Do not be misled or misinformed about
"warm-applied, moisture-activated, one-part reactive" IG sealants. There are significant differences
between them, and Delchem D-2000 is in a class by itself both chemically and in the many features and benefits
it provides to IG fabricators and their customers.
D-2000 is a true hot melt Butyl IG sealant.
All other "reactive" IG sealants are either urethane-based or urethane-modified. As such, they contain
isocyanates or diisocyanates.
D-2000 has recently been credentialed as a DSE
(Dual Seal Equivalency) IG Sealant for use on Intercept® IG Technology.
Let's take a closer look at the factors and
attributes that make D-2000 the only representative of the next generation of IG sealants.
D-2000 has the lowest MVTR of any IG sealant
in the market today. The MVTR of D-2000 is 0.013 gr/100 in2/24 hr. Until the
introduction of D-2000, the "industry standard" for the lowest MVTR was polyisobutylene (PIB) with a MVTR of
0.015.
return to top
GPR (Gas Permeance Rate)
Once again, D-2000 has set a new standard!
The GPR (argon) for D-2000 is 0.0000574 gm Ar/m2/24 hr/mmHg. D-2000 demonstrates the lowest
GPR (argon) of any IG sealant; "reactive", two-part, or hot melt.
return to top
STRENGTHS
D-2000 provides outstanding adhesive,
cohesive, and structural strengths. D-2000, immediately upon application, commences to react with
atmospheric moisture, cross-linking and forming mechanical bonds and significantly stronger covalent chemical
bonds as well. The resulting strengths are comparable to and slightly surpass those of two-part IG
sealants.
return to top
DURABILITY
Millions of IG units have been fabricated with
D-2000. These IG units have been fabricated on routine production equipment at numerous commercial IG
fabrication facilities, in laboratories, and at selected equipment manufacturers. Units fabricated
for testing have been submitted to various independent testing laboratories, the in-house testing facilities
at commercial enterprises, and at various suppliers of IG unit components.
Tested units passed CBA testing at <-90 F
across the board. Some units have undergone the equivalent of 20 consecutive CBA cycles.
Upon the completion of each cycle, a dew point (frost) could not be determined at <-90 F. The
units are now in their 21st consecutive CBA cycle. If one accepts the industry norm that 1 week of CBA
testing equates to 1.2 years of field service life and a CBA cycle approximates 7 weeks, then many more
new standards will be set with D-2000.
Many units fabricated with D-2000 have been "butterflied",
some within minutes after fabrication, others hours, days, weeks, and months later. D-2000 demonstrated
outstanding adhesive, cohesive, and shear strengths in all the units.
Units made with Intercept®
IG System technology were especially demonstrative of such strengths. As the sealant (D-2000) was being
stressed to cohesive failure, the spacer was deformed before cohesive failure could be attained. Other
spacer materials demonstrated similar tendencies when the unit was "butterflied."
D-2000 IG units are still undergoing a wide
variety of tests, and successfully completing them. IG units fabricated (single sealed) with D-2000 on
an Intercept® line in Canada, passed all criteria for meeting IGMAC Product Certification
(CAN/CGSB-12.8-97). The manufacturer has received full IGMAC credentials. Furthermore, the same set of
test units have successfully completed three additional consecutive weathering cycles with excellent
results. Another set of IG units fabricated with D-2000 at a different Intercept®
facility in Canada are currently undergoing IGMAC testing with excellent interim results.
D-2000 has
successfully completed 85+ consecutive weeks of exposure in a P1 chamber (continuous conditions; 140° F, water
spray, UV radiation with an average 2500 microwatts per centimeter2). Tested at monthly
intervals, the test units have yet to demonstrate a dew point at -95° F, any degradation of the sealant
and/or bond line, or exhibit discoloration or deterioration of the coated glass. The test units are
single seal (D-2000), aluminum spacer, one piece of clear glass, and one piece of low-e coated glass.
The Intercept® IG System is
a trademark of PPG Industries, Inc.
return to top
VERSATILITY
D-2000 is the most versatile IG sealant
available. D-2000 has
been successfully used with virtually all types of hot melt production
equipment.
Handgunning with 5-gallon and 55-gallon hot melt pumps from
every known pump/equipment manufacturer.
GED “Intercept” production lines; SMART extruders and
compensator types.
Aztech semi-automated gunning tables.
Lisec production lines.
Machine Design Concepts IG production equipment/systems.
