AWS: Roof Coatings Commercial Roofing Flat Roofing Repair Metal Roof Repair

DESCRIPTION

BUTYL BRUSH GRADE 320 is a single component brush-able grade seam sealer specially formulated to provide a waterproof, weather resistant membrane with excellent permeability and ultra-violet protection. BUTYL 320 offers good elongation and tensile strength to resist lateral movement and allow for expansion and contraction of the substrate. It is specifically formulated to be a little less in viscosity than the Butyl Flashing Grade 321

RECOMMENDED USES

BUTYL BRUSH GRADE 320 is recommended as a protective vapor barrier seam sealer for a variety of situations, including all types of seams, fasteners, gaps between metal panels, gutters, vent pipe flashings, air conditioning units and expansion joints. Ideal for metal roof applications with visible rust and all types of flat roofing substrates.

APPLICATION INSTRUCTIONS

BUTYL BRUSH GRADE 320 may be applied by brushing or troweling. Apply BUTYL 320 only to clean, dry, sound surfaces free of loose particles or other foreign matter. BUTYL 320 can be used with any size fabric to help seal large cracks. Any of Weatherstar’s roof coatings may be applied within 12-24 hour of the application of BUTYL 320.

LIMITATIONS AND PRECAUTIONS

WARNING: This product contains VM & P Naphtha and Xylene. KEEP AWAY FROM HEAT, OPEN FLAME OR SPARKS. USE ONLY IN WELL VENTILATED AREAS WITH PROPER PROTECTIVE EQUIPMENT. Avoid breathing vapor or mist. Approved (MESA/NIOSH) chemical respirator and protective clothing must be worn by applicator and personnel in vicinity of the application.

TECHNICAL DATA

Color:	White
Viscosity:	50,000 cps
Tensile Strength:	500 ± 50 psi
Elongation:	500% ± 50%
Total Solids:	50% ± 2%
Flash Point:	68° F
Hardness:	55 Shore A
Permeability:	.005 perm inch
Shelf Life:	12 months @ 40° - 90°
Weight per Gallon:	8.2 ± .2 lbs. per gal.
Impact Resistance:	Exceeds 160 in/lb.
Clean Up:	Xylene
Service Temperature:	-50° to 200° F