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    Home > Coatings News > Paints and Coatings Market > What is the difference between flexible putty and water-resistant putty? How to properly construct without errors?

    What is the difference between flexible putty and water-resistant putty? How to properly construct without errors?

    • Last Update: 2020-12-31
    • Source: Internet
    • Author: User
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    Flexible putty is made of high-quality cement, fillers, synthetic polymers and selected additives, according to the flexibility and waterproof performance of putty, divided into ordinary external wall putty, flexible anti-crack putty, flexible external wall putty and waterproof external wall putty.
    water-resistant putty is a kind of building putty, especially can reach the "building indoor putty" (JG/T298-2010) standard in the N-type, that is, water-resistant putty standard of a class of putty. Water-resistant putty normal scraping on the wall, its service life should be more than 15 years, and the general type of non-water-resistant putty in the outer layer with latex paint protection can only reach about 5 years

    .
    Flexible putty features
    01 water resistance
    external wall insulation system in the natural environment, often due to water action and destruction, putty in the outer wall insulation system surface layer, putty layer outside only a thin layer of paint, external wall insulation system in practice Often by the outside world's destructive force, such as impact, slugs, etc. , paint surface is easy to be destroyed, so that putty layer exposed in the natural environment, when encountering rain and snow and temperature suddenly rise and fall and other weather, putty layer will be washed by rain, repeated freezing and melting damage caused by skin, shedding, cracking and other problems. Therefore, the external wall insulation system in order to resist the damage of water, requires putty layer has good water resistance, can prevent outside water into the putty layer soft, fall off, thus maintaining the stability of the system, and flexible putty has a very good water resistance.
    02 Flexible
    external wall insulation system for a long time to withstand sharp temperature difference changes, the thermal stress is considerable, this thermal stress is mainly manifested in the surface layer. Because the insulation performance of the insulation layer is particularly good, its surface temperature in summer can be as high as 80 degrees C, the summer after the continuous sunny days of sudden rainstorm caused by the surface temperature changes can reach as much as 50 degrees C, the summer high temperature will accelerate the aging of the surface layer, so the insulation surface layer is prone to cracks. Through theoretical research and practical application summary, "rigid waterproofing technology route" is the main cause of thermal insulation surface cracks, under the influence of this technical route, the material used for pre-stress, high strength, high elastic mould, did not leave the way out of thermal stress full release.
    water-resistant putty features
    01 good feel
    water-resistant putty after construction surface smooth and delicate, after light treatment putty will give people a slippery feel, with decorative effect can be used as decorative layer.
    02 durability is good
    ordinary putty due to poor water resistance, later decoration must be along with the original paint to eliminate clean, and then scrape putty. Not only increase the cost of waste of resources, decoration costs (material costs, labor costs) increase, the removal of waste, difficult to recycle, will cause pollution to the environment. Water-resistant putty once and for all, after several years of second, third or more decoration, no longer have to shovel down the putty layer, polish the surface, local repair can be the next process, etc. , saving time and effort and protect the wall. Usually good water-resistant putty ensures the same life with the wall.
    03 High bonding
    JG/T298-2010 "Indoor putty" standard for putty strength has been clearly defined, the standard state bonding strength of ordinary putty is greater than 0.25MPa, there is no requirement for the strength after immersion, and water-resistant putty requires the standard state bonding strength of 0.50MPa, after immersion bonding strength is greater than 0.30MPa. Through the standard can be seen that the strength of water-resistant putty is higher than ordinary inner wall putty, so the use of water-resistant putty is not easy to produce empty drums, shedding.
    flexible putty construction method:
    1, treatment: first clean the substrate, require clean and smooth.
    2, add dry powder and water to the container, stir well with special tools, set aside for 5 minutes, and then stir again, putty dry powder plus water for 30%.
    the order of feeding: first add water and then feed.
    the scrape of putty: scraping is a method of scraping putty with a wipe, scraper or greas knife.
    3, scraping putty is solid, flat, light. That is, putty and grass contact close, firm bonding, smooth surface smooth, to reduce the amount of polishing work. When the grass-roots absorption is strong, the bottom coating should be closed before scraping the putty, so as not to be too much water and glue in the putty by the grass-roots absorption, affecting the adhesion of putty.
    4, good scraping tool tilt, force uniform, to ensure that the putty is full. In order to avoid putty shrinkage is too large, cracking and falling off, a batch scrape should not be too thick, according to the characteristics of different putty, thickness of 0.5 to 1.0mm is appropriate.
    5, putty polishing: grinding refers to the grinding process of the coated surface with abrasive material. It has a great influence on the smoothness, attachment and grass angle and line of the coating. In order to achieve the desired effect of grinding, the appropriate grinding methods and tools must be selected according to the quality requirements of different processes. Grinding must be done after the base or putty has dried, so as not to affect the operation of the adhesive sandpaper.
    water-resistant putty construction method
    1, construction as far as possible do not leave scratches, if there are scratches can be used tools to scrape down can be eliminated.
    2, putty layer 90% dry when arranged for grinding treatment, when both labor-saving and do not adhere to sandpaper.
    3, after grinding to immediately remove the surface of the gray layer, to prevent secondary indoor dust pollution.
    4, hand-polishing should be sandpaper (cloth) wrapped in the sanding pad, back and forth force to push the pad fast, can not only use one or two fingers pressed sandpaper sanding, so as not to affect the smoothness of grinding. Mechanical grinding commonly used electric grinding machine, sandpaper clamped on the grinding machine, gently push on the grass, strictly prohibited to press hard to avoid damage to motor overload.
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