Renner YL-M641 Clear Sealer

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Price Range:£42.50 - £202.50
Price £42.50

Renner YL-M641 is a clear single-pack water-based sealer for interior use.

Perfect for use underneath Clear Water-based Topcoats, YL-M641 is Renner's premium high-build clear basecoat. Ready for use as a single-pack product, it will give excellent wood reviving properties, good horizontal & vertical hold and superb sanding. It’s perfect for working on wood with complex geometry such as turned parts and assembled furniture. Suitable for solid and veneer wood such as Oak, Ash, Cherry and Beech.

Areas of Use

Perfect for working on MDF and masonite products, such as flat parts, frames, baseboards and doors. If the sealer is catalised with 4% of YC-M400 it will reduce grain rising in MDF, increase thermoplasticity and durability which is ideal when manufacturing kitchens and bathrooms.


  • High clarity on finished work
  • Refreshes the wood
  • Good vertical hold
  • High build sealer
  • 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 2 hours
Sand Dry 8 hours


4 hours
Mixring Ratio 100:4
Activator YC-M402
Thinner 5% water if necessary
Pot Life N/A
Solids Content % 53 ± 1
Specific Gravity (KG/L) 1.3 ± 0.03
Viscocity 30” ± 5”(DIN 8 @ 23°C)
VOC (G/L) 47


Tech Data Sheet

Safety Data Sheet


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 2% of YC-M400 for increased thermo-plasticity.


YL-M641 can be overcoated with any of the clear water-based Renner Waterborne Topcoats, such as YO-**M863.

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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