Whether the glue has formaldehyde is described in detail below. Wallpaper glue starch glue: glue made by mixing starch and viscose. Starch itself does not contain formaldehyde, and generally 0.5%-3% formaldehyde is added as raw material. Glutinous rice glue: Also known as Dali Glue and Japanese Glue, it is an environmentally friendly glue made of natural raw materials through 12 processes, and it has good viscosity and is very popular. Compared with other glues, it is more environmentally friendly. Barreled plastic: Compared with the above two products, the price is more expensive, but the quality, environmental protection and viscosity are reliable. Most of the products on the market are imported. Pay attention to the certificate of origin, customs declaration, environmental inspection marks (EU certification, ten ring certification) and Chinese marks during the purchase process.

White latex for woodworking glue: not only strong viscosity, but also good toughness, non-toxic and tasteless, and easy to use. However, when used at low temperature, it is sticky and easy to freeze, so it is generally applicable. Avoid choosing products with uneven colloid, layered precipitation or pungent smell when purchasing. It's a pity that fake goods are rampant in the market now, and no less white latex is harmful to human body. Flooring glue: it bonds the floor into a whole, which has the function of moisture-proof and waterproof. Short setting time, high viscosity and long service life, but compared with keel laying method and suspension laying method, the pollution is greater. 309 glue: also known as universal glue, it has no elasticity and is not easy to open. It is suitable for wood, metal and plastic panels. The solvent of all-purpose adhesive generally contains a lot of benzene, so it is better to use it less.

Glass glue can be divided into three properties: neutral, acidic and aqueous. Acidic glass glue has strong adhesion, but it is corrosive to some materials, so its applicability is limited and its pungent smell is also great. Neutral adhesion is relatively weak, the taste is small, it is widely used, and water-based glass glue is rarely used. Stone glue

The most commonly used is marble glue (marble glue), which is cheap, short in setting time and relatively environmentally friendly, but has great elasticity and poor weather resistance. In addition, the curing of AB glue is slow, but the elasticity after curing is small and relatively stronger. PVC special adhesive

It is used to bond PVC pipes and fittings, especially in electrical buildings. Inelasticity, large expansion and excellent waterproof performance. It is recommended to choose environmentally friendly rubber compound, which may be more expensive. In addition, 108 glue can be used to increase the strength when brushing putty. In short, when choosing any kind of glue, you should choose carefully. It is difficult to guarantee real environmental protection with home improvement glue. It is also difficult to buy formaldehyde-free glue in the market, because formaldehyde is an industrial raw material and widely used in building materials. You don't know whether the glue you bought or the glue used for materials is completely nontoxic and tasteless, so come to a professional in addition to formaldehyde company for testing.

I hope this reply can help you!