Tips on sealant quality determination
2024-05-07
Due to the excellent properties of silicone sealants, the demand for silicone sealants has increased by more than 20% per year since the 1960s. Many companies invest in the production of silicones, resulting in uneven product quality. In particular, some small enterprises, in order to pursue high profits, add cheap raw materials to the formula, making the quality of silicone sealant cannot be guaranteed. Many construction sites do not have professional testing equipment, it is difficult to judge the quality of products. The following is a small compilation that introduces you to a little trick that can judge without tools
1. Specific appearance: Apply agent glue to blank paper. After folding, smooth the glue and observe whether the glue is uniform, whether there are mechanical impurities, whether there are bubbles, etc. High-quality colloids are generally uniform and fine, without mechanical impurities.
2. Check the particles: high quality silicone sealant is a chemical synthetic material, completely stirred evenly. The texture is fine and even. After curing, the gel is smooth and glossy. The worse the quality of the silicone sealant, the more particles and impurities that can be seen. After the gel cures, the surface of the adhesive is not as smooth as the quality of the adhesive
3. Special gloss: The gloss of different quality glue after beating is different. No matter what color of high-quality glue cure, gloss is strong. Some low-quality glues will lose their luster as soon as they come out, and others will lose their luster after a month or two of curing.
4. Look at the bubbles: The main component of high-quality silicone sealant is silicone. The amount of other added materials is very small. The good stability of pure silicone resin is least affected by changes in external conditions during storage. Air mixes into the air, creating a "toot" or "toot" bubble. However, due to its glue, ordinary quality silicone rubber is not 100% silicone resin. The additives in the silicone and the PE soft rubber in the rubber bottle may cause a chemical reaction that causes the rubber bottle to expand and increase, and the air left in the space permeates into the glue. Cause it to create gaps, and when it is glued, it will emit "beep beep" bubbles, which will shorten the shelf life. What's more, some manufacturers deliberately place the bottom cap on the bottom of the bottle when installing glue, and the air is left in the middle of the bottle, so that the amount of glue will be greatly reduced, which is inevitable. Naturally occurring glue has bubbles.
