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Isopon BPO Hardener
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Isopon BPO Hardener

£2.27

SKU: US-9028841013528 Category:
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Isopon BPO Hardener

The Isopon BPO Hardener (20g) is a high-quality benzoyl peroxide-based hardener designed for use with all U-POL and Isopon polyester fillers. Formulated for consistent performance, this catalyst initiates the curing process when mixed with compatible body fillers, providing strong and durable repairs.

Whether you’re a professional in automotive body repair or a DIY enthusiast, this hardener ensures a reliable cure time and excellent adhesion. It comes in user-friendly sachet packaging and is also compatible with U-POL dispenser tubes, offering flexibility and ease of use in any repair setup.


Key Features

  • Universal Compatibility: Suitable for use with all U-POL and Isopon polyester-based body fillers
  • Effective Curing Agent: Accelerates and ensures complete curing of filler for long-lasting repairs
  • Easy to Use: Convenient 20g size in sachet and tube format for quick dispensing and mixing
  • Fast-Acting: Consistently reliable setting time when used under standard temperature conditions
  • Professional Quality: Designed for both workshop and home use
  • Precise Mixing Ratio: Use as directed to achieve optimal hardness and adhesion without over-catalyzing

Product Dimensions & Weight

Specification Measurement
Volume 20g
Boxed Weight 15g

Note: Product weight may vary slightly depending on packaging configuration.


Technical Specifications

  • Product Type: Benzoyl Peroxide Hardener
  • Usage: For catalyzing polyester body fillers
  • Mixing Ratio: Refer to filler product instructions (typically ~2% by weight)
  • Packaging: Sachet and tube compatible with U-POL dispensers
  • Commodity Code: 2916320000
  • Country of Origin: Italy
  • Shelf Life: Refer to packaging for expiry date (store in a cool, dry place)

Warranty Information

  • Warranty: Covered by manufacturer warranty for product defects
  • Conditions: Must be stored correctly and used before expiration
  • Exclusions: Improper use or mixing with incompatible materials
  • Support: Contact U-POL or Isopon directly for technical queries and claims

Frequently Asked Questions (FAQs)

Q1: Can this hardener be used with non-U-POL fillers?
A1: It is specifically designed for U-POL and Isopon fillers. Using it with other products may result in inconsistent curing or performance.

Q2: What is the recommended mixing ratio?
A2: Most polyester fillers require approximately 2% hardener by weight. Always follow the instructions on the specific filler product.

Q3: How long does the mixed filler remain usable?
A3: Pot life is typically 4–6 minutes at 20°C, depending on the filler and working conditions. Mix only what can be used immediately.

Q4: Does temperature affect curing time?
A4: Yes, warmer temperatures speed up the reaction, while colder environments slow it down. Adjust working time accordingly.

Q5: Is this hardener safe for indoor use?
A5: Use in a well-ventilated area and follow safety precautions, including wearing gloves and eye protection. Refer to the safety datasheet for handling guidelines.


The Isopon BPO Hardener – 20g is a compact, professional-grade catalyst that ensures strong and efficient curing of all U-POL and Isopon polyester fillers. Its reliable performance and convenient packaging make it a must-have accessory for any filler-based repair job.

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