One. Does ready-mixed grout contain formaldehyde?
The main components of grout sealant are epoxy resin, hardener, and pigments, which inevitably contain some formaldehyde. Generally, grout sealant produced by regular manufacturers contains formaldehyde within the specified range, so it can be used with confidence. However, some unscrupulous businesses use substandard materials to produce grout sealant, resulting in exceeding the formaldehyde content. When purchasing, it is crucial to pay close attention.
II. How to determine whether the joint sealant contains formaldehyde.
1、When selecting joint sealant, it is necessary to conduct a formaldehyde detection by a professional agency to determine if it contains formaldehyde.
2. Formaldehyde testing should be conducted by institutions that meet national or provincial measurement certification standards. only third-party testing organizations that have obtained a measurement certification certificate are allowed to use laboratories that meet national standards. These organizations are authorized to use the "CMA" (Chinese Measurement Certification) endorsement on testing reports, and only reports with this endorsement have legal validity.
Three. How long does the smell of the grout need to dissipate?
Generally, once good indoor ventilation is ensured, the formaldehyde released from the grout will dissipate within a month, allowing for occupancy. For newly renovated homes, it is best to wait 2-3 months after ventilation before moving in, especially if you are not in a hurry. The rate of formaldehyde release is related to temperature; for every 1 degree Celsius increase in indoor temperature, the volatility of formaldehyde increases by 0.4 times. Therefore, to quickly release formaldehyde, first increase the indoor temperature, and then open the windows for ventilation.