Pyrophyllite Soft Platy Filler REACH Compliant

Supersilk® Pyrophyllite
Filler UK

Pyrophyllite (aluminium silicate). Soft platy structure, Mohs 2.0. d50 11.2μm. SiO₂ 53%, Al₂O₃ 35%. Reflectance 84%. Good dry brightness and chemical stability for paints, coatings, sealants, mastics and grouts.

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Product Overview

Supersilk® — Pyrophyllite Soft Filler

Supersilk® is a micronised pyrophyllite — an aluminium silicate mineral characterised by its softness and platy (lamellar) structure, with good dry brightness and chemical stability.

Its platy morphology and low Mohs hardness (2.0) make it a practical inert reinforcing filler in paints, coatings, sealants, mastics and grouts, where low equipment wear matters. Processed at our Johannesburg facility.

◆Pyrophyllite — a platy aluminium silicate mineral
◆Soft platy structure, Mohs 2.0 — gentle on equipment, smooth texture in finished products
◆d50 11.2μm — medium particle size for good dispersion and uniform filler distribution
◆SiO₂ 53%, Al₂O₃ 35%, Fe₂O₃ <0.1% (mean values)
◆Reflectance 84% — good brightness contribution in white and near-white formulations
◆Chemical stability
◆SG 2.70

Key Specifications

Mineral TypePyrophyllite

ClassAluminium silicate

SiO₂53%

Al₂O₃35%

d5011.2μm

Specific Gravity2.70 kg/litre

HardnessMohs 2.0

Reflectance84%

Fe₂O₃<0.1%

Melting Point>1250°C

Oil Absorption35%

Bulk Density0.43 kg/litre

LOI<7.0%

GradeSS (Standard)

OriginJohannesburg, SA

REACHCompliant

Packaging25kg packed bags only

Typical values. Contact us for specification confirmation.

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Product Photography

Actual Product Sample

Supersilk® micronised pyrophyllite from our South African production partner's Johannesburg processing facility. Soft platy structure, fine white powder.