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 suitable for Eritrea's climate.
Role of binders, pigments, and solventsAcrylic versus PVA latex propertiesAlkyd and enamel behavior on trimEpoxy coatings for high-wear areasPolyurethane for abrasion resistanceVOC, odor, and curing considerationsLesson 2Sealants, waterproofing and damp-proofing products: silane/siloxane repellents, cementitious waterproofing, liquid-applied membranes, acrylic waterproofersExplore sealers and waterproofing systems that prevent water and moisture entry. Learn applications for silane and siloxane repellents, cementitious slurries, liquid membranes, and acrylic waterproofers in wall structures common in Eritrean architecture.
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 common paint sheens and how gloss levels influence appearance, durability, and ease of cleaning. Select appropriate finishes for walls, ceilings, trim, and textured surfaces based on usage in Eritrean interiors and exteriors.
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 cleanabilityUse a structured matrix to evaluate products based on durability, breathability, vapor permeability, elasticity, UV resistance, and maintenance requirements, helping you make informed choices for projects in Eritrea's varied environments.
Defining key performance criteriaRating durability and abrasion resistanceAssessing breathability and permeabilityEvaluating elasticity and crack bridgingUV, chalking, and color retention factorsMaintenance cycles and life-cycle costLesson 5Substrate-specific compatibility: interaction of paints/primers with cement-render, lime renders, gypsum plaster, and painted-over texturesUnderstand interactions between substrates and primers or paints, considering porosity, alkalinity, and movement. Specify compatible systems for cement, lime, gypsum, and existing textured coatings used in traditional Eritrean building practices.
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 materials like premixed compounds, joint compound, gypsum, and acrylic systems. Compare their workability, open time, curing, and compatibility with primers and topcoats for local applications.
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 primersExplore primer roles in enhancing adhesion, controlling suction, blocking stains, and resisting alkali or efflorescence. Choose primers for cement, gypsum, and challenging substrates prevalent in Eritrean construction.
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 primersInvestigate additives and specialty coatings addressing moisture, biological growth, carbonation, efflorescence, and corrosion. Specify mildewcides, anti-carbonation, sacrificial, and inhibitive primers for humid or coastal Eritrean settings.
Biocides and mildewcides in coatingsAnti-carbonation coating mechanismsAnti-efflorescence primers and sealersSacrificial coatings for graffiti controlCorrosion-inhibiting primers for metals
