Professional Application Guide - Alexseal

Substrate Preparation & PrimingALEXSEAL ® Protective PrimersALEXSEAL ® Protective Primers are for use exclusively on substrates. Protective Primershave unique chemical inhibitors and bonding agents that have been formulated to beapplied only over substrate materials. ALEXSEAL ® Protective Primer 161, CF MetalPrimer 156 and Cor Spec Primer 135 comprise the family of ALEXSEAL ® ProtectivePrimers.ALEXSEAL ® Protective Primer 161 is an epoxy based primer used for interior andexterior applications. Due to specific corrosion inhibitors and a combination of epoxyresin binding agents, this primer offers excellent adhesion promotion on all substratesas well as corrosion protection on steel and aluminium substrates. ALEXSEAL ®Protective Primer 161 can be used for corrosion protection and adhesion promotionon steel and aluminium substrates, both above and below the waterline. This productis unique in that a surface primed with 161 can stand for up to 6 months and still beovercoated without the need for sanding.ALEXSEAL ® CF Metal Primer 156 is a chromate-free, high solid, epoxy-based primerdesigned for priming metal surfaces where excellent corrosion protection and chemicalresistance is required. ALEXSEAL ® CF Metal Primer 156 is designed to prime and sealnew and old, properly prepared, metal surfaces prior to the application of ALEXSEAL ®Topcoats or ALEXSEAL ® Finish Primer 442. This product is ideal for masts, hardwareparts and thin gauge metals where minimal fairing is required. It may be directly finishedwith topcoat or primed, depending on the application requirements. ALEXSEAL ® CFMetal Primer 156 may be used above and below the waterline.ALEXSEAL ® Cor Spec Primer 135 is a chromate-containing, two component epoxyprimer for use on metal substrates. This product is highly resistant to corrosionand chemicals. ALEXSEAL ® Cor Spec Primer 135 is designed to prime and seal oldand new, properly prepared, metal surfaces prior to the application of ALEXSEAL ®Topcoats or ALEXSEAL ® Finish Primer 442. This product is ideal for masts, parts andmetal substrates. It may be directly finished with topcoat or primed, depending on theapplication requirements. Cor Spec Primer 135 may be used above and below thewaterline.Once the surface is primed with Protective Primer 161, CF Metal Primer 156, or CorSpec 135, you may proceed to fill and fair the surface as needed. If no filling and fairingis required, you may proceed to the application of ALEXSEAL ® Finish Primer 442 and/or an ALEXSEAL ® Topcoat. According to the needs of your application, please see thefollowing sections:• “Fairing” starting on page 32• “Surfacing” on page 36• “Final Priming & Sealing” starting on page 39• “Finishing” starting on page 41Substrate Preparation & PrimingFinal Preparation for All Substrates: Two Rag Cleaning MethodImportant:Before moving on to the application of fairing compound, surfacing productsor topcoats, it is important to follow these steps to make certain the surfaceis free of particles of and contaminants of all sizes. Failing to follow this process couldresult in subsequent coatings not bonding properly, and defects that may becomeapparent after the finish coats are applied.Step 1: Use a shop vacuum or clean, dry compressed air source to remove dust andparticulates from the surface while wiping with a clean, oil free, and dry cotton cloth.Step 2: Wet one cloth with ALEXSEAL ® Surface Degreaser / Dewaxer (A9091) orALEXSEAL ® Wipe Down Solvent (A9049). Use this cloth to wet the surface and loosencontaminates. For information on choosing between the Surface Degreaser / Dewaxerand Wipe Down Solvent products, please see “Surface Preparation” starting on page22.Step 3: Use the dry, second cloth to wipe the surface and lift away or removecontaminates. Work small areas – approximately 1.2 m 2 (4 sq. ft.) or less – to keep thesolvent from evaporating before using the second rag to wipe clean. DO NOT allow thesolvent to dry on the surface prior to wiping it off.Repeat steps 2 and 3 – always keeping the rags clean – until the surface is clear of anycontaminates.Important:Using only one, wet cloth only serves to thin and dissolve contaminatesbefore simply spreading them around. Be sure the cloths used in proceduredo not have any contaminates.DO NOT use pretreated shop towels! Industrial paper towels are good choices touse for wiping down the surface, provided they do not have any chemical or pre-treatedadditives. When solvent wiping for ALEXSEAL ® Finish Primer 442, verify the entiresurface is completely dry before using tack rags.Tip:Use the “Application Record” starting on page 144 to document yourapplication process, equipment settings and environmental conditions forfuture reference. We’d recommend you make photo copies or print copies from theonline resources available at www.alexseal.com.30ALEXSEAL ® Professional Application Guide version 0.4.3ALEXSEAL.COM > Europe: +49 0 40 75 10 30 > North America: +1 843 654 775531