BASTAIN
Carbon Fiber

Carbon Fiber Composite Coatings

Enter sub-pages by application scenario for component-specific BACOAT systems.

Why In-Mold Gelcoat · Absolute Advantage

Why In-Mold Gelcoat Is the Absolute Edge for Carbon A-Surface

Gelcoat cures in-mold with the carbon preform at molecular bonding; the demolded part is ready — no post-paint line.

In-Mold Adhesion
≥12 MPa
Post-paint only 3–5 MPa
A-Surface Roughness
Ra 0.05 μm
Mirror-mold direct transfer
Pinhole Rate
<1 %
Post-paint typically 5–15%
Post-Paint Steps
0–1 step
Demold-ready; one topcoat only when color is needed
Cycle Time Saved
25–40 min
Skip sanding / primer / multi-coat line
Batch Consistency
100 %
Mold-set finish, unaffected by painter
In-Mold vs Post-Paint · Three Axes
Adhesion Strength higher is better
In-mold
12 MPa
Post-paint
4 MPa
Pinhole Rate lower is better
In-mold
<1%
Post-paint
10%
Per-Part Post-Paint Labor lower is better
In-mold
0–15 min
Post-paint
40+ min
Standard Process · 5 Steps

5-Step Process Flow

01
Mold Prep
Release agent uniform, tape-pull test
02
Gelcoat Prep
Stir, rest 15min, 100-mesh filter
03
Spray
DFT 40-50μm, cross-hatch method
04
Cure
60°C±2°C, 60-90min to touch-dry
05
Lay-up
Within 15-30min, mold 40-50°C
Common Issues · Troubleshooting

Defect Troubleshooting

Defect Cause Solution
Surface pinholesTrapped air / high humidity / short levelingRest 5min after stir, humidity ≤65%, extend leveling 5-10min after spray
Poor adhesionDirty mold / excess release agent / low cure tempWipe with special cleaner on non-woven cloth, cure at 60°C±2°C ≥30min
Cracking from over-thick filmDFT >50μm shrinkage stressWet film comb monitor, wet film ≤100μm, adjust gun speed and pressure
Third-Party Certified · GOTS

Independent Lab Certification

DB4800 in-mold gelcoat + AC5800 topcoat system, carbon exterior trim — passed full automotive-grade environmental testing.

PASS
2000h
Xenon Arc Aging
Gray scale 4, no cracking or chalking
PASS
336h
Humidity 95%RH
50°C, adhesion grade 0, no blistering
PASS
500h
Heat Aging 90°C
Gray scale 4-5, no deformation
PASS
10cycles
Thermal Cycling -30~85°C
Hot/cold/humid cycles, adhesion grade 0
PASS
-30°C
Cold Impact 1000g
150mm drop ball, no cracking
In-Mold Gel-Coat · Two Series

Two Gelcoat Series Compared

BACOAT-GEL-L
Liquid Gelcoat · Autoclave
Gelcoat Thickness
40 – 50 μm
Hold Time
4 ± 0.5 h
Adhesion
≥ 12 MPa
Long-term Heat
≤ 120°C
BACOAT-GEL-P
Powder Gelcoat · Press Mold
Gelcoat Thickness
30 – 40 μm
Hold Time
15 - 20 min
Adhesion
≥ 10 MPa
Long-term Heat
≤ 100°C
General Process DFT 40-50μm · Spray pressure 0.3-0.5 MPa · Gun speed 30-50 cm/s · Bake 60±2°C to touch-dry
Lay-up Window Within 15-30 min after oven, mold 40-50°C · Humidity ≤65% · Two gelcoat types cannot be mixed

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