1. GENERAL DIRECTIONS

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 paints with new cans as they are opened during applications.

PLEASE NOTE: The following information is provided as a guide only, because substrates can differ significantly. All surfaces should first be tested to ensure adhesion. Contact your Durabak Depot representative for test design.

2. DO'S AND DON'T'S

3. CONCRETE

For best results, NEW concrete should:

• Be fully cured, for at least 28 days.
• Have a brush finish.
• Be hand troweled (if already power troweled, test for adhesion of DURABAK).
• Be thoroughly cleaned with a citric cleaner or equivalent, rinsed with water, and thoroughly dried.
• Be wiped with Xylene and allowed to dry, until solvent has evaporated, immediately before applying DURABAK. (This is recommended, for best results, to ensure there is no remaining residue on the surface.)

NOTE:

• If the new concrete contains plasticizers, a small test for adhesion is essential. A primer may be needed if there is poor adhesion.
• If the concrete is oil-soaked, refer to instructions for Oil-Soaked Concrete.

OLD concrete should:

• Be completely dry before application of DURABAK™.
• Be shotblasted, if possible, and rinsed with water.

OR

• Be abraded with a scarifying machine (leaving a roughened surface) and brushed off.

OR

• Be thoroughly cleaned with muriatic acid wash.

1. Use 45% to 50% muriatic acid solution mixed with 3 to 4 parts water.
2. Agitate solution on surface with a hard-bristled deck brush for approximately 10 minutes, to open pores on surface.
3. Rinse off with a 5% ammonia/water solution to neutralize acid. (Failing to neutralize acid could leave residue, which might cause delamination.)

• Be dried completely. If necessary, use a heat source.
• Be brushed off to remove all residue.
• Be wiped well with Xylene immediately before applying DURABAK paint. Let the Xylene evaporate before applying DURABAK.

NOTE:

• If the old concrete contains plasticizers, a small test for adhesion is essential. A primer may be needed if there is poor adhesion.

4. OIL-SOAKED CONCRETE

1. Open pores of concrete with muriatic acid and rinse, as above.
2. Apply an oil emulsifier and agitate with deck brush for 10 minutes.
3. Rinse with hot water.
4. Rinse twice with cold water.
5. Dry completely.
6. Wipe with Xylene immediately, and then let the solvent evaporate before applying DURABAK™.

NOTE: For chemically-soaked concrete, or other unusually difficult surfaces, contact your Durabak Depot representative before application.

5. SEALED CONCRETE

Sealed concrete should first be tested for DURABAK adhesion:

1. Clean surface thoroughly.
2. Roughen surface.
3. Brush surface off thoroughly.
4. Rinse with water and dry thoroughly.
5. A Xylene wipe is recommended. Let solvent evaporate.
6. Apply DURABAK™.
7. If delamination occurs, sealer must be removed by mechanical means (i.e., shot blasting or scarifying).

While it is not usually needed on concrete, a primer can provide enhanced adhesion. Contact your Durabak Depot representative before application for specific information on surfaces to be primed.

6. CONCRETE PLUS PRIMER

DURABAK exhibits good adhesion to new acrylic and polyurethane primers applied and overcoated to manufacturer’s 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.

7. ASPHALT

1. Prime surface with a mineral spirit or water-based driveway sealer according to manufacturer's specifications. Be sure the sealer is compatible with both asphalt and one-part moisture-cured polyurethanes.
2. Apply DURABAK when primer is thoroughly dry.
3. For oily asphalt, contact your Durabak Depot representative before application for proper cross-link primer.

8. ALUMINUM

1. Abrade to obtain rough surface. May or may not require additional primer. Recommend test for adhesion.
2. If a primer is needed, use an etch primer for aluminum that is compatible with moisture-cured polyurethanes. Apply during the first third of the recommended overcoat window, after the primer is touch dry.

9. Metal

All smooth metal should be thoroughly cleaned, aggressively roughened, and primed with an etch primer that 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. Durabak Depot 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.

10. WOOD

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 paint will bond to Wolmanized treated wood without priming.

NOTE: Wait 4 hours after primer is touch dry before overcoating with DURABAK™.

11. PAINT AND VARNISH

1. Remove all peeling, cracking, or chipping paint.
2. Clean surface thoroughly.
3. For best results, lightly abrade surface with an 80-grit sandpaper.
4. Clean the surface with a good cleaner, such as tri-sodium phosphate (TSP). Test in small area to make sure cleaner isn't softening the painted surface.
5. It is strongly recommended to wipe surface with Xylene before applying DURABAK.

In the case of epoxy coatings which become very hard with age, clean, then abrade surface with 40-grit sandpaper. Rinse, dry, and test for adhesion. If poor adhesion occurs, soak with Xylene for 10 minutes, wipe off, roughen, and wipe once more with Xylene.

12. RUBBER

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.