Expanded Vermiculite Supplier China | Grade 1–5 Asbestos-Free
Expanded (exfoliated) vermiculite in all particle sizes, supplied from verified Chinese processing sources. Asbestos-free certified. FOB / CIF from major Chinese ports.
Supplied to horticulture distributors, construction material manufacturers, industrial insulation contractors, and refractory producers across the Middle East, Southeast Asia, Europe, Africa, and the Americas. Every shipment includes COA and asbestos-free certification as standard.
Select Your Grade
Vermiculite is graded by expanded particle size. Finer grades are preferred for horticulture and insulation plaster; coarser grades for loose-fill insulation, construction aggregates, and packaging. All grades available in both golden and silver color variants.
Horticultural & Plaster
Finest grade for seed starting, propagation mixes, and spray or trowel-applied insulating plaster.
- Seed germination media
- Insulating plaster / render
- Friction lining filler
Horticulture Standard
The most widely used horticultural grade worldwide — balanced moisture retention, aeration, and nutrient exchange for potting mixes and transplanting.
- Potting & propagation mixes
- Hydroponics substrate
- Lightweight concrete filler
Construction & Horticulture
Versatile mid-range grade for loose-fill roof insulation, lightweight concrete screeds, and coarser horticultural blends.
- Loose-fill roof/floor insulation
- Lightweight screed aggregate
- Soil amendment for shrubs
Industrial & Insulation
Largest expanded grade for high-temperature loose-fill insulation, void filling, hazmat packaging, and refractory applications.
- High-temp loose-fill insulation
- Hazardous goods packaging
- Refractory & furnace lining
Lightweight — Bulk Density 60–160 kg/m³
Expanded vermiculite is one of the lightest mineral products available — dramatically reducing structural loads in construction and shipping costs compared to conventional aggregates.
Excellent Water & Nutrient Retention
Accordion-layered structure absorbs and holds water and dissolved nutrients, releasing them gradually to plant roots. Critical for potting mixes, hydroponics, and propagation media.
Non-Combustible up to 1,150 °C
Vermiculite is inherently fireproof with a melting point above 1,300 °C. Widely specified in fire-rated building systems, passive fire protection, and high-temperature industrial insulation.
Asbestos-Free Certified
All Miningsun vermiculite is sourced from deposits independently tested and certified free from asbestiform minerals. Test certificates available on request for every lot.
pH Neutral, Sterile & Non-Toxic
Natural pH 6.5–7.5, sterile (no weed seeds or pathogens), chemically inert, and non-toxic. Fully compatible with organic farming standards and food-contact applications.
Flexible Packaging for Retail or Bulk
Available in 10 L / 100 L retail bags, 25 kg PP bags, 1 MT / 1.5 MT jumbo bags, or loose in containers. Custom bag printing and private-label packaging available.
Typical Physical & Chemical Properties
Properties of expanded (exfoliated) vermiculite. Values may vary slightly by grade and origin (golden vs. silver). Batch-specific COA available on every shipment.
| Property | Grade 1–2 (Fine) | Grade 3 (Medium) | Grade 4–5 (Coarse) |
|---|---|---|---|
| Particle Size (mm) | 0 – 3 mm | 3 – 6 mm | 6 – 12 mm |
| Bulk Density (kg/m³) | 120 – 160 | 90 – 130 | 60 – 100 |
| pH (10% aqueous suspension) | 6.5 – 7.5 (neutral) | ||
| Water Absorption (% by weight) | 250 – 350% | ||
| Thermal Conductivity (W/m·K, 20 °C) | 0.060 – 0.065 | ||
| Maximum Service Temperature | 1,150 °C (non-combustible) | ||
| SiO₂ Content (typical) | 38 – 46% | ||
| MgO Content (typical) | 16 – 25% | ||
| Al₂O₃ Content (typical) | 10 – 14% | ||
| Asbestos Content | None detected (certified) | ||
| Moisture Content (max) | ≤ 2% | ||
* Typical values from production. Asbestos-free certification and batch COA issued with every shipment.
