EMSEAL AST HI-ACRYLIC

Features

AST is a self-adhering foam tape impregnated with water-based acrylic-modified asphalt emulsion
It is an excellent alternative to butyl tape & open-cell polyurethane foam strips
Will not dry out and become hard and brittle
UV-stable
Highly resistant to bugs and vermin
Will not extrude from between joints like caulk or butyl tapes
Conforms to contours and fills gaps
Maintains a seal during thermal expansion and contraction of building
panels
Excellent compressibility and recovery (minimal compression set)
Good thermal and sound insulator
No shrinkage or blow-out due to closed-cell breakage
Supplied with self-adhesive on one side. After removal of packaging,
material begins gradual expansion – more slowly in cold weather than in hot.

SUPPLIED SIZE	EXPANDED SIZE	LF/BOX	REELS PER BOX	REEL LENGTH
1/4” x 1”	1” x 1”	511.68 LF	26	19.7”
3/8” x 1”	1 1/2” x 1”	314.88 LF	24	13.1”

PROPERTY	VALUE	TEST METHOD
BASE MATERIAL	OPEN CELL, HIGH DENSITY, POLYURETHANE FOAM	N/A
IMPREGNATION	ACRYLIC-MODIFIED ASPHALT	N/A
COLOR	BLACK	N/A
TENSILE STRENGTH	21 PSI MIN (145 kPa)	ASTM D3574
ELONGATION - ULTIMATE	150% MIN	ASTM D3574
TEMPERATURE RANGE HIGH-PERMANENT HIGH-SHORT TERM LOW	185°F (85°C) 203°F (95°C) -40°F (-40°C)	ASTM C711
SOFTENING POINT	140°F MIN (60°C)	ASTM D816
UV RESISTENCE	EXCELLENT
MILDEW RESISTENCE	EXCELLENT
RESISTENCE TO AGING	EXCELLENT
BLEEDING -40°F TO 180°F (-40°F TO 85°F)	BLEEDING -40°F TO 180°F (-40°F TO 85°F)
COMPRESSION SET 70°C 50% RH AFTER 72HRS	3 % MAX	ASTM D3574
THERMAL CONDUCTIVITY	THERMAL CONDUCTIVITY	ASTM C518
LOW. TEMP. FLEXIBILITY 32°F TO -10°F (0°C TO -23°C)	NO CRACKING OR SPLITTING	ASTM C711
WATER VAPOR TRANSMISSION AT 25% COMPRESSION	0.011 PERMS	ASTM C355-64