DURABAK™ Safety Coatings
For Specific Adhesion
The Care and Maintenance|
of DURABAK™ Surfaces
|Please contact us for additional technical assistance|
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DURABAK™ Spec Sheet
Photos of DURABAK™ In Use
"Road and Bridges" Article
NOTE: Surface preparation and application instructions for both DURABAK™ and DURABAK 18™ is identical unless otherwise noted.
IMPORTANT – READ CAREFULLY!
DURABAK™ will bond well to properly prepared, clean, thoroughly dry surfaces. On sound-painted surfaces, paint must be fully dried or cured to manufacturer’s specifications. The solvents in DURABAK™ will not soften or attack properly dried or cured paint. For fully-cured two-part epoxy substrates, contact COTE-L Industries or your DURABAK™ distributor before application. (First, see Paint and Varnish #5)
Always thoroughly clean the surface of all oily or waxy contaminants and use recommended cleaning solvent. Leave no residue. Always do a small test on the substrate to ensure adhesion.
NOTE: Due to the possibility of slight batch color variations, mix partially used cans of DURABAK™ with new cans as they are opened during applications.
DO’S AND DON’T’S
Use only Xylene cleaning solvent as last step before applying DURABAK™ , or to thin DURABAK™ if necessary.
Clean surfaces with lacquer thinners or any solvent containing alcohol, which will prevent DURABAK™ from curing and bonding.
Clean surface with strong aggressive detergent, rinse thoroughly, and let dry. Then use Xylene to wipe the surface as a last step. Allow solvent to evaporate.
Assume surface is clean unless you have cleaned it according to instructions.
Ensure surface is completely dry and/or catalyzed beforehand.
Test surfaces beforehand for adhesion with DURABAK™.
Shake can to mix. (Rubber granules will not mix evenly.)
Stir DURABAK™ thoroughly before application (preferably with an electric mixer) to keep rubber granules in suspension.
Keep DURABAK™’s rubber granules in suspension by stirring periodically.
Apply DURABAK™ in at least two coats. (Two coats is normally sufficient for most applications.)
SURFACE PREPARATION FOR SPECIAL ADHESION
IMPORTANT – READ CAREFULLY!
The following information is provided as a guide only, because substrates can differ significantly. All surfaces should first be tested to ensure adhesion. Contact COTE-L Industries for test design.
For best results, NEW concrete should:
OLD concrete should:
NOTE: For chemically-soaked concrete, or other unusually difficult surfaces, contact COTE-L
Sealed concrete should first be tested for DURABAK™ adhesion:
While it is not usually needed on concrete, a primer can provide enhanced adhesion. Contact
COTE-L Industries for specific information on surfaces to be primed.
CONCRETE PLUS PRIMER
DURABAK™ exhibits good adhesion to new acrylic and polyurethane
primers applied and overcoated to manufacturers recommendations. Check to make sure primer is
compatible with one-part moisture-cured polyurethanes. Be sure to apply
DURABAK™ within time specifications of primer manufacturer. Aim for
the first third of the recommended window of opportunity for overcoating.
All smooth metal should be thoroughly cleaned, aggressively roughened and primeds with an
etch primer which is compatible with moisture-cured polyurethanes.
DURABAK™ adheres well to cured painted metal. Most rough metal
surfaces such as pitted rust need not be primed; however, all loose scale should be removed.
COTE-L recommends that a small area be pre-tested with and without primer. On
applications of extreme wear, such as step nosings, a primer is highly recommended.
CAUTION! When priming metal surfaces, the primer must be fully dry before
overcoating. Careful attention must be given to manufacturer’s recommended window of minimum
and maximum time for overcoating primer with polyurethanes. When using primers, a small test
must be done to ensure adhesion of primer to DURABAK™. Aim for the
first third of the recommended window of opportunity for overcoating.
If wood texture is rough, it may not require special preparation. For best results, abrade surface of wood with 40-grit sandpaper before applying DURABAK™. Some pressure-treated woods may need priming. If in doubt, make a small test application first. DURABAK™ will bond to wolmanized treated wood without priming.
NOTE: Wait 4 hours after primer is touch dry before overcoating with DURABAK™.
PAINT AND VARNISH
For more information, contact COTE-L Industries.
Clean well using detergent or cleaning solvent, such as rubbing alcohol, to remove all surface release agents. Rinse well and allow to dry. Abrade surface aggressively, wipe off with Xylene, and then apply DURABAK™.
NOTE: DURABAK™ will not bond to chlorinated rubber.
Good adhesion can be obtained on unweathered gel-coated glass, rough fiber, side molded
glass, and smooth-mold resin-side glass. Surface should be free of release agents, waxes and
other production additives, then roughened well with 40-grit sandpaper to remove all gloss,
leaving a high profile surface. To ensure optimal bonding, use COTE-L's METCOTE™ primer, or an epoxy primer compatible with
both fiberglass and moisture-cured polyurethanes. Do a small test for adhesion.
