A sealant is a substance used to stop fluids from passing through a seam or opening in a surface or material and is a type of mechanical seal. In building construction, sealants are sometimes synonymous with caulking and are also used to block the transfer of dust, sound and heat. Sealants can be weak or strong, flexible or rigid or temporary. Sealants are not adhesives, but some have adhesive properties and are called adhesive sealants or structural sealants.
A caulk sealant has three basic functions: it fills the gaps between two or more substrates; it forms a barrier through the physical properties of the sealant itself and its adhesion to the substrates. And it maintains hermetic properties over the life expectancy, usage conditions and environment. Sealants perform these functions through the correct formulation to achieve specific application and performance characteristics. However, aside from adhesives, there are few other functions that can replace the sealing process.
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Although not very strong, sealants have many properties. They seal the top structure to the substrate and are particularly effective during waterproofing by keeping moisture out of (or in) the components that use them. They provide thermal and acoustic insulation and can be used as a fire barrier. They may also have electrical properties. Sealant can also be used for simple smoothing or filling. They are usually required to perform several of these functions at a time.
July 31 Lecong Steel Market Price Quotes
Product Name Specification Material Steel/Origin Price (yuan/ton) Than yesterday Last week Hot Roll 2.75mm*1250*C Q235 Handan Steel 6350 -30 -30 50 Hot Roll 3.0mm*1500*C Q235 Tang Steel 6230 -20 -20 130 Hot rolled coil 3.0mm*1250*C Q235 Angang 6230 -20 -20 80 Hot rolled coil 3.5mm*1250*C Q235 Angang 6130 0 0 80 Hot rolled coil 2.0mm*1250*C ZJ400 Beads Steel 6500 0 0 0 Hot rolled coil 3.2mm*1250*C ZJ400 Bead steel 6150 0 0 50 Hot rolled coil 5.75*1500*C Q235 Tangsteel 5860 -20 -70 10 Hot rolled coil 5.75*1500*C Q235 Handan Steel 5860 -20 -70 10 Hot rolled coil 5.75*1500*C Q235 Benxi Steel 5850 0 -80 0 Cold rolled sheet 1.0mm*1000*2000 Q195 Angang 7100 0 -50 -120 Cold rolled sheet 1.0mm*1250*2500 Q195 Angang 7050 0 -70 -120 Cold rolled sheet 2.0mm*1250*2500 Q195 Angang 7050 0 -100 -120 Cold rolled sheet 3.0mm*1250*2500 Q195 Ansteel 7850 0 -50 -150 Cold rolled sheet 1.0mm*1250*Cmm Q195 Horse Steel 6900 0 -100 -170 Cold rolled coil 1.0mm*1250*Cmm Q195 Steel cladding 6900 0 -80 -150 Cold rolled coil 1.0mm*1250*Cmm Q195 Handan Steel 6900 0 -80 -150 Medium plate 6mm Q235 New Steel 7100 0 0 -50 Puzhong Plate 8mm Q235 New Steel 7050 0 0 -50 Puzhong Plate 10mm Q235 New Steel 6750 0 0 -50 Puzhong Plate 14-20mm Q235 New Steel 6650 0 0 -50 Puzhong Plate 10mm Q345 Handan Steel 6750 0 0 -50 Puzhong Plate 12mm Q345 Handan Steel 6650 0 0 -50 Puzhong Plate 16-25mm Q345 Handan Steel 6600 0 0 -50 Strip 154mm*2.5 Q195 Guofeng 5520 0 -260 -260 Strip 235mm*2.5 Q195 Ruifeng 5640 0 -50 -140 Strip 178mm*2.3 Q195 Guofeng 5640 0 -50 -140 Strip 232mm*2.5 Q195 Jianlong 5640 0 -50 - 140 I-beam 16# Q235 A-steel 5650 0 -550 -550 I-beam 25# Q235 Angang 5770 0 -50 -50 Channel Steel 16# Q235 Liusteel 5700 0 -70 -70 Channel Steel 28# Q235 Ansteel 5450 0 0 0 Angle Steel 40*4mm Q235/Shougang 5760 0 0 0 Angle Steel 50*5mm Q235 Nanchang 5680 0 -90 -90 Color Coil 0.426*1000*C CGCC Huaguan 8700 0 -80 -950 Color Coil 0.426*1000*C SGCC Shunpu 5680 0 -3000 -3970 Color coated coil 0.476*1000*C SGCC Shunpu 8600 0 -100 -950 Galvanized coil 0.5*1000*C SGCC Pangang 7900 0 -100 0 Galvanized coil 0.6*1000*C SGCC Benxi Steel 7680 0 -70 -70 Galvanized coil 0.7mm*1000*C SGCC Angang 7580 0 -100 -100 Galvanized coil 1.0mm*1000*C SGCC Angang 7430 0 -70 -70