TheIsopon P.40 Body Filler for Holes (600ml) is a high-strength, fibreglass-reinforced body filler designed specifically to repair holes and rust damage in automotive and metal surfaces. Engineered to repair holes up to 75mm wide, this filler offers excellent adhesion and forms an ultra-tough, long-lasting bond with most metals, making it ideal for structural repairs where added strength is essential.

Its thick, durable consistency is ideal for bridging gaps, reinforcing weak areas, and building up damaged panels. Once cured, P.40 can be sanded smooth and overcoated with conventional body fillers (e.g., Isopon P.38) or primers for a seamless finish.

Key Features

• Fibreglass Reinforced: Strengthened with glass fibres for added durability and resistance to cracking or shrinking
• Repairs Holes up to 75mm Wide: Ideal for bridging medium-sized gaps in bodywork
• Excellent Adhesion: Bonds firmly to most types of metal surfaces, including steel and aluminium
• Long-Lasting Results: Forms a rigid, weather-resistant structure suitable for automotive repairs
• Overcoatable: Can be overcoated with smoother fillers (e.g., P.38) or primed and painted
• Quick and Easy Application: Mixes easily with the supplied hardener and applies smoothly

Product Dimensions & Weight

Technical Specifications

• Filler Type: Two-part polyester body filler reinforced with fibreglass
• Surface Compatibility: Suitable for most metals (not recommended for plastic or wood)
• Maximum Repair Size: Up to 75mm wide
• Application Tools: Spreader or filler knife
• Curing Time: Approx. 2030 minutes depending on temperature and hardener ratio
• Sanding: Can be sanded after curing; recommend coarse grit (P80P120)
• Overpainting: Overcoat with conventional filler, primer, and paint after preparation
• Commodity Code: 3404900000
• Country of Origin: Great Britain
• Storage: Store in a cool, dry place with container tightly sealed

Warranty Information

Isopon P.40 Body Filler is manufactured under strict quality standards to ensure consistent performance and durability.

• Warranty Coverage: Covers manufacturing defects and product consistency
• Conditions: Must be used according to instructions on a suitable substrate
• Exclusions: Improper use, storage, or application on incompatible materials
• Support: Proof of purchase required for warranty and support services

Frequently Asked Questions (FAQs)

Q1: Can I use P.40 on plastic or fiberglass panels?
A1: P.40 is designed specifically for use on metal. For plastic or fiberglass surfaces, consider using a plastic-compatible filler.

Q2: Do I need to use a finishing filler after P.40?
A2: Yes. P.40 is a structural filler and may not sand to a perfectly smooth finish. For best results, apply a smooth finishing filler like Isopon P.38 on top before painting.

Q3: Is the hardener included in the 600ml kit?
A3: Yes, the product includes the appropriate amount of BPO (benzoyl peroxide) hardener.

Q4: How thick can I apply the filler in one go?
A4: P.40 can be applied in layers up to around 56mm thick. For deeper repairs, build up in layers, allowing each to cure before applying the next.

Q5: How soon can I sand or paint over the filler?
A5: Typically, sanding can begin after 2030 minutes. Painting should follow once the filler is fully cured, sanded, and primed.

Q6: Is it waterproof?
A6: Once cured and overcoated with primer and paint, the repair will be water-resistant and suitable for exterior use.

The Isopon P.40 Body Filler for Holes 600ml is a trusted solution for strong, durable metal repairs. With its fibreglass reinforcement and ability to bridge medium-sized holes, it delivers reliable performance for automotive and metalworking professionals and enthusiasts alike.