How do I know what crack sealant to use in my area?
Go to the Crafco sealant selection guide in the sealant section
of the Crafco web site.
Why is the crack sealant coming out of the crack
after it has cooled?
Most likely the crack was either wet or dirty. Sealant will not
stick to either.
Can I crack seal in cold weather?
Yes you can, if you follow a few simple suggestions. If the
temperatures are below freezing the biggest challenge is
moisture. It is very hard to see if it is frozen. Test the
pavement with a torch or a heat lance. Warm the pavement, then
remove the heat source. Observe the area for moisture signs for
a minute or two. If the pavement looks damp the sealant will not
stick. If you determine the pavement is dry, heat the sealant to
the upper end of the safe heating temperature and seal. The use
of a heat lance is always recommended in cold weather. Always
follow the Crafco recommended installation instructions.
Why should I rout my
cracks before I seal/fill them?
By routing the cracks you remove the oxidized fractured pavement
from the crack surface and expose intact vertical walls for the
sealant to bond to. The increased area of sealant in the crack
also accommodates for more movement. This will extend the
sealant's service life by up to 50% over non-routed cracks.
Can I use a SuperShot Melter to
apply the Superseal Hot Applied Fuel Resistant Sealants (Superseal
444/777 and Superseal 1614A)?
No, primarily for two reasons:
The location of the intake of the material pump is 1.5
inches above the bottom of the tank and you are not able to pump
all of the material out of the tank. The Superseal Hot Applied
Fuel Resistant Sealants are not re-heatable sealants and all of
the sealant (Superseal Hot Applied Fuel Resistant Sealants) must
be removed from the melter and cleaned (Crafco Superseal
Flushing Oil) after each application.
The Superseal Hot Applied Fuel Resistant Sealants have to be
constantly agitated, starting when the sealant is put into the
melter. The SuperShot units have a safety interlock system to
protect various components on the machine. Part of this system
does not allow the agitator to turn until the sealant
temperature reaches 275°F.
If the Superseal Hot Applied Fuel Resistant Sealants is not
continuously agitated it will overheat and gel in the melter,
resulting in a long and costly clean up process.
When should I use a thick
sealant instead of a thin one?
Crafco supplies both thick and thin sealant for
various applications. Thicker sealant generally contains ground
tire rubber as a thickening agent. Thicker sealant with ground
tire rubber contains the same rubber that makes your automobile
tires last for thousands of miles. This is a good thing.
Sealants such as Asphalt Rubber Plus and PolyFlex are great
sealants if they are to be placed in cracks over one quarter
inch wide and are within the proper climate range. See the
Crafco sealant selection guide.
Why is my crack sealant tracking or pulling out of the crack?
In most cases the
wrong sealant for your application was used, or it has not
cooled properly. If the sealant is too tacky for the specific
application but is a Crafco recommended product for the area, a
simple application of Crafco Detack is the solution. If the
sealant is pulling out of the crack after it has cooled, the
crack is most likely wet or dirty. See our installation
instructions or a Crafco representative for more details.
How big should a crack be before it needs to be sealed?
Any crack will let
water into the sub base. The larger the crack the more water
will go through it. Water in the base is a killer of pavements
so we recommend all cracks be sealed regardless of size. Every
crack wants to be a pothole when it grows up.
Where can I find a sealant usage calculator?
Click on sealant button located to the left. Scroll down to the
bottom of the page and click on “sealant usage calculator”.
does crack sealant cost so much? Crafco crack
sealant is made from liquid asphalt, oils, polymers, extenders
and in some cases, recycled rubber. The costs for most of these
items has risen 100-300% during 2007 and 2008. In these
volatile times we attempt to supply the finest sealants at a
fair price. Crack sealing continues to be the most cost
effective pavement preservation method you can use. Cracks lead
to potholes and potholes are very bad. Seal the cracks.
What should I do if I'm asked
to provide a product that meets specification ASTM D6690?
