Sikagard®-6440
Sprayable underbody and stone chip protection coating
Sikagard®-6440 is a durable, thixotropic, rubber-based protective coating with very good rust-proofing and sound deadening properties. It is suitable for an effective underbody and stone chip protection to the vehicle body and convinces with its excellent final performance. Original texture can easily be reproduced.
Sikagard®-6440 shows a good over paintability performance.
A tough coating remains after drying, protecting metal from impact and corrosion.
- Easy applicaton with no running or dripping
- Good abrasion, impact and road salt resistance
- Variours finishes achievable
- Good adhesion performance
- Over paintable
- Very good low temperature behavior
- Free of heavy metal
- Remains flexible when dry
PRODUCT BENEFITS
- Easy applicaton with no running or dripping
- Good abrasion, impact and road salt resistance
- Variours finishes achievable
- Good adhesion performance
- Over paintable
- Very good low temperature behavior
- Free of heavy metal
- Remains flexible when dry
Areas of Application
Sikagard®-6440 is a spray applied anti-corrosion coating for repair and protection of vulnerable, painted parts of vehicles such as door sills, wheel arches, front and rear aprons as well as vehicle underbody parts.Sikagard®-6440 shows good adhesion on different paints, metal primers, metals and PVC.
This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.
Product Details
| Chemical base | Rubber based | |
| Color (CQP001-1) | Black / grey | |
| Cure mechanism | Air-drying | |
| Density (uncured) | 1.05 kg/l | |
| Solid content | 49 % | |
| Application temperature | 15 ─ 25 °C | |
| Film thickness | wet dry | 600 µm 300 µm |
| Tack free time | 60 minutes A | |
| Drying time | 24 h A | |
| Service temperature | -30 ─ 90 °C | |
| Shelf life | 24 months B |
| CQP = Corporate Quality Procedure | A) 23 °C / 50 % r. h. | B) storage between 5 °C and 25 °C |
CHEMICAL RESISTANCE
Sikagard®-6440 is resistant against water, seawater, salt spray, oil, bases and acids.
The above information is offered for general guidance only. Advice on specific applications will be given on request.
Application
Surface preparation
Surfaces must be clean, dry and free of rust, dust and grease. Bare metal must be pre-treated to enhance corrosion resistance (e.g. uncoated steel, etc).
Application
Sikagard®-6440 can be applied by air-mix guns with an air pressure of 3 - 6 bar. Use either the Sika® SCP Gun (pressure cup type) or the Sika® UBC Gun (vacuum type) to apply the product.
Shake can approx. 40 times before use. Cover adjacent surfaces prior the spray process. Spray at room temperature and from a distance of approx. 25 cm in an grid motion to build up a continuous coat.
Sikagard®-6440 can be applied without dripping. Apply this product until the desired layer thickness is reached. If a thick layer is required, let layers dry in between. A wide variety of textures can be achieved by altering the spray technique. Do not spray on parts of the brake, engine or exhaust system.
Removal
Uncured Sikagard®-6440 can be removed from tools and equipment with Sika® Remover-208 or another suitable solvent. Once dried, the material can only be removed mechanically. Hands and exposed skin shall be washed immediately using hand wipes such as Sika® Cleaner-350H or a suitable industrial hand cleaner and water.
Do not use solvents on skin.
Overpainting
Sikagard®-6440 is over paintable in a dry state (after 24 hours) with commonly used conventional paint systems. Waiting time can be reduced by accelerated drying at max. 60°C. Due to the wide range of paints adhesion and compatibility tests are necessary.