Renner YL-M643 Primer

Available In Store
  • Suitable for all kinds of wood
  • Good vertical hold
  • Long pot life after catalyst
  • High pigment & covering power
  • Superb sanding ability
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TOTAL £68.91
TOTAL:£68.91 - £342.47Incl. VAT
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Please note, next-day delivery and paid pre-12 delivery is not guaranteed on this product. Depending on how busy the lab is, orders may take up to 2-3 working days. To increase the likelihood of next-day delivery and paid pre-12 delivery, orders for bespoke  colours (inlcuding grey primers) must be placed by 11am to assist the lab. 

Areas of Use

Perfect for working on all wood and MDF on projects such as fitted furniture, doors and turned parts. If the primer is crosslinked with 1% of YC-M402 it will reduce grain raising in MDF, increase thermoplasticity and durability, ideal when manufacturing kitchens & bathrooms.


  • Suitable for all kinds of wood
  • Good vertical hold
  • Long pot life after catalyst
  • High pigment & covering power
  • Superb sanding ability

Technical Information

Brand Renner
Application Conventional Spray, Airmix Spray, Airless Spray, Electrostatic Spray
Coverage (G/M²) 150 - 250 per coat
Coats 1 - 3 Max.
Touch Dry 1 hour
Sand Dry 2 hours


4 hours
Mixing Ratio 100:1
Activator YC-M402
Thinner 5% water if necessary
Pot Life N/A
Solids Content % 50 ± 2
Specific Gravity (KG/L) 1,25 ± 0.05
Viscosity 50” ± 10”(DIN 6 @ 23°C)
VOC (G/L) 50


Please email to request an up-to-date technical/safety data sheet for this product.


We suggest 240-320 grit abrasives. For best results, use stearate abrasives. They provide higher efficiency than normal abrasives. Ensure the surface is completely clean of debris before coating. See our pages for suitable abrasives for water-based products.


With good drying conditions and with good air circulation (20°C with 65% humidity), build can be achieved with just 2 to 3 coats. Each coat of 150 - 250 G/M² with an interval of 60 mins. Under these circumstances it can be sanded after 8 hours. Lower temperatures and higher relative humidity can lead to a longer drying time. It is possible to speed up drying using heated ovens. Can be catalysed 1% of YC-M402 for increased thermo-plasticity.


YL-M643 can be overcoated with any of the pigmented Renner Waterborne Topcoats.

Please Note

It is important to understand when switching over from a solvent-based coating system to water-based, to check whether your equipment and apparatus are appropriate or whether you may require more suitable solutions. AllFinishes are able to advise you on electrostatic guns, pumps, seals, silicones, glues, booth treatment products, packaging materials fillers and abrasives. Click the contact us button to get some free technical advice.


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