Awlgrip Topcoat — Brush, Roll & Spray
The complete application reference for the Awlgrip Topcoat (G/H product line): mix ratios, reducer selection by temperature, induction time, pot life, and recoat windows for both brush-and-roll and spray methods.
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About Awlgrip Topcoat
Awlgrip Topcoat is a premium two-component polyurethane high-gloss finish formulated to deliver excellent appearance combined with chemical resistance and hardness. It is one of the few Awlgrip topcoats that can be applied by spray, brush, or roller — most of the other finishes in the family (Awlcraft 2000, Awlcraft 3000, Awlcraft SE, Awlgrip HDT) are spray-only.
Awlgrip Topcoat carries an 18-month standard warranty term for new builds, expected gloss of 92+ gloss units, and full cure (enter service) at 14 days under standard conditions of 25 °C / 77 °F at 50% relative humidity.
One product, two converters
The choice between spray and brush/roll is made at the converter, not the base. Use Awlcat #2 (G3010) for spray application and Awlcat #3 (H3002) for brush and roll. Mixing the wrong converter into the wrong process is a common cause of failure.
Components You Need
| Component | Code | Used For |
|---|---|---|
| Awlgrip Topcoat Base | G / H Series (color) | The pigmented base — every color in the Awlgrip color card |
| Awlcat #2 Spray Converter | G3010 | Spray application only |
| Awlcat #3 Brushing Converter | H3002 | Brush and roll application only |
| Spray Reducer (Fast) | T0001 | Spray, 60–75 °F |
| Spray Reducer (Fast/Cool) | T0002 | Spray, 50–70 °F |
| Spray Reducer (Standard) | T0003 | Spray, 70–90 °F |
| Spray Reducer (Hot) | T0005 | Spray, 90–105 °F (often blended with T0001/T0002/T0003) |
| Brush/Roll Reducer | T0031 | Brush and roll only — slow evaporation, maximizes flow |
Mix Ratios — Spray vs. Brush/Roll
Spray
1 : 1 Base : Awlcat #2 (G3010)
Mix by volume one part Awlgrip Topcoat Base with one part Awlcat #2 (G3010) Spray Converter to a smooth, homogenous mixture.
Reducer addition is then added to reach a viscosity of 11–14 seconds DIN 4 (or 16–18 seconds Zahn #2). The exact percentage varies with temperature, humidity, equipment, and color, but typically lands between 15% and 33% by volume of the mixed base + converter.
Induction time: none required.
Pot life @ 77 °F: ~7 hours.
Brush & Roll (Roll-and-Tip)
2 : 1 Base : Awlcat #3 (H3002)
Mix by volume two parts Awlgrip Topcoat Base with one part Awlcat #3 (H3002) Brushing Converter until smooth and homogenous.
Reduce 10–33% with T0031 Brush Reducer. The overall mix becomes 2 : 1 : ⅓–1 by volume — for example, 8 oz Base, 4 oz H3002, and 1.3–4 oz T0031.
Induction time: none required.
Pot life @ 77 °F: ~7 hours.
Never substitute
Do not use T0031 to reduce a spray mix, and do not use T0001/T0002/T0003/T0005 to reduce a brush/roll mix. Each reducer is matched to the converter chemistry and evaporation rate of its application method. Substituting will affect flow, gloss, sag resistance, and final finish quality.
Reducer Selection by Temperature
The reducer keeps the paint film open long enough to flow before flashing off. Using the wrong reducer for your shop temperature is the most common cause of orange peel, solvent pop, or poor flow.
| Reducer | Method | Temperature Range | Notes |
|---|---|---|---|
| T0001 — Fast Spray | Spray | 60–75 °F (16–24 °C) | Standard fast reducer for cooler shops; can be blended with T0005 above 90 °F to combat solvent pop. |
| T0002 — Fast/Cool Spray | Spray | 50–70 °F (13–21 °C) | Excellent gun and equipment cleaner. Used as the reducer for topcoats flattened with G3013 Flattening Agent. |
| T0003 — Standard Spray | Spray | 70–90 °F (21–32 °C) | The workhorse reducer for most Florida shop conditions. |
| T0005 — Hot Weather Spray | Spray | 90–105 °F (32–41 °C) | Most often used as an additive with T0001/T0002/T0003 to improve flow rather than as the sole reducer. Very slow evaporation can extend dry and tape times. |
| T0031 — Brush Reducer | Brush & Roll | 60–90 °F (best 70–85 °F) | Slow evaporation maximizes flow and leveling, minimizes brush marks and roller stipple. Not for spray. |
Spray Application Process
- Verify substrate. Awlgrip Topcoat goes over properly cured 545 Epoxy Primer (or another approved Awlgrip primer system). Sand the primer to remove all gloss, vacuum, blow off, and wipe down using the two-cloth method with Awlprep 400 (T0170) or Awlgrip Surface Cleaner (T0340 in EU).
