Polysulfide sealant @ åŒ component polysulfide sealant @ åŒ component polyurethane sealant
The difference between polyurethane sealant and polysulfide sealant
Two-component polyurethane sealant and polysulfide sealant products are two commonly used road sealant sealant products, but these two products have many differences in many performances
1. The two products are very different in elongation at break and displacement capacity. The elongation at break of polyurethane sealing materials is 700-1000%, and the displacement capacity is 200-400%, while the elongation at break and displacement capacity of polysulfide sealant products are much worse than polyurethane sealing materials, so polysulfide sealants The performance of highway caulking is not as good as polyurethane sealing material. (13785855258 paid)
2. The two-component polyurethane sealant product has good wear resistance, puncture resistance, and tear resistance. These excellent performance properties make this product very suitable for use in highway grouting, and polysulfide sealant The abrasion resistance and tear resistance of the product are very general. In comparison, the polyurethane sealing material is more suitable for use in highway grouting.
3. The two products also have great differences in environmental performance. Polysulfide sealant products have a certain smell after curing, which has a certain pollution to the environment, and polyurethane sealing materials are different. It is an environmentally friendly material certified by the state. It will not pollute the environment after use.
4. The two products are also very different in the surface drying time. The vulcanization of polysulfide sealant depends greatly on the ambient temperature, and the surface drying of polyurethane sealing materials is generally 1 to 3 hours. ,can be completed. Therefore, the use of polyurethane sealing materials saves more time.
Remarkable characteristics of the two types of sealants The curing type is the same as the one-component polyurethane sealant. The curing type mainly relies on moisture to cure the two-component polyurethane sealant.
Both sealants are used for civil construction transportation (highway bridges, runways and pipelines) caulking seals. One-component sealant and two-component sealant are the same as one-component sealant for vehicle and vehicle windshield installation
The two products have almost the same product characteristics: excellent wear resistance, low temperature flexibility, wide adjustment range, mechanical strength, adhesive elasticity, excellent recovery, suitable seam deformation joints, expansion joints, weather resistance, oil resistance, excellent physical resistance, and price. low
The single-group main phase and two-group language use of the two-group polyurethane adhesive requires the A and B groups to be evenly mixed according to the share to achieve the bonding and sealing effect; the single group is easy to use directly, simple and concise construction
Moisture curing refers to the use of a single group of polyurethane adhesive to cure the trace water vapor in the air and the surface group of the substrate to achieve the bonding effect
One-component polyurethane sealant operation will ensure good adhesion quality
The polysulfide sealant and polyurethane sealant used in our home are all from Hengshui Yifeng, and the quality is good. Hope to adopt. . .
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