Remove glaze from tile with a grinder, rinse with water, and let dry. Apply an epoxy primer compatible with ceramic tile and moisture-cured polyurethanes, and let dry thoroughly. Then apply DURABAK™ within 12 hours.
To apply Durabak to old epoxy surface, do a small test for adhesion:
a. clean surface, rinse with water, and let dry
b. roughen surface with 40-grit sandpaper
c. wipe with xylene on a rag to remove any residue left from cleaning
d. apply 1st coat of Durabak and let dry
e. apply 2nd coat of Durabak and let dry for 2 days
f. take a screwdriver and try to peel the Durabak off the surface
g. if it comes up in small pieces, you have a good bond
h. if it comes up in sheets, you need to re-prime according to manufacturer’s instructions
HOW TO APPLY
DURABAK™ for roller, brush or spray applications, is available in
one-quart and one-gallon containers. For volume applications, it is also available in
five-gallon containers by special order.
Before applying DURABAK™, it is important that the surface to be
coated is completely clean and dry. (See Surface Preparation.) Mask all areas not to be
coated. Remove masking tape as soon as possible after application of second coat, using a razor knife to cut along
the taped edge.
IMPORTANT – READ CAREFULLY!
DURABAK™ contains flammable solvents. Ensure proper ventilation
and fire precautions.
Apply DURABAK™ with special, open-foam stipple roller (only
available through COTE-L Industries, or an authorized
DURABAK™ dealer). Use only a DURABAK™
special stipple roller, which is designed to evenly distribute the embedded rubber granules on
application – other rollers will cause clumping of the rubber granules. Roller sleeves are
available in 9” and 4” sized. One 9” roller sleeve is good for approximately 1 to 1½
Apply first coat of DURABAK™ as a thin coat to fully cover. When touch dry – usually within 1½ to 3 hours – apply second coat. To avoid “mud cracking” or pooling, do not apply DURABAK™ thickly. Between coats, pour a small amount of Xylene over rollers, so rollers will not dry out. Intercoat / curing time may be significantly shortened by the use of the special accelerator (see section on accelerator). Extreme climactic conditions of heat, humidity and cold can shorten or lengthen this period.
NOTE: DURABAK™ clear must be applied in thin coats to avoid bubbling.
DURABAK™ can be applied with a soft paint brush, in two coats at
right angles to one another. (DURABAK™ is not a paint, and should be
laid onto the surface, in one direction, not brushed out as an oil or latex paint.) Between
coats, clean brush well with Xylene, only. The second coat can be applied as soon as the
first coat is touch dry (usually within 1½ to 3 hours). Extreme climactic conditions of heat,
humidity and cold can shorten or lengthen this period.
One quart covers a flat area of about 15 square feet in two coats; one gallon covers
approximately 60 square feet with two coats, with a final dry coat thickness of approximately
HOT / HUMID
HOT / DRY
COLD / DRY
1Do not use an accelerator with DURABAK 18™ in hot/humid
weather. It may increase drying time.
2Please check with COTE-L before using accelerator with DURABAK 18™.
DURABAK™ can be sprayed using a simple shutz gun, a hopper gun, or professional spray equipment. Make sure to thoroughly mix DURABAK™. A drill with a mixing adaptor works best. DURABAK™ should flow through the spraygun easily and can be thinned with Xylene.
THE CARE AND MAINTENANCE
OF DURABAK™ SURFACES
Once DURABAK™ coatings have fully cured, they are very easy to
maintain. Because DURABAK™ cures to an impermeable membrane, all
dirt sits on the surface.
CAUTION! If dirt sets in on DURABAK™ surface while it is soft and before it is cured, it could become permanently imbedded.
NOTE: DO NOT USE ANY CHLORINATED CLEANERS.
For larger areas, where the above method is not time efficient, there are alternatives available to expedite cleaning.
A wide-angle water pressure spray of 600-700 PSI can clean DURABAK™ without damage to the surface.
A rotary 14” waxing-type machine with a (thickline) blue pad can be used.
If a rinse-free detergent is used, the dirty water pickup can be done with a water vacuum.
DURABAK™ surfaces can also be cleaned with automatic scrubbers. These are machines which, in one pass, put down the washing solution, scrub the floor with a (blue) pad, and vacuum up the dirty water. The pad pressure used in the scrubber (using a blue pad) need only be sufficient for the pad to make light contact with the floor. Heavy scrubbing over time will negatively affect the DURABAK™ surface.
SPECIFIC CLEANING ISSUES
To clean a DURABAK™ surface of a greasy or slippery solution, it is necessary to use a slightly more aggressive detergent, containing a degreaser, available from chemical suppliers.
REMOVAL OF STICKY SUBSTANCES
For removal of gum or other sticky substances from a DURABAK™ surface, use a pressure washer. A wide-angle water-pressure spay of 600 to 700 PSI, at an angle of 35-40 degrees, should enable the removal of gum pieces within 10 to 15 seconds without damage to the DURABAK™ coating.
