACE SILVERWOOD
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350 GR is a fire-rated (FR) cap sheet manufactured to meet the needs of a high quality built-up roofing system, or is usedas rolled roofing install or tile underlayment. 350 GR cap sheet can be applied with hot mopping asphalt or cold process adhesives.
Please consult Malarkey Technical Services for approval of roof systems when used as a cap sheet in a B.U.R. system. Approved foruse on all fire-rated built-up roofs.
Composition and Materials:350 GR is manufactured on fiberglass mat uniformly impregnated and coated on both sides with SBS-modified bitumen (asphalt) compounded with a fire-retardant mineral stabilizer and surfaced with ceramicgranules for ultravioletprotection and weatherability.
Weight/ Roll (nominal)
78 lbs (35.4 kg)
39¾ wide x 33’ long
(1M wide x 10.0M long)
Thickness 105 mils
Lay Line 2” (50.8 mm)
Granule Adhesion Max .5 gram loss
Permeance (Test ASTM E96) 0.00 g/m²/24hr
Colors Available in various shingle colors