545 Epoxy PrimerSystem Foundation
The required first coat under every Awlgrip topcoat system — mix ratio, induction time, reducer selection, and Florida-specific application tips. Verified against the official Awlgrip 545 TDS.
Before you mix a drop of 545, watch Bob’s walkthrough. He runs Awlgrip’s YPAC (Yacht Paint Application Center) training program and is one of the best technical resources in the marine coatings world. Fiberglass Florida works closely with Bob — his guidance is the same advice we give at our Rockledge and Stuart counters every day.
545 Epoxy Primer contains isocyanates. Organic vapor + P100 respirator minimum for brush/roll. Supplied-air respirator required for spray. Read the full SDS at fiberglassflorida.com/sds before use.
What Is 545 Epoxy Primer?
Awlgrip 545 is a two-component epoxy polyamide primer with outstanding corrosion resistance and adhesion on steel, aluminum, wood, and fiberglass. It seals surfacing primers before topcoat and may be used above or below the waterline. It is the chemical barrier between the substrate and your topcoat system.
Available in White Base (D8001) and Gray Base (D1001), both mixed with Converter D3001.
545 is the approved primer under Awlgrip Topcoat, Awlgrip HS, Awlcraft SE, Awlcraft 2000, High Build Epoxy Primer, Awlquik Sanding Surfacer, and Ultra Build Primer. Starting on bare substrate? First coat is 545, full stop.
Coverage
| Coverage | Value | Notes |
|---|---|---|
| Theoretical (1 mil dry) | 497 sq ft/gal | Mixed base + converter, reduced 25% |
| At recommended DFT | 165–248 sq ft/gal | Varies by equipment & technique |
| Wet film thickness | 7–10 mils (175–250 microns) | 2–3 spray coats |
| Dry film thickness | 2–3 mils (50–75 microns) | Target per coat |
Mixing
| Component | Part | Ratio |
|---|---|---|
| 545 Base (D8001 white or D1001 gray) | Part A | 1 Part |
| Converter D3001 | Part B | 1 Part |
| Induction time after mixing | — | 15 minutes minimum |
| Pot life at 77°F / 50% RH | — | 16 hours |
After mixing, wait a minimum of 15 minutes before applying. This allows the chemical reaction to begin and reach proper viscosity. Applying too early results in under-cured primer that may not adhere.
Surface Preparation
| Substrate | Preparation Required |
|---|---|
| Aluminum | Sandblast or grind to 2–3 mil (50–75 micron) profile, clean silver. Small parts: Wash Primer CF. |
| Steel | Sandblast/grind SSPC-SP10 or Sa 2½ |
| Gelcoat / Fiberglass | Sand with 100–150 grit |
| Wood | Smooth sand with 80–100 grit |
The Awlgrip TDS specifies 100–150 grit for gelcoat and fiberglass. Coarser than 100 grit leaves scratch marks that print through the finished system. Surface must be clean, dry, and free of wax, oils, and release agents.
Reducer Selection
| Method | Reducer | Rate | Notes |
|---|---|---|---|
| Spray | T0006 (Spray Reducer) | Up to 25% | Overall mix 1:1:½ by volume |
| Brush / Roll | T0031 (Brushing Reducer) | 5–10% | Per TDS for brush/roll |
| Cold (<75°F) | COLD CURE M3066 | Per label | Maintain dry & cure times |
| Equipment cleaning | T0006, T0002, or MEK | — | — |
T0006 is the spray reducer. T0031 is the brushing reducer. Using the wrong one for your application method affects flow, dry time, and film quality. Do not substitute without confirming with the TDS or our counter.
Application Steps
Surface Prep
Sand to the correct grit for your substrate (see table above). Clean with solvent. Surface must be dry, free of wax, oil, release agents, and contamination. 545 cannot bond over a dirty surface.
Measure 1:1 Precisely
Equal parts 545 Base and Converter D3001 by volume. Use graduated containers. An incorrect ratio means the primer will not cure correctly — do not estimate.
Mix and Induct 15 Minutes
Stir thoroughly for 2 full minutes. Wait the full 15-minute induction period before applying. Use this time to set up masking and prep your tools.
Add Reducer After Induction
Spray: T0006 up to 25%. Brush/Roll: T0031 at 5–10%. Add reducer only after induction is complete. Stir again before loading your gun or roller.
Apply 2–3 Coats
Spray: 2–3 wet coats at 7–10 mils WFT. Recoat with itself: 1 hour min; with other products: 12 hours min. Brush/Roll: 2 coats at 3–4 mils WFT with 12–14 hours between coats. Light sanding between coats improves appearance.
Sand Before Topcoating
Maximum recoat without sanding: 24 hours. Sand for best adhesion and appearance. Remove all dust. Topcoat the same day you sand when possible.
Recoat & Dry Times — 77°F / 50% RH
| Stage | Spray | Brush / Roll | Notes |
|---|---|---|---|
| Recoat with itself | 1 hour min | 12–14 hours | Per Awlgrip TDS |
| Recoat with other Awlgrip products | 12 hours | 12–14 hours | High Build, topcoats, etc. |
| Maximum without sanding | 24 hours | Sand for best results | |
| Full cure | 7 days @ 77°F | Faster in FL summer | |
| Minimum temp | 55°F (13°C) | Do not cure below 55°F | |
| Maximum temp | 105°F (41°C) | Or within 5°F of dew point | |
Spray Equipment Reference
| Equipment | Specification |
|---|---|
| Airless Orifice | .028″–.043″ |
| Airless Fan / Angle | 8″ / 80° or 6″ / 60° |
| Pressure Pot Gun | Binks #95 or equivalent |
| Fluid Nozzle | #63BSS (.046″ orifice) |
| Air Nozzle | #63PW, 8–12 lbs atomizing |
| 25:1 Pump Input | 70–80 lbs |
| 40:1 Pump Input | 50–60 lbs |
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