REMOVAL OF ORGANIC STAINS
Organic stains, such as leaves, can be removed using a quatinary or a slightly acidic cleaner with a neutral pH. Leave on for five or ten minutes. Rinse off according to manufacturer’s recommendations. This will only work if the stain has occurred after DURABAK™ has fully cured.
If left on the DURABAK™ surface, concentrated chlorine will discolor DURABAK™. Immediately rinse off the concentrated chlorine with water.
REPAIRING OR OVERCOATING DURABAK™
DURABAK™ can easily be repaired or over-coated (once cured), as it bonds to itself.
A liquid accelerator (available from COTE-L or an authorized DURABAK™ dealer) can be used to reduce the drying/curing time by up to 75%, depending on the climatic conditions. This may be helpful in areas of low atmospheric moisture, or when shorter curing/drying times are required. The accelerator comes in premeasured packets, one for quarts and one for gallons.
• Contents of accelerator should be added to the DURABAK™ can upon opening, at the ratio of one quart-packet per quart, or one gallon-packet per gallon.
• The mixture should be stirred thoroughly to assure complete blending, then apply as per DURABAK™ regular instructions.
• Accelerator will not affect product performance. It will only speed drying and curing time.
For added slip resistance in very wet conditions or extreme slopes, 60-grit silicon carbide can be broadcast onto the top coat of the DURABAK™ application.
• Use a simple flour covered with a stretched piece of old stocking to facilitate the application.
• The silicon carbide should be applied immediately after the top coat DURABAK™ has been laid and while it is still very wet.
• Sprinkle the silicon carbide lightly over the wet DURABAK™, as evenly as possible.
• One ounce of silicon carbide will cover approximately eight square feet of DURABAK™.
METCOTE™ is a quick-drying single-pack anti-corrosion heat-resistant etch primer polyvinyl butyral coating for non-porous surfaces. It can be used on iron, steel, aluminum, fiberglass and galvanized metal.
NOTE: METCOTE™ cannot be used for surfaces which will be submerged under water.
• Primer for DURABAK™ and DURABAK 18™
• Primer for metal and fibreglass surfaces
• Heat resistant metal coating (up to 428oF)
• A postblast primer on steel work
NOTE: Not for submerged surfaces.
• One part
• Excellent adhesion to metal
• Quick drying (30 minutes at 77oF)
• Can be topcoated with most paints after dry
• Good resistance to acid, alkali and water
• Non-flammable when cured
• Shelf life 2+ years. Once opened, can be reclosed and will remain useable for a long period afterwards. If product begins to thicken, it can be thinned with lacquer thinner, MEK, Propanol, Acetone or other similar polar solvents.
Approximately 145 sq. ft./quart
All surfaces must be clean of dirt and release agents, dry, firm and free of rust and mill scale. All surfaces should be roughened. METCOTE™ will provide a fair bond to smooth surfaces, but roughening the surface will greatly improve adhesion.
Abrade the surface with 100-360 grit sand paper. If abrasive blasting is desired, the blast profile should not exceed 50 microns (or 2 mils).
Wash with a galvanized iron cleaner until a water break free surface is obtained (i.e. no beading). Rinse with clean water.
Abrade with 220 grit sandpaper, then rinse with solvent.
NOTE: The finished surface on all substrates should have a scored, roughened profile for best adhesion.
• Stir METCOTE™ well.
• Apply thinly (less than 1.7 mils) by brush or roller.
• For conventional spray application, thin with lacquer thinners (approx 20%) to 16-20 secs (Ford Cup 4).
23oF to 122oF
NOTE: Lacquer thinners must not come into contact with DURABAK™ or DURABAK 18™. Allow METCOTE™ to dry completely before overcoating with either DURABAK™ or DURABAK 18™.
Allow a minimum of 30 minutes (at 77oF) to a maximum of two weeks. When applying any polyurethane coating such as DURABAK™, METCOTE™ must be completely dry before overcoating. If dirt or other contaminents get onto the METCOTE™ surface, clean with water and detergent or turpentine (do not use xylene) and dry thoroughly before applying DURABAK™ or DURABAK 18™. If top-coating after 14 days, lightly abrade METCOTE™ surface.
• Observe safety precautions as noted on can.
• Use lacquer thinners.
• WARNING: Do not use the same brush, roller, or spray gun for applying DURABAK™ or DURABAK 18™. Wet lacquer thinners will prevent DURABAK™ or DURABAK 18™ from bonding.
• When used for exterior use on iron, the product must be topcoated within 14 days, to prevent corrosion.
• The Dry Film Thickness must be kept at 1.2 mils or less, especially if the topcoat has strong solvents.
For additional technical assistance
contact yourDURABAK™ distributor
or COTE-L Industries, Inc.
COTE-L Industries, Inc.
1542 Jefferson Street
Teaneck, NJ 07666
|Tel: (201) 836-0733
Fax: (201) 836-5220
Cote-L Home Page
DURABAK™ Spec Sheet
Photos of DURABAK™ In Use
"Road and Bridges" Article