2K Etch Primer Technical Data Sheet 16.05.03
L2.03.01
Description Two component, chromate free, etching primer surfacer for general use in refinishing cars and also light commercial vehicles. For fast turn round work, only denibbing with Scotch Brite is necessary prior to the application of topcoat.
3:2 2K Etch Primer Activator Etch Primer
Mixing Ratio Chart or Mixing Stick B
2 -3 x 1 1.5 - 1.8 mm 2 - 3 bar
5 – 10 mins
1 hrs 20°C 20 mins 60°C
Product & Ancillary Items Product Lesonal 2K Etch Primer Activator Lesonal Activator Etch Primer Chemical Basis • 2K Etch Primer - Combination of polyvinyl butyral, and other special resins • Activator Etch Primer - Combination of organic solvents and phosphoric acid
Method of Use Substrates Sound original finishes with the exception of thermoplastic acrylics Steel Zinc coated steel Aluminium Lesonal Polyester Body Filler Lesonal Polyester Spraying Filler Substrate Preparation
Mixing Ratio
Prior to commencing any sanding work, thoroughly cleanse the surface of any grease or wax with Lesonal Degreaser SB. Apply using two cloths in a wipe on, wipe off process. Original finishes - sanding with P280 grit dry or P600-P800 wet. Steel – remove all traces of rust and abrade thoroughly until a clean surface is achieved. Any millscale should be removed by shot blasting. Aluminium and zinc coated coated steel - abrade thoroughly with Scotch Brite Brite 447 (Red). Lesonal Polyester Body Filler - finish sand with P280 grit dry. After sanding work is completed and just prior prior to the application of primer, degrease degrease again thoroughly with Lesonal Degreaser SB. Use Mixing Ratio Chart or Mixing Stick B 3 volumes - 2K Etch Primer 2 volumes - Activator Etch Primer Mix in a parallel sided mixing vessel and stir well before use.
2K Etch Primer Technical Data Sheet 16.05.03 Spraying Viscosity
L2.03.01 When mixed as described the correct spray viscosity is achieved. 20-22 secs DIN Cup 4 at 20°C
Pot Life After mixing the mixture must be used within 2 days at 20°C.
Gun Set Up & Spraying Pressure
Spray Gun LVLP (HR) Gravity Feed HVLP Gravity Feed Conventional Gravity Feed
Fluid Opening 1.8 - 2.0 mm 1.8 - 2.0 mm 1.5 - 1.8 mm
Spraying Pressure 2.0 - 3.0 bar 0.7 bar 3.0 - 4.0 bar
Application Technique Apply two or three single coats; allow to dry until matt between each coat. Generally this will take 5 - 10 minutes. (This time will be very much influenced by factors such as temperature and air movement at the time of application.) If the product is to be applied over a fresh synthetic finish, it is recommended that a thin coat is applied first, and that care is taken in applying subsequent coats. Flash off times between each coat should be also extended. Build per Coat Sprayed Theoretical Usage
Equipment Cleaning
20 - 25 microns 2
12 m per litre at a layer thickness of 15µmicrons (the practical material usage depends on many factors, i.e. shape of the object, roughness of the surface, application method and application circumstances) Use a nitrocellulose thinner.
Drying Times Dry to sand Dry to denib (with Scotch Brite) Dry to recoat with Primer / Filler
Half power Total time
at 20°C 1 hour 20 mins 15 mins Infra red short wave equipment 5 mins flash off 7 mins low 12 mins
When recoating with a topcoat, it is always necessary to at least denib the product with Scotch Brite. Recommended Sanding Grades
Method Wet, by hand or machine Dry, by hand Dry, by machine
Sandpaper Grade P800 - P1000 P400 - P500 P400 - P500
2K Etch Primer Technical Data Sheet 16.05.03 Helpful Tips
L2.03.01 To ensure maximum adhesion on bare metal surfaces, apply the product to these in full, wet, flowing coats. If the Lesonal 2K Etch Primer is allowed to dry longer than 6 hours, it should be thoroughly sanded before a topcoat/filler is applied. Do not apply the product in a relative humidity greater than 90 %, or if the substrate is at dew point i.e. condensation has formed on the surface. Wait until conditions improve and the surface has dried out. For spraying large surfaces or spraying in warmer conditions, Lesonal 2K Etch Primer may be thinned up to a maximum of 10% with Multi Thinner Standard or a good quality nitrocellulose thinner.
Shelf Life
2K Etch Primer : 1.5 years Activator Etch Primer : 2 years
Explanation of Batch Numbers Example: 022 2 168 041 Production plant 022 Year of production 2 Day of production 168 041 Colour
Number of the batch made that day
Greyish green
Health & Safety Data: These products are intended for professional use only. Please refer to can labels and Safety Data Sheets concerned for more specific information. The user of these products is required to comply with the national laws pertaining to Health & Safety disposal. The above information is given in good faith, but without warranty, as the final results are also dependent upon factors of use which are outside our control.
