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Application Guide - Above Waterline Application Systems

Priming


Application

Before any coating work, carefully prepare the surface of the substrate in accordance with the details outlined in the Surface Preparation section of the Application Guide and Product Datasheets.

Detailed information on surface preparation of previously painted surfaces and GRP substrates, prior to priming, can be found earlier in this guide.


Smooth sound condition

  1. After cleaning, sand the entire surface smooth with 120–180 grit paper. Remove all gloss from the previous finish.
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  1. Blow off the surface with clean, dry compressed air while dry wiping with clean rags to remove sanding dust and residue. Wipe surface with Awlgrip Wipe­-Down Solvent (NA/AP: Awlprep T0008; EU: Surface Cleaner T0340) using the Two Cloth Method.
  2. Apply specified number of coats of 545 Epoxy Primer or 321 HS Undercoat with the appropriate overcoating interval between coats.

Tip

High Build is an excellent barrier coat over underlying paint systems and can be used in the step above in place of 545 Epoxy Primer. However, if applying only 545 Epoxy Primer (provided sufficient DFT is applied and the sanded finish is acceptably smooth) this coat can be seen as the final priming step. Further application of 545 Epoxy Primer prior to topcoating would not be necessary.

Finish Priming options: 321 HS Undercoat can be used in place of 545 Epoxy Primer in areas with VOC restrictions. For brush/roll & tip applications, Awlquik may be preferred in place of 545 Epoxy Primer. Contact your local Technical Sales Representative for alternative schemes.

Following sanding, if necessary, surface is now ready for final prime and topcoat.

Rough condition, additional surfacing/filling required

  1. After cleaning, sand the entire surface smooth with 120–180 grit paper.
  2. Blow off the surface with clean, dry compressed air while dry wiping with clean rags to remove sanding dust and residue. Wipe surface with Awlgrip Wipe-­Down Solvent (NA/AP: Awlprep T0008; EU: Surface Cleaner T0340) using the Two Cloth Method. Fill or fair if necessary (see Fairing and Surfacing section for detailed information).

    If unnecessary, proceed to step 3.

  3. Apply specified number of coats of 545 Epoxy Primer or 321 HS Undercoat with the appropriate overcoating interval between coats.

Tip

High Build is an excellent barrier coat over underlying paint systems and can be used in the step above in place of 545 Epoxy Primer. However, if applying only 545 Epoxy Primer (provided sufficient DFT is applied and the sanded finish is acceptably smooth) this coat can be seen as the final priming step. Further application of 545 Epoxy Primer prior to topcoating would not be necessary.

Finish Priming options: 321 HS Undercoat can be used in place of 545 Epoxy Primer in areas with VOC restrictions. For brush/roll & tip applications, Awlquik may be preferred in place of 545 Epoxy Primer. Contact your local Technical Sales Representative for alternative schemes.

Following sanding, if necessary, surface is now ready for final prime and topcoat.