- Confirm conditions. Substrate must be at least 5 °F / 3 °C above the dew point. Ambient temperature 55–105 °F (13–41 °C). Avoid late-day application where overnight condensation could contact the wet film.
- Mix base and converter 1:1 by volume with Awlcat #2 (G3010). Stir to a smooth, homogenous mixture.
- Add reducer chosen for your temperature, working up to 33% by volume to reach 11–14 seconds DIN 4 viscosity. Verify with a viscosity cup if in doubt.
- Tack the surface with Awlgrip Deluxe Tack Rags (#73009) using a light dusting motion — let the resin do the work.
- Set up the gun. See the Spray Equipment page for the recommended tip and pressure for your gun. For Awlgrip Topcoat, target a 0.85–1.2 mm fluid tip on most pressure or gravity guns.
- Apply 3+ coats. Spray a light tack coat first, then 2–3 cross-coats to build to the recommended 1 mil DFT per coat (acceptable range 2–3 mils total DFT). Wait at least 30 minutes between coats; do not exceed 24 hours without sanding.
Brush & Roll (Roll-and-Tip) Process
- Substrate prep is identical to spray. Sand the cured primer, vacuum, blow off, and complete the two-cloth wipe-down. Tack with Awlgrip Deluxe Tack Rags immediately before applying.
- Mix 2:1 base to Awlcat #3 (H3002). Add T0031 to bring the overall mix to 2 : 1 : ⅓–1 — start at the lower end (around 10% reducer) on cool days and work up toward 33% on hot days.
- Use the right tools. A 3/16" mohair roller cover lays the smoothest film; foam covers add bubbles and are not recommended. For tipping, use a quality natural-bristle brush rated for solvent-borne urethanes. Household brushes will dissolve.
- Work in small panels. Roll a section about 18–24" wide and immediately tip off in long, light strokes from the wet edge into the dry zone. Always tip in one direction.
- Maintain a wet edge. Two painters work best — one rolling, one tipping. Plan the panel sequence in advance to avoid stopping in the middle of a hull side.
- Wet film thickness per coat is 4–5 mils (100–125 microns), yielding ~1.4 mils dry. Plan on a minimum of three coats for full hide and gloss.
- Recoat at minimum 30 minutes at 77 °F; do not exceed 24 hours without sanding.
Why roll-and-tip works
The slow evaporation of T0031 keeps the film open long enough for the brush marks and roller stipple to flow out before the surface skins over. Reducing too little, working too fast, or working in temperatures above 90 °F will all shorten that open time and leave brush or roller texture in the cured film.
Cure, Recoat & Tape Times
Awlgrip Topcoat goes through three cure cycles. All times are based on standard conditions of 25 °C / 77 °F at 50% RH. In cooler conditions, recoat times double for every 3 °C / 5 °F drop below standard. Below 12 °C / 55 °F the curing process stops entirely.
| Stage | Time @ 77 °F | What's Happening |
|---|---|---|
| Touch dry | ~3 hours | Surface is dust-free; do not touch. |
| Min recoat with topcoat | 30 minutes | Subsequent topcoat may be applied wet-on-wet up to this point. |
| Max recoat without sanding | 24 hours | Past 24 hours, sand the existing coat with P400 before recoating. |
| Hard dry | 22 hours | End of First Cure Cycle. Boot lines and stripes can be taped — remove tape within 24 hours. |
| Tape time | 24 hours | Earliest safe time to apply low-tack masking for stripes. |
| Second cure cycle | 72–96 hours (3–4 days) | Film hardens significantly; abrasion and chemical resistance develop. |
| Full cure / enter service | 14 days | End of Third Cure Cycle. Coating has developed all of its physical properties. |
Moisture is the enemy
Moisture in contact with Awlgrip topcoat before it completes the first cure stage can cause loss of gloss, flat spots, grainy surface, blistering, or water-spotting. Avoid applying topcoats when the temperature could drop below the dew point within 6–8 hours of application.
Do's and Don'ts
Do
- Use the matched converter — Awlcat #2 (G3010) for spray, Awlcat #3 (H3002) for brush/roll.
- Verify ambient and substrate temperature, humidity, and dew point before mixing.
- Strain the mixed paint through a fine paint strainer before loading the gun or roller tray.
- Spray a test panel before each session to verify color, hide, and atomization.
- Wash with Awlwash 2.0 / Awlwash for ongoing maintenance after the 14-day full cure.
Don't
- Don't apply over uncured primer — the primer must reach minimum overcoat time per its TDS.
- Don't paint in direct sunlight; the heat will skin the film before it can flow.
- Don't exceed 24 hours between coats without sanding.
- Don't use household brushes or foam rollers — both will fail in solvent-borne urethane.
- Don't add accelerators (X-98, X-138) to brush mixes unless explicitly indicated by the TDS.
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