The standard for water-resistant putty, "Jupiter for Building Interior" (JG/T298-2010), was introduced in 1998. However, the company had already been producing water-resistant putty before the standard was established. The formula was first tested by Professor Shi Yumei from the Institute of Building Science. At that time, most regions, including Beijing, still used general waterproof putty or even substandard products that failed to meet the JG/T298-2010 requirements. These non-water-resistant putties posed serious risks, such as short service life, easy hollowing, peeling, and cracking, which could lead to major issues in interior decoration.
As the birthplace of construction putty, Beijing has seen the most formal and rapid development of putty products in the country. In October 2001, three years after the standard was set, the Beijing Municipal Construction Committee and Planning Committee issued Document No. 192 of the Beijing Building Materials [2001], which targeted the third batch of outdated building materials. It restricted the use of “water-resistant gypsum-type wall putty†and encouraged the use of “various water-resistant putty.†From then on, all new construction projects in Beijing were required to use water-resistant putty for leveling, or the project would not be approved.
Construction putty comes in two common forms: powder and paste, and water-resistant putty is no different. The powder form typically includes calcium carbonate, ash calcium powder, cement, organic rubber powder, ultra-fine fillers, and water-retaining agents. Most modern products now exclude cement and organic rubber, leading to higher bonding strength and better water resistance. However, many manufacturers still skip adding organic rubber, resulting in poor water resistance and lower strength, making walls more prone to moisture absorption.
The paste version mainly consists of high-molecular organic materials, ash-calcium powder, ultra-fine fillers, and water-retaining agents. This type of putty is white, has strong adhesion, good water resistance, and is a rigid, alkaline product. It’s often preferred for its smooth finish and durability.
According to the "Building Interior Putty" (JG/T298-2010) standard, indoor putties can be divided into three categories. The worst is "pseudo-pure putty," which doesn’t meet the standard. These are usually made by mixing raw materials like ore powder and glue on-site, leading to easy cracking, peeling, and a very short lifespan. Examples include "scratch white" in northern China and "old powder" in Jiangsu and Zhejiang. The second category is standard-compliant putty, which is slightly improved but still prone to peeling and cracking, with a limited lifespan. The 821-type putty is a typical example. The best option is water-resistant putty, which offers strong adhesion, resists peeling and cracking, and lasts much longer—so you won’t need to scrape it off during the next renovation.
Blinds Glass,Fabric Vertical Blinds,Vertical Blinds Fabric,Blind Shutter Glass
Huaian Hongrui Glass Co.,Ltd , https://www.hongruiglass.com