Seal-it® 520 PANELPRIMER

Seal-it® 520 PANELPRIMER is a highly effective black adhesive primer, specifically for the priming of untreated wood, such as timber works and slats, which cures through humidity and forms into a durable membrane.



  • Specially developed as a durable adhesion promoter for untreated wood.
  • As a high quality primer for lasting protection of surfaces from moisture and water loads, to guarantee a strong and lasting bond/adhesion.
  • To counter the absorption effect from untreated wood.
  • Suitable for use with sealants and adhesives based on silicone, hybrid polymer and MS-polymer® and polyurethane.


  • Improves the adhesion of sealants and adhesives to untreated wood.
  • Forms a durable, non-porous membrane to protect from moisture and water loads.
  • Stops absorption from porous base surfaces.
  • Secures hard-to-remove dust particles to the bonding surface.
  • Drying time approx. 60 minutes, depending on the humidity.
  • Forms a durable barrier against mould and wood rot.
  • Joints between panels are finished in black, which eliminates the need for black rubber profiles.
  • Easy to apply with a brush or roller.
  • Ready to use, 1 component.
  • Excellent resistance to UV, weather, water, moisture and ageing.

Application conditions

  • Application temperature (ambient and surface) between +5 °C and +35 °C.
  • Before use, shake and/or mix SEAL-IT® 520 PANELPRIMER well so it forms a homogeneous mass.
  • Use a brush suitable for the purpose to remove any loose particles from bonding surfaces or other surfaces before applying Seal-it® 520 PANELPRIMER.
  • Bonding surfaces and other surfaces must be dry, clean, uncontaminated, grease-free, dust-free, compatible and stable.
  • First use Seal-it® 510 CLEANER to degrease/clean greasy or contaminated surfaces properly before applying Seal-it® 520 PANELPRIMER.
  • Use a suitable brush or roller to apply SEAL-IT® 520 PANELPRIMER evenly and not too thickly.
  • If the sealant is not applied within the maximum drying time, you must sand off the old coat of primer and then apply the primer again.
  • After use, close the canister as quickly as possible, so the SEAL-IT® 520 PANELPRIMER does not harden.

Standard product line


1000 ml can



SI-XXX-XXXX-XXX = Article number.
Other colours and/or packaging on request.


Technical support department

Connect Products has a state-of-the-art R&D laboratory, where experienced specialists continuously research and develop sealants, adhesives and PU foams. Customers and clients can have products researched, tested and developed by this department. You can also contact us for technical advice, tips, project support, warranty certificates, requests and other technical questions. We will be happy to assist you with high-quality technology.

Call us on +31 (0)183 731 400 or send us an e-mail.

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