Novol 36112 Plus 720 – High-Performance Polyester Resin (1kg)
Reinforce and repair structural damage with Novol Plus 720. This 1kg unit is a professional-grade, unsaturated polyester resin designed for manual laminating. When combined with glass fiber mat or fabric, it creates a rigid, high-strength composite layer perfect for repairing perforated rust, reinforcing weakened panels, or creating custom automotive components.
Plus 720 is the go-to solution for structural "bridging" repairs where traditional body fillers would be too brittle or lack the necessary tensile strength.
The Resin System
This is a two-component (2K) product that requires a liquid organic peroxide catalyst (hardener) to cure.
- Included Hardener: Typically supplied with a small tube of dibenzoyl peroxide paste or liquid catalyst.
- Mixing Ratio: 100 parts Resin : 2–3 parts Hardener (by weight/volume).
- Curing Mechanism: An exothermic chemical reaction that transforms the liquid resin into a hard, impact-resistant solid.
Key Features & Benefits
- High Structural Strength: Once cured with glass fiber, it provides immense mechanical resistance to tension and vibration.
- Excellent Wet-Out: The low-viscosity formula quickly soaks into glass mats, ensuring no dry spots or air pockets are trapped in the repair.
- Versatile Substrate Adhesion: Bonds powerfully to steel, old paint coatings, polyester laminates, and wood.
- Weather & Chemical Resistance: Highly resistant to water, oils, greases, and diluted acids—ideal for underbody or marine-adjacent repairs.
- Thermal Stability: Maintains its structural integrity even under the thermal stresses of engine bays or direct sunlight.
Professional Application Strategy
Laminating is a messy process; preparation is the key to a clean, strong repair.
Application Steps:
- Preparation: Remove all loose rust and paint. Sand the area with P80–P120. Degrease thoroughly with Novol Plus 780.
- Glass Prep: Cut your glass fiber mat to the size of the repair before you mix the resin. You typically want 2 or 3 layers, each slightly larger than the last.
- Mixing: Mix the 2–3% hardener into the resin. Note: Too much hardener will cause the resin to "cook" and crack; too little will leave it tacky.
- Laminating:
- Brush a layer of mixed resin onto the repair area.
- Lay the first glass mat down and "stipple" it with the brush until it becomes transparent.
- Repeat for subsequent layers.
- Finishing: Once hard, sand the "shaggy" edges with P80. Since resin is porous, you must cover it with a polyester putty (like Novol Unisoft) to smooth the surface before priming.
Expert Insight: Polyester resin is excellent for strength but it is not waterproof in the long term. If you are repairing a hole in a floor pan or wheel arch, always seal the underside with an anti-gravel coating (like Novol Antigravel MS) to prevent moisture from wicking into the glass fibers.
