Spray putty - Polyester putty

Technical description of Sprayable Putty :

In the world of car body repairs, Sprayable Putty has established itself as a modern, high-performance alternative to traditional putties. Designed to be applied with a spray gun, it offers unrivalled precision, even application and considerable time savings in the workshop. It's the preferred choice of professional bodybuilders looking for a product that's effective, fast and easy to sand.

What is Sprayable Putty?

Sprayable putty is a two-component putty (polyester base + Hardener) packaged for mechanical application using a suitable gun. Unlike manual putties, it comes in a fluid, regular form, allowing you to work more quickly on large surfaces while maintaining an excellent quality finish.

It is particularly popular with bodybuilders for :

• Large or hard-to-reach areas
• Repairs to complete panels
• Smoothing work requiring a uniform surface without excess material.

Technical characteristics of Sprayable Putty :

Sprayable putty features a balanced formulation between flexibility and strength, guaranteeing optimum adhesion to bare metal, steel, aluminium or old sanded putties.

Its main characteristics are

• Spray application: even flow, uniform film and precise thickness control
• Suitable viscosity: fluid texture for easy application, with no drips
• Fast drying: reduced drying time, ideal for high-output workshops
• Excellent sandability: once cured, it sands easily without clogging abrasives
• High adhesion: compatible with a wide range of bodywork substrates (steel, aluminium, polyester)
• Dimensional stability: does not shrink and retains its volume after curing

Advantages of Sprayable Putty for bodywork :

Sprayable putty offers many advantages for professionals who want to optimise their productivity and the quality of their repairs.

1. Fast, even application:

Spray application ensures an even spread, without spatula marks. Bodybuilders save time while obtaining a perfectly smooth surface, ready for sanding or priming.

2. Better control of the material:

Thanks to flow control, it is possible to adjust the amount of product applied according to the size and depth of the defect to be corrected. This reduces material loss and minimises Touch up.

3. Guaranteed professional results:

Sprayable putty gives a flawless finish with a smooth transition between repaired and sound areas. It eliminates the risk of excess thickness and guarantees perfect flatness before painting.

4. Reduced fatigue and application time :

Less physical effort, less time spent spreading the product: Sprayable Putty is a real comfort booster for bodybuilders working on large volumes or demanding sites.

5. Compatibility and versatility:

This type of putty can be applied to a wide range of substrates: steel, aluminium, galvanised, polyester, old sanded putties. It can then be covered with a finishing putty or a filling primer as required.

How do I apply Sprayable Putty?

Sprayable putty is easy to apply and is designed for fast, precise bodywork repairs. Thanks to its fluid, even texture, it can be applied evenly to large surfaces or hard-to-reach areas. However, to guarantee a professional result, it is essential to follow an application method.

1. Substrate preparation :

Careful preparation is essential to ensure that the product is waterproof and adheres well.

• Clean and degrease the surface with a suitable product to remove all traces of grease, silicone and dust.
• Sand the area to be repaired (P80 to P120 grit) down to the bare metal or the sanded Putty.
• Remove dust carefully with a clean cloth or compressed air.

Tech'team tip: Sprayable putty should only be applied to rigid, clean surfaces. Poor preparation can lead to blistering or poor adhesion.

2. Preparation for Sprayable Putty :

Sprayable putty is a two-component product which must be mixed with a Hardener before application:

• Place the required quantity of Putty in the appropriate spray gun
• Add the percentage of Hardener recommended by the manufacturer (generally 2 to 3% by volume)
• Mix until a uniform, homogeneous colour is obtained.

Too much Hardener speeds up drying and can make the Putty brittle, while too little prevents it from hardening completely.

3. Setting and spraying:

To apply Putty correctly:

• Adjust the gun: pressure and flow rate must be adapted to the desired thickness and the surface to be covered.
• Hold the gun perpendicular to the surface and apply the Putty in thin, even layers.
• For deep or wide repairs, make several successive passes, allowing each coat to harden slightly

Tech'team tip: Keeping a constant distance between the gun and the surface will ensure an even film and reduce drips.

4. Drying time :

Drying time varies according to temperature and the amount of Hardener used:

• At 20°C, complete polymerisation generally takes 20 to 30 minutes.
• Once cured, the Putty becomes hard and sandable, ready for the next stage.

Be careful never to sand a fresh putty, as this could tear the material and create irregularities.

5. Sanding and finishing :

Once the surface is self-drying, sand coarsely with a P80-P120 grit to obtain the desired shape, then use a finer grit (P180-240) before applying a Universal putty or a filling primer.

Sprayable putty is compatible with all standard finishing putties and primers, providing a smooth, stable base for paint.

Applying a Sprayable Putty correctly is a combination of careful preparation, precise dosage and controlled application. When used in the right conditions, it enables professional bodybuilders to obtain a uniform, solid surface ready for finishing.

The different Sprayable Putties available on the Carross website:

1. Carross Sprayable Polyester Putty :

MPIST1 is a polyester putty with high filling power, fast drying and high thixotropic properties. This unbeatable value-for-money product is practical and easy to apply to bodywork surfaces. Packaged in 1-litre cans, it offers great flexibility and adhesion on a wide range of substrates including steel, Galvanized steel, aluminium, wood and polyester.

2. Spray Putty 5150.3101 4CR :

This Putty from 4CR, is a product available in 290ml and can be painted quickly. It also dries very quickly and has a low viscosity. It does not create bubbles when used and is non-corrosive. In fact, it has excellent adhesion, even without primer, on almost all substrates. This product is versatile, with a choice of fine and/or heavy spray, which can be achieved by regulating air pressure and product dosage.

3. Cromax 799R Sprayable Putty :

Putty from Cromax is specially recommended for bare steel, aluminium and Fiberglass-reinforced polyester. This product has a fine, homogeneous structure and is easy to apply, with good resistance to running. It also gives the bodywork a high level of filling power and is easy to sand. It is suitable for IR drying and provides good surface protection.

4. Glasurit Putty P-B-67 :

P-B-67 Sprayable Putty is a high-performance ProClass undercoating solution designed for automotive applications requiring fast, even surface correction over large areas. This type of putty can be applied to: original parts with cataphoresis, old paints, GRP/SMC, Galvanized steel, aluminium and steel. P-B-67 is ideal for smoothing out dents and irregularities with a minimum number of coats.

The Sprayable Putty is therefore a product specially designed for the automotive bodywork sector, enabling dents and holes on metal or polyester bodywork to be repaired effectively. Thanks to its two-component composition, it combines optimum filling properties to achieve a uniform surface. For long-lasting, attractive results, it's essential to follow the application instructions, applying the Putty layer by layer and making sure to fill in each area to be repaired. This product is an essential tool for professionals who want to combine speed, precision and quality in their bodywork work.