Enduron tables.
D-2000 is also fully compatible, and used
with, all types of spacer materials/products:
Anodized aluminum
Aluminum
Plastic
Mill finish aluminum
Tin plated steel
Foam spacer
Stainless steel
Butyl sealant spacer
Galvanized steel
(Although
not required, D-2000 is also used in dual-seal configuration with PIB)
return to top
TEST
REPORT INTERPRETATION
What do test and evaluation data and
reports really mean? This
question needs to be answered on a number of levels.
First, passing a test (i.e., CBA, IGMAC, IGCC, minimal P-1
exposure, etc.) one time, as a qualifying criterion, is in reality,
misleading. It is much more meaningful and pragmatic to stress test units
to levels far beyond the initial “qualifying” test, which most
sealant manufacturers do not do.
Delchem does.
A significantly higher level
of confidence can be established when a set of units have completed
multiple, consecutive tests, and continue to be tested, showing
virtually no signs of degradation in continuous testing.
Secondly, the industry
generally accepts that one week in a test chamber such as P-1, CBA,
IGMAC weathering cycles, etc., equates to approximately one year of
field service life. Considering
that D-2000 units have completed 95 weeks, 168 weeks, 75 weeks, 96
weeks, etc. in various testing environments (test units include a wide range of variables in the IG unit
design; many different
types of spacer materials, argon and air filled, low-e glass, clear
glass, tempered glass, spacer with bent corners, nylon corner keys,
different desiccant fill levels, etc., etc.), it is realistic to
project that units made with D-2000, and good workmanship, will
provide, conservatively speaking, 50 + years of durable field
service-life, and more than likely, 100 years without unit failure.
Do not be mislead by a
statement that indicates a specific sealant meets or exceeds “the
criteria” or the “applicable standards” for a recognized test
protocol (i.e., ASTM E774, CAN/CGSB 12.8-97, etc.).
Too often, a single set of test units, tested one time, will
meet the criteria for a test protocol with minimal “passing”
credentials, while simultaneously demonstrating degradation of the
unit. What does this
mean? The one set of
units, barely passing the test criteria, is already beginning to fail.
Could this same set of units pass a second round of testing, a third
round, a fourth round? Realistically,
no.
Delchem continues to subject
sets of D-2000 test units to multiple, consecutive tests.
Moreover, the same set of units is frequently subjected to a
“battery” of test protocols (i.e., ASTM E774, P-1 Chamber, “Fog
Box”, etc.) versus a single protocol.
When told that a sealant “meets or
exceeds” applicable standards, ask to see test results
generated by a third-party, independent, accredited testing
lab. Better yet, ask to
see test reports showing that the same set of units have passed
multiple, consecutive tests as well as other protocols.
SEEING IS BELIEVING !
Technical Data Sheets, customer testimonials,
laboratory reports and other "pieces of paper" tell only part of the story about the many features and
benefits provided by D-2000.
A 10 minute video tape which vividly shows
many of the features and benefits provided by D-2000 is available upon your request.
Imagine fabricating an IG unit that
approximates 9' x 11', one inch air space, metal spacer, and SINGLE SEALED
with D-2000. Now, imagine that approximately 90 seconds after the D-2000 was applied, that the unit
(weighing approximately 500 pounds) is picked up in the horizontal plane by a suction cup crane, rotated into
the vertical plane, and moved 30 feet to a storage rack.
You don't have to imagine. This is the
routine production scenario for a long standing D-2000 customer, who routinely makes many IG units in this
manner daily, units of the size just cited, and larger.
The video shows two large units being
fabricated in the manner just described. But what will you really be seeing? You will witness:
- The outstanding initial green strength and
structural strength provided by D-2000.
- Large IG units that many in the industry
felt, until the advent of D-2000, could only be fabricated with a two-part sealant. Of course, if you
want to wait for hours for the two-part sealant to cure, you too could move them in the same manner as the
D-2000 units in the video tape.
- Handgunning application time for
D-2000 that is very expeditious.
- Rapid and easy "mending" of the unit's
corners by digital manipulation; no hot melt knife, no tedious reapplication of sealant, etc.
- Evidence that D-2000 is virtually tack-free
within 90 seconds after application.
D-2000, THE NEXT GENERATION OF IG SEALANTS !
return to top
For your complimentary copy of the D-2000
video tape, please contact John Matukaitis, Marketing Director, at Delchem.
email :
jmatukaitis@delchem.com
