Lesson 1Paint chemistry and performance: acrylic, latex (PVA), alkyd/enamel, epoxy, and polyurethane — composition, UV resistance, flexibility, adhesionExamine how various binder chemistries affect adhesion, flexibility, chemical resistance, and UV stability. Compare acrylic, PVA latex, alkyd, epoxy, and polyurethane for indoor and outdoor textured applications, considering Namibia's sunny climate.
Role of binders, pigments, and solventsAcrylic versus PVA latex propertiesAlkyd and enamel behaviour on trimEpoxy coatings for high-wear areasPolyurethane for abrasion resistanceVOC, odour, and curing considerationsLesson 2Sealants, waterproofing and damp-proofing products: silane/siloxane repellents, cementitious waterproofing, liquid-applied membranes, acrylic waterproofersExplore sealers and waterproofing systems to manage water and moisture entry. Learn applications for silane and siloxane repellents, cementitious slurries, liquid membranes, and acrylic waterproofers in wall structures, vital for Namibia's variable weather.
Capillary absorption and water ingressSilane and siloxane water repellentsCementitious waterproof coatingsLiquid-applied waterproof membranesAcrylic waterproofers for facadesDetailing joints, cracks, and terminationsLesson 3Finishes and sheens: flat/matte, eggshell, satin, semi-gloss, gloss — cleaning durability, hiding power, and recommended usesInvestigate typical paint sheens and how gloss levels influence appearance, durability, and ease of cleaning. Choose suitable finishes for walls, ceilings, trim, and textured surfaces based on usage in homes and buildings across Namibia.
Gloss scale from flat to high-glossEffect of sheen on hiding defectsCleanability and stain resistance by sheenSheen selection for walls, ceilings, trimSheen choices over textured surfacesLesson 4Selection criteria matrix: durability, breathability, vapor permeability, elasticity, UV/weather resistance, maintenance and cleanabilityMaster comparing products with a matrix focusing on durability, breathability, vapor permeability, elasticity, UV resistance, and upkeep needs. This helps justify choices for projects in Namibia's diverse environments, from coastal to arid areas.
Defining key performance criteriaRating durability and abrasion resistanceAssessing breathability and permeabilityEvaluating elasticity and crack bridgingUV, chalking, and colour retention factorsMaintenance cycles and life-cycle costLesson 5Substrate-specific compatibility: interaction of paints/primers with cement-render, lime renders, gypsum plaster, and painted-over texturesGrasp how substrates interact with primers and paints, including effects of porosity, alkalinity, and movement on adhesion. Specify compatible systems for cement, lime, gypsum, and existing textured coatings common in Namibian construction.
Porosity and suction of mineral substratesAlkalinity and curing of cement rendersLime render compatibility and carbonationGypsum plaster and joint compound issuesPainting over existing textured coatingsLesson 6Texture compounds and base media: premixed texture compounds, joint compound, gypsum-based textures, acrylic texture compounds — workability, curing, and paintabilityReview primary texture base materials for painting, such as premixed textures, joint compound, gypsum, and acrylic systems. Compare their workability, open time, curing, and acceptance of primers and topcoats for reliable results.
Premixed texture compounds overviewJoint compound as a texture baseGypsum-based texture mixes and setsAcrylic texture compounds and resinsCuring, shrinkage, and cracking risksPriming and painting textured surfacesLesson 7Primer types and functions: cement primers, alkali-resistant primers, gypsum/gypsum-board primers, bonding primers, stain-blocking primers, and anti-efflorescence primersUnderstand primer roles in enhancing adhesion, controlling suction, blocking stains, and resisting alkali and efflorescence. Select appropriate primers for cement, gypsum, and challenging substrates in local building practices.
Functions of primers versus sealersCement and alkali-resistant primersPrimers for gypsum and drywall boardsBonding primers over glossy surfacesStain-blocking and tannin-blocking primersPrimers to control efflorescenceLesson 8Additives and special-purpose products: mildewcides, anti-carbonation coatings, anti-efflorescence treatments, sacrificial coatings, corrosion-inhibiting primersReview additives and specialty coatings addressing moisture, biological growth, carbonation, efflorescence, and corrosion. Specify mildewcides, anti-carbonation, sacrificial, and inhibitive primers for Namibia's humid and dry zones.
Biocides and mildewcides in coatingsAnti-carbonation coating mechanismsAnti-efflorescence primers and sealersSacrificial coatings for graffiti controlCorrosion-inhibiting primers for metals
