BOLL Hardener for Body Filler

is a high-quality hardener designed for use with 2K polyester body fillers, spray putties and polyester resins.

It ensures fast, reliable curing and helps achieve optimum mechanical strength, excellent adhesion and a durable repair when mixed in the recommended proportions.

It is suitable for automotive refinishing, body repairs, industrial maintenance and composite applications.

Key Features

• Suitable for polyester body fillers, spray putties and polyester resins
• Ensures fast and uniform curing
• Delivers excellent mechanical strength after full cure
• Provides consistent and reliable hardening when used at the recommended mixing ratio
• Easy to mix for a smooth, homogeneous consistency
• Ideal for automotive body repairs, fibreglass repairs and general composite work
• Compatible with most 2K polyester repair products

Typical Applications

• Polyester body fillers
• Glass fibre body fillers
• Finishing putties
• Spray polyester putties
• Polyester laminating resins
• Fibreglass and composite repairs

Application

1. Ensure the polyester filler or resin is thoroughly mixed before adding the hardener.
2. Add the hardener according to the mixing ratio specified for the polyester product being used (typically 2–3% by weight for BOLL polyester fillers).
3. Mix until a uniform colour is achieved.
4. Apply the product immediately, observing the working time recommended by the filler or resin manufacturer.
5. Allow the product to cure completely before sanding or further finishing.

Suitable For

• Steel
• Galvanised steel
• Aluminium
• Fibreglass (GRP)
• Polyester laminates
• Properly prepared painted surfaces (depending on the filler or resin used)

Compatibility

BOLL Hardener is intended for use with BOLL Polyester Body Fillers, Spray Putty and Polyester Resin, and is also suitable for many other compatible 2K polyester repair products requiring a benzoyl peroxide hardener.