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Block Rubber — TSR / STR

Thai block rubber in STR 5L, STR 10 and STR 20 grades for tire, automotive and technical rubber goods manufacturing worldwide.

TSR STR20 block rubber bales packed for export
Origin: Thailand

Product Description

Block rubber (Technically Specified Rubber) is produced from field coagulum and cup lump, cleaned, blended, crumb-dried and pressed into standard bales. STR20 is the workhorse grade for tires and industrial rubber products; STR5L is a light-colored grade for applications where appearance matters.

  • Grades: STR 5L · STR 10 · STR 20 (other grades on request)
  • Packaging: bales 33.33 kg (35 kg on request), PE-wrapped, strapped in approx. 1.11 MT bundles
  • Loading: approx. 20–21 MT per 20ft FCL (subject to shipping line weight limit)
  • MOQ: 1 × 20ft container (trial quantities negotiable)
  • Incoterms: EXW / FOB / CFR / CIF

Typical Specification — STR 20

Dirt content0.16% max
Ash content1.00% max
Volatile matter0.80% max
Nitrogen content0.60% max
Mooney viscosity ML(1+4) 100°C60 ± 10 (typical)
Initial plasticity (Po)30 min (typical)

Values shown are typical trade specifications. Final guaranteed values per grade are stated in our offer sheet and confirmed by the Certificate of Analysis (COA) of each shipment. STR 5L: light color, dirt 0.05% max.

Applications

  • Tire and retreading industry
  • Automotive rubber parts and bushings
  • Conveyor belts, hoses and molded goods
  • Footwear soles and technical compounds

Documents Provided

  • Commercial Invoice & Packing List
  • Bill of Lading (B/L)
  • Certificate of Origin (COO)
  • Certificate of Analysis (COA)

Get STR block rubber pricing today

Grade, quantity and destination port — that's all we need to quote.