PHYSICAL AND CHEMICAL PROPERTIES
A 100% solids, polymeric, butyl based sealant material.
Aggressive Tack - assures positive positioning
and maximum surface contact.
Stable Configuration - will conform to surface
undulations and irregular joint areas, yet is not easily displaced under
Chemical Permanency - Low level of chemical
reactivity is reflected as water resistance, UV resistance, non-corrosivity
to metals, paint acceptance and the flexibility retention critical to
joints subjected to movement, dimensional shock and racking. Compatibility
with most plastics, foams and rubber as well as painted and unpainted
metal surfaces is excellent.
A sealant may be considered as a void-filling adhesive, Ductmate 440
tape was developed to provide a tough durable metal lap joint seal against
the ingress of water, dirt and the like. Typical applications include
sealing of duct flanges and laps in ductwork.
||99 +/- 1%
||1.40 +/- .15
||12 months minimum
||20 years minimum
||-50°C to 105°C
Tensile value of 0.09-0.12 N/mm² Cohesive at 25°C and compressed
to 50% (at the rate of 50mm/minute - Instron).
Infinite at room temperature; excellent at low temperature. (No cracking
or loss of adhesion to steel substrate at 40°C when bent 180°
within two seconds around a 12mm dia mandrel).
Passes. (Test requires material support a head of water approximately
20 KN/m² at 300% to 800% elongation).
25°C - in excess of 800% with a continuous film.
-15°C - a continuous film in excess of 200% (water frozen) and 300%
at water thaw.
ASTM Test Method D 217 is used to determine the degree of softness.
This involves evaluation of the sealant at low temperatures; workability
and handling properties at high temperatures.
|-15°C /300 grams/5 secs
|25°C /300 grams/5 secs
|50°C /300 grams/5 secs
Will not flow, slump or drip at elevated temperatures (105°C).
Retains excellent flexibility and exhibits no adhesion loss or appreciable
hardening following exposure in an Atlas Twin Arc Weatherometer in excess
of 3000 hours. (Cycle 102 minutes at high intensity UV followed by 18
minutes of high intensity UV combined with a water spray at a black
panel temperature of 60°C).
Retains excellent flexibility with no apparent loss of adhesion to galvanised
steel, aluminium or painted substrates. (Sandwiched panels compressed
to 1.5mm and aged for one year at 90°C).
No evidence of darkening, surface etching or salt deposition following
contact with aluminium, galvanised steel or copper (90°C, at 100%
Relative Humidity for 7 days).
No evidence of surface staining of painted substrates (UV exposure of
No visible 'bleed out'. (Metal to glass sandwich compressed 50% and
placed in an oven for 24 hours at 105°C).
No evidence of softening, adhesion loss or other adverse effects noted
following immersion in water at ambient temperature.
MIL-C-18960B, Type II, Class B equals or exceeds performance requirements.
MBMA - Ice Damming/Static Water Head Test - passes both simulated laboratory
test and full field test.