Where Our Customers Use Vermiculite
From greenhouse substrate in the Netherlands to passive fire protection in Gulf construction — vermiculite's combination of lightness, heat resistance, and absorbency makes it unique among industrial minerals.
Horticulture & Agriculture
Potting mixes, seed starting, transplanting media, hydroponics, and soil amendment for improved moisture and nutrient retention.
Construction Insulation
Loose-fill insulation for walls, attics, and floors. Lightweight concrete screeds and insulating plasters for thermal and acoustic performance.
Passive Fire Protection
Fire-rated board, plaster, and loose-fill cavity fill for structural steel protection and fire-rated wall and partition systems.
Refractory & High-Temp Insulation
Furnace, kiln, and boiler insulation. Loose-fill and cast refractory mixes for industrial equipment operating above 800 °C.
Hazardous Goods Packaging
Loose-fill void packing for shipping chemicals, batteries, reactive materials, and fragile goods. Non-combustible and absorbent.
Animal Feed & Aquaculture
Carrier and anti-caking agent in pelleted animal feed. Also used as incubation substrate in reptile and aquaculture breeding.
Packaging, Ports & Payment
Flexible packaging from retail bags to bulk container loads. Note: vermiculite is sold by volume (litres / m³) as well as by weight.
Packaging Options
- 10 L / 20 L / 100 L retail PP bags (for resellers)
- 25 kg PP woven bags, palletized & shrink-wrapped
- 1,000 kg / 1,500 kg jumbo bags (FIBC) with PE liner
- Loose bulk in 20' / 40' containers
- Custom private-label & retail branding available
Loading Ports
- Tianjin / Xingang Port (primary)
- Qingdao Port
- Shanghai Port
- Lianyungang Port
- Container shipments arranged to all major ports
Payment Terms
- 30% T/T deposit, 70% balance against B/L copy
- L/C at sight (irrevocable, from prime banks)
- D/P, D/A negotiable for established buyers
- Trial orders accepted to build long-term relationships
Documentation Provided
- Commercial Invoice & Packing List
- Bill of Lading (B/L)
- Certificate of Origin (CO / Form A / FORM E)
- COA & Asbestos-Free Certificate per shipment
- SGS / BV / CIQ third-party inspection on request
Consistent Expansion, Verified Source.
China is the world's second-largest producer of vermiculite, with major deposits in Xinjiang (silver) and Inner Mongolia / Hebei (golden). Miningsun sources from established processing facilities with controlled exfoliation — ensuring consistent bulk density, particle size distribution, and color batch to batch.
- Asbestos-free certified — every lot independently tested, certificates provided as standard
- Consistent expansion ratio — controlled exfoliation temperature for uniform bulk density within ±10 kg/m³
- All grades stocked — Grade 1 through Grade 5 available year-round from warehouse stock
- Retail & wholesale packaging — from 10 L consumer bags to bulk container loads; private-label printing available
- Stable pricing — quarterly fixed-price contracts for distributors and volume importers
- Reliable lead times — 15–25 days from PO to vessel loading
- Full export documentation — CO, asbestos cert, COA, MSDS, fumigation as required
- Responsive sales team — quotes within 24 hours, English / Chinese supported
Frequently Asked Questions
What is the difference between golden and silver vermiculite?
How do I choose the right grade for my application?
Is your vermiculite certified asbestos-free?
Can vermiculite be used as a standalone growing medium?
What is the minimum order quantity (MOQ) for vermiculite?
Technical & Compliance Documents
Available to qualified buyers upon request — please specify grade, packaging format, and estimated annual volume when reaching out.
Request a Quote for Vermiculite
Tell us your required grade, packaging format, annual volume, and destination port — we'll respond with a competitive FOB/CIF price within 24 hours.
Get a Price Or email us directly: info@miningsun.com · WhatsApp: +1 814 515 0096