Crafco manufactures several sealants that
meet the ASTM D6690 specification. Some are climate specific
and others are thicker or thinner, while some contain recycled
tire rubber and others do not. See our sealant specification
guide by clicking on the sealant button to the left in order to
find the product that best meets your needs.
two applicator hoses be installed on a machine that has only one
sealant pump? No, but select units do have an option
for a second pump and applicator hose. Additionally, on the EZ
Series II 1500 you can have two standard hoses, two electric
hoses or one of each depending on options ordered on machine.
an EZ Series II machine, can I switch from a heated to a
non-heated hose. Yes, all EZ Series II machines that
are ordered with an electric hose/wand have the option of
switching over to a non-electric hose/wand. However, a machine
that is ordered with only a standard non-electric hose/wand does
not have all the components necessary to install an electric
Why is there unmelted sealant bag in my machine?
Bag can accumulate around the agitator if new sealant blocks
are added to sealant that is below the recommended application
temperature or if sealant blocks are added to a cold machine and
then heated. In both cases, if you heat the sealant to the
proper application temperature, the bag will melt. The other tip
is to only add new sealant to product that is at or above the
minimum application temperature.
Why is my melter heating slower than is used to?
are two common answers to this question and both are easy to
check. First is the heat transfer oil. When was it changed last?
If the answer is more than 500 hours ago, go to your manual and
change the oil according to the instructions. Next is the
material tank. Does it have a coating of hard sealant on the
sides? If so, again go to the manual and clean according to the
directions or call your local Crafco representative. This
coating will interfere with the transfer of heat to the sealant.
Why are my router cutters wearing unevenly?
running the router too slowly. The cutters will not spin
properly unless you move relatively quickly and hear a hammering
sound from the cutters.
Can I use my router as a saw cutter?
We have a saw
cutting attachment for the Model 200. see your local Crafco
representative or click on the equipment button to the left for
Can I use a Crafco machine to heat and apply fiber sealants?
Yes you can. We recommend using an EZPOUR or EZ Series II to
apply fiber sealants. We also recommend the use of Crafco
PolyFiber Sealant so you assure yourself the proper mix and
How long does it take to change a pump on a SuperShot
The actual change time should not exceed two
hours. We suggest a complete and thorough cleaning of the inside
of the material tank anytime you change pumps. This operation
may take from one to four additional hours but will increase
heat up time significantly.
Can I allow heat transfer oil to contaminate the soil or
NO. Some equipment manufacturers build units
specifically designed to allow heat transfer oil to escape the
machine. You could be fined or go to jail for it. Consult your
local regulations for proper disposal. All Crafco melters have
an overflow tank designed specifically to prevent oxidation of
the HTO and to not allow it to be lost.
Should I get an air compressor option with my melter
With the price
of fuel the way it is today it makes no sense not to. First, you
will save the cost of a vehicle to tow an air compressor.
Second, it will save the cost of a driver for that same vehicle.
Third, you will save the cost of the fuel for the compressor.
Only you know what these costs are but if you add them up, the
costs will shock you. Only Crafco uses industrial type
compressors designed for everyday and all day use and offers
them at a fair price. Get the compressor option, it will pay for
itself in a few weeks.
Can I keep the burner lit on my melter while transporting it
to the job site?
No. the wind
will affect the heating system. It is unsafe and not
does the temperature continue to climb upwards after the burner
shuts off? The heat transfer oil should be set
higher than the sealant temperature to expedite sealant
melting. If additional sealant is not put into the melter, the
sealant temperature will begin to move towards the HTO
temperature and will stabilize at about 50-75°F below the HTO
Why should I use the more expensive "wide
hub" router cutter? You will get a cleaner cut with
less wobble from the cutter and this will most likely cause you
to use less sealant. Spacers are also included with each set,
as compared to the standard carbide cutter that does not include
them. The wide hub cutters have, in most applications, last
10-30% longer than the standard carbide cutter.
Why won't the
SuperShot burner come back on with the material temperature set
and the HTO temperature set at 500°F?
If the material temp. is over 400°F, the burner will not come on
until material temp. is under 400°F. If the HTO temp. is over
500°F, the burner will not come on until HTO temp. is under
does sealant continue to drip out of the end of the SuperShot
wand after trigger has been released? On a SuperShot
there are no valves that open or close from the sealant pump to
the end of the wand. To stop sealant flow after releasing the
trigger use a Crafco Dripless Tip Adapter, which includes part
numbers 27114, 27115 & 50270