Repair a damaged car hood

Using and applying a fine filler

Collision repair is an important field of activity in body shops especially with the focus on preserving resources by repairing instead of exchanging damaged parts. Body fillers are great to restore the original shape of damaged parts as they are sandable, adhere to metal, glass fibre, aluminium and all paintable plastics (based on selected body filler) and withstand body movements, vibrations and minor knocks. Making it last for the life time of a vehicle.

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In our instruction we show an example of rebuilding the surface of a car hood after damage using a fine filler. Make sure to use the correct body filler based on the substrate you work on.

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All repair and maintenance tasks shown should be done by professionals only. Please do not try this at home or if not qualified by professional education. Always follow car manufacturer's instructions.
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STEP 1

Preparation I

Clean and pre-treat with TEROSON^® VR 10. Remove existing paint film exposing an area of 5-10 cm wider than area to be repaired exposing bare metal.

STEP 2

Preparation II

Feather edge the remaining paint film with P120 followed by P150 to create a gentle slope to which filler can merge. Thoroughly clean and degrease sanded area with TEROSON^® VR 10.

STEP 3

Mixing technique I

Make sure to have a clean, non-absorbent mixing board and applicator. Mix 50 gms of filler paste (TEROSON^® UP 210) to 4-5 gms of hardener (golf ball to a pea ratio). Use a gentle folding action when mixing the hardener to avoid adding air.

STEP 4

Mixing technique II

Mix thoroughly until all traces of the red hardener are fully blended into the paste. Do not mix more than what can be used and applied in four minutes.

STEP 5

Spreading of filler

Using a clean spreader apply a thin layer of mixed filler on the metal surface (max. of 2 mm for best result). Use a spreading action—pressing the filler paste into the grooves created by initial sanding.

STEP 6

Levelling filler

Fill immediately to the required level ensuring air is not trapped.

STEP 7

Curing

Let filler cure at room temperature. Accelerated cure can be done using an infrared heater (surface temperature max. 65 °C) after 10 minutes of room curing. Avoid using a hot-air gun!

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Frequently Asked Questions

ANSWERS TO YOUR MOST COMMON QUESTIONS

There are several reasons for pin-holing such as poor mixing technique, usage of body filler on porous surface or wrong storage. Thus, make sure to check surface to be even, dry and clean. Use a gentle folding action when mixing the hardener to avoid adding air. Store at room temperature (20°C + / - 8°C).

The reasons can be manifold. Insufficient usage of hardener (use of too little hardener can cause rollback of the product on the thin edge of the application area) or too little mixing might be the reason (filler paste and hardener do not create a uniform texture). Also, incorrect application temperature or storage temperature might be the reasons. See the TDS for that.

^{Limitation of Liability}

^{The information provided herein, especially recommendations for the usage and the application of our products, is based upon our knowledge and experience. Due to different materials used as well as to varying working conditions beyond our control we strictly recommend to carry out intensive trials to test the suitability of our products with regard to the required processes and applications. We do not accept any liability with regard to the above information or with regard to any written or verbal recommendation, except if otherwise explicitly agreed and except in relation to death or personal injury caused by Henkel´s gross negligence or intention and any liability under any applicable mandatory product liability law. Please note that the information provided by us may not be current, complete and correct. It is not intended to serve as legal advice. Each user is solely responsible for assessing and ensuring compliance with any applicable law. The information is protected by copyright. In particular, any reproductions, adaptations, translations, storage and processing in other media, including storage or processing by electronic means, enjoy copyright protection. Any exploitation in whole or in part thereof shall require the prior written consent of Henkel Corporation. Except as otherwise noted, all marks used in this sell sheet are trademarks and/or registered trademarks of Henkel and/or its affiliates.}