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Coarse / Bulk-Fill Grade

C-28Coarse Bulk-Fill Glass Flake for Heavy-Duty Lining Systems

C-28 is our coarsest milled C-glass flake — engineered for thick-film barrier coatings and heavy-duty tank linings in aggressive immersion service. The large platelet geometry delivers maximum barrier overlap per kilogram of filler.

C-28 coarse glass flakes — milled C-glass platelets 300–1700 μm diameter for heavy-duty tank lining coatings
C-28 glass flakes — macro view of precision-milled platelets (C-Glass substrate).

Key Specifications

Median Diameter (D50)
600 μm
Nominal Thickness
5 ± 2 μm
Bulk Density
0.2 g/cm³
Max Aspect Ratio
560 : 1
Product Overview

About C-28

C-28 consists of milled C-glass platelets with a nominal diameter of 300–1700 μm and a uniform 5 ± 2 μm thickness, yielding an aspect ratio of up to 560:1. The coarse size enables high loading in thick-film epoxy and vinyl-ester linings (typically 800 μm to 2 mm DFT) where a dense, overlapping lamellar barrier is required to resist hydrostatic pressure, immersion, and aggressive chemical attack. C-28 is recommended for trowel- and roller-applied systems. Available in three surface-treatment variants to suit epoxy, vinyl-ester, or untreated polymer matrices.

Surface Treatment Options

Available Variants

C-28N
Untreated — general-purpose coarse flake for inert polymer matrices.
C-28V
Silane-treated for vinyl-ester resins — chemical-process tank linings.
C-28E
Silane-treated for epoxy resins — marine and immersion service coatings.
Particle Size Distribution

PSD Profile

1700–300 μm80%
<45 μm20%
Technical Data

Full Specifications

Median Diameter (D50)600 μm
Nominal Thickness5 ± 2 μm
Bulk Density0.2 g/cm³
Max Aspect Ratio560 : 1
Glass TypeC-Glass (calcium-aluminosilicate)
Surface TreatmentsN (none) · V (vinyl-ester) · E (epoxy)
Recommended Loading15–30 wt%
Moisture Content< 0.2%
Packaging20 / 25 kg moisture-proof paper bag
MOQ1,000 kg
Lead Time2–4 weeks from order confirmation
Trade TermsFOB Tianjin · CNF · CIF
Visual Reference

Product Gallery

C-28 detail view — irregular platelet morphology and smooth fractured surfaces of milled C-glass flakes
C-28 detail view — irregular platelet morphology and smooth fractured surfaces of milled C-glass flakes
C-28 bulk sample — coarse glass flake showing characteristic light-grey colour and flat lamellar form
C-28 bulk sample — coarse glass flake showing characteristic light-grey colour and flat lamellar form
Recommended Use

Typical Applications

Immersion tank linings — chemical, oil & gas, and water treatment
Ship ballast tank and hull bottom heavy-duty coatings
Concrete secondary containment and bund linings
Trowel-applied flooring systems for aggressive-chemical areas
Thick-film epoxy & vinyl-ester barrier coatings (800 μm – 2 mm DFT)
FRP reinforcement for chemical-process equipment
Formulation Compatibility

Recommended Coating Systems

  • Vinyl-ester tank linings (use C-28V)
  • Epoxy heavy-duty immersion coatings (use C-28E)
  • Polyester FRP lay-up compounds (C-28N)
  • Glass-flake modified mortars and grouts
Compare Grades

Related Products

C-90
Mid-Range / Spray Grade
View details →
C-150
Smooth / Medium Grade
View details →
C-400
Ultra-Fine / Pigment Grade
View details →
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Free sample kits shipped worldwide — you only cover freight, which may be discounted on your first order. Typical MOQ 1,000 kg; lead time 2–4 weeks.

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