Bostik N40 Primer

Bostik N40 Primer is a fast-drying, clear, and non-staining solvent-based primer/cleaner, specially designed to enhance the adhesion of polyurethane sealants and waterproof membrane systems on non-porous substrates.
Vendor: Bostik
SKU: PRIMEN40/1
Availability: In Stock
$40.87
$40.87

Physical Properties

Colour: Clear
Viscosity: Thin, colourless liquid
Coverage: Approx. 50 lineal metres of joint per litre
Drying time: 5 to 10 minutes
Flashpoint: 12°c
Specific gravity: 0.8 g/ml
Application temperature: 5°c to 35°c
Composition: Moisture-sensitive solvent-based primer
Shipping & Delivery

$15.95 shipping on all orders nationwide, except for dangerous goods, oversized items, and bags 15 kg or more.

Bostik N40 Primer
Vendor: Bostik
Bostik N40 Primer
$40.87
Vendor: Bostik
Bostik N40 Primer
$40.87

Bostik N40 Primer is a clear, solvent-based primer/cleaner specifically designed to enhance the adhesion of polyurethane sealants, acrylic sealants, and waterproof membrane systems to non-porous substrates. Its fast-drying formula and ease of use make it a valuable tool for construction professionals and those working with metals and rigid plastics.

Key Features

  • Clear Appearance: Does not stain or discolour surfaces.
  • Fast Drying: Ready for sealant or membrane application in 5-10 minutes.
  • High Bond Strength: Promotes optimal adhesion of sealants and membranes.
  • One-Part: No mixing required, ready to use.

Uses

  • Priming non-porous substrates like rigid plastics (ABS, uPVC) and metals (brass, bronze, copper, aluminium, steel, etc.) before applying sealants or membranes.
  • Specifically recommended for use with Bostik Seal 'N' Flex 1, Seal 'N' Flex FC, Construction PU, Fireban One, and Matrix FC polyurethane sealants.
  • Suitable for various applications, including construction, automotive, and industrial projects.

Benefits

  • Improves adhesion of sealants and membranes on non-porous surfaces.
  • Prevents sealant failure and ensures a long-lasting bond.
  • Easy and quick to apply using the two-cloth method.
  • Clear formula ensures no staining or discolouration.

Application Guide

  1. Ensure the substrate is clean, dry, and free from contaminants.
  2. Dampen a clean cloth with Bostik N40 Primer and wipe the surface.
  3. Immediately use a second clean cloth to remove any primer residue.
  4. Allow the surface to dry for at least 5 minutes before applying sealant/adhesive or membrane.
  5. Apply sealant/adhesive or membrane within 4 hours of priming.

Limitations

  • Use only on recommended non-porous substrates (see primer selection table).
  • Do not dilute or mix with other solvents or primers.
  • Ensure the surface is free of water and condensation before applying sealant/adhesive or membrane.
  • Re-prime if the surface is exposed to rain, dust, or other contaminants after application.

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