Perlite: A Versatile Raw Material for Industrial and Agricultural Applications


Perlite is a naturally occurring volcanic glass that expands when heated, creating a lightweight, porous material. Its unique properties make it indispensable in industries like construction, agriculture, and water filtration. This article explores its functions, types, and how to source it effectively.


How to Find Reliable Perlite from China in 2025


China is a leading supplier of Perlite, offering competitive pricing and large-scale production capabilities. To find trustworthy suppliers:

  • Check certifications like ISO 9001 for quality assurance.
  • Review customer feedback on platforms like Alibaba.
  • Request samples to test expansion ratio and purity.

Top manufacturers often provide customized packaging and bulk discounts.


What Buyers Should Know Before Buying Perlite from China


Before purchasing, consider:

  • Moisture content (should be below 1%).
  • Expansion ratio (typically 4:1 to 20:1).
  • Shipping costs, as Perlite is lightweight but bulky.

Negotiate Incoterms (e.g., FOB, CIF) to clarify responsibilities.


Types of Perlite


Perlite is categorized by particle size and application:

  • Crude Perlite: Unexpanded ore, used for further processing.
  • Expanded Perlite: Lightweight, used in insulation and horticulture.
  • Micronized Perlite: Fine powder for fillers and coatings.

Functions and Features of Perlite


Key advantages include:

  • Excellent thermal and acoustic insulation.
  • High water retention for soil conditioning.
  • Chemical inertness and fire resistance.

Its porosity (90%+) enhances filtration efficiency.


Scenarios of Perlite


Perlite is used in:

  • Construction: Lightweight concrete and plaster.
  • Agriculture: Soil amendment for better aeration.
  • Industry: Filter aid in food and pharmaceuticals.

How to Choose Perlite


Select based on:

  • Application: Coarse grades for insulation, fine for horticulture.
  • Purity: Low iron content for high-temperature uses.
  • Supplier reputation: Opt for manufacturers with 5+ years of experience.

Perlite Q & A


Q: Is Perlite eco-friendly?
A: Yes, it’s non-toxic and recyclable.

Q: How does Perlite compare to vermiculite?
A: Perlite offers better drainage, while vermiculite retains more water.

Q: Can Perlite be reused?
A: In horticulture, yes—sterilize before reuse.

Q: What’s the shelf life of Perlite?
A: Indefinite if stored dry.

Q: Why is Chinese Perlite cost-effective?
A: Large-scale mining and processing reduce costs.