Experts, I have a question: since construction reasons require the use of epoxy thick-sealant paint as a primer, are there any issues with that? Thank you so much.
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Experts, in accordance with the unified regulations, see the details in the figure below. However, due to an error, the epoxy thick-paste paint was applied directly as a primer. Since the construction is already complete, repainting would be costly. I would like to ask what problems might arise over the years if the epoxy thick-paste paint is used as a primer instead Thank you.
Epoxy thick-paste paints are generally designed to be used as intermediate or top coats, offering excellent corrosion resistance and adhesion. It is usually thicker than primer and contains more fillers, allowing it to offer better resistance to mechanical wear and chemical erosion. The primer is usually thin and serves primarily to enhance the overall adhesion of the coating, facilitating the bonding of the intermediate layer or topcoat to the surface being coated. If, due to construction errors, epoxy thick paste paint is used directly as a primer, the following problems may occur: 1. Insufficient adhesion: Primers are designed to enhance the adhesion of the coating system; using epoxy thick paste paint in their place can result in weak adhesion between the coating and the substrate it covers, making it easy for the coating to peel off. 2. Increased material consumption: Since epoxy thick-sealant paint is thicker than primer, it may require more material, thereby increasing costs. 3. Extended drying time: Thick paint coats are thicker than regular primers, so their drying time may be longer, which could affect the overall progress of the construction work. 4. Difficult to apply subsequent coats: If the primer layer is too thick, it may be difficult to apply the subsequent intermediate or top coats evenly, affecting the quality of the coating and its appearance. 5. Long-term performance impact: Due to the coating structure not meeting the design requirements, some performance issues may arise in the coming years, such as a reduced protective capacity of the coating layer and decreased durability. For work that has already been completed, if the primer is not reapplied, close attention must be paid to the condition of the coating during future use. If signs of detachment, peeling, or other early failures occur, timely maintenance or repair may be necessary. However, whether rework is ultimately necessary should still be subject to a professional assessment based on specific coating specifications, design requirements, and the actual conditions on site. .
OP, where does that requirement come from?