The image shows a bottle with a red cap and a white label. On the label it says "BLR" and "Red Tamper Evident Seal". The bottle contains a clear liquid.

Product Family

BLV / BLR Screw locking varnish

One-component, air-drying and tamper-proof sealant for screws, nuts, screwable parts and other components, among other things

  • Ideal for use on knobs to ensure settings do not move under vibration etc.
  • Good anti-fungal properties, resists mold growth
  • With integrated brush for easy application
  • available in green (BLV) or red (BLR)


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