1, poor water resistance: ordinary putty has poor water resistance, so it must be removed and cleaned together with the original paint in future decoration, and then the putty is scraped. The increase of cost not only leads to the waste of resources and the increase of decoration cost, but also the garbage carved from the roots will pollute the environment. When the waterproof putty is renovated several years later, it is not necessary to scrape the putty layer, and the next process can be carried out after partial repair. Usually a good waterproof putty can guarantee the same life as the wall.
2. Cost difference: The unit price of waterproof putty is 1-2 times that of ordinary putty, but the decorative effect of waterproof putty is far beyond ordinary putty. Moreover, from the comprehensive calculation of the coating amount for secondary decoration and the cost and construction cost of putty, the cost of using waterproof putty is lower, and the unique whiteness and density of waterproof putty can save 25-30% of the coating amount compared with the wall surface using ordinary putty in terms of coating adhesion and coverage rate per unit area.
3. The difference of adhesion: waterproof putty has higher adhesion than ordinary putty. The standard bond strength of ordinary putty is greater than 0.25MPa, and there is no requirement for the strength after immersion, while the standard bond strength of waterproof putty is 0.50MPa, and the bond strength after immersion is greater than 0.30MPa. As can be seen from the standard, the strength of waterproof putty is higher than that of ordinary interior putty, and it is not easy to empty drum and fall off when using waterproof putty.
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