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.
Check Out Other SEALANT AND TAPE Products
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 |



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