Building sealants for coated steel sheets
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Light steel structure building color coated steel joint sealant sealant. The appearance of a single component can be squeezed thick sticky fluid, with the plate close to the various color. There are seven levels of this sealant. Meet the standard requirements of the products are mainly neutral silicone sealant, polyurethane, polysulfide-type flexible sealant. Mainly used for light steel structure building color coated steel plate joints light steel structure building color coated steel roof or wall joints waterproof, anti-corrosion and weathering seal. As the steel temperature coefficient of expansion, the maximum displacement capacity requirements of products up to ± 50%; sealant with the color of the stable adhesion of the coating material, the product requires a good adhesive peel strength.
Building with silicone sealant Definition: Silicone liquid silicone rubber based sealant. Appearance: can squeeze thick viscous fluid, in case of moisture in the air curing, while the release of low molecular weight products. Product solidification precipitation of acetic acid or formic acid products for the acidic gel, precipitation of non-acidic products for the neutral plastic, such as dealcoholation type, ketone oxime type, deamine type. Acid sealant is easy to cause metal corrosion, concrete acidification, but the glass has good adhesion; Neutral sealant use a wide range, but should be noted that some of the dealcohol products after the delay in curing, or even curing phenomenon. Silicone sealant with high temperature stability, low temperature soft, good elasticity, weathering resistance, water resistance, with the glass bonding stability and other characteristics. However, silicone sealant should not be used for painting the site after painting, and should not be used to withstand tearing, abrasion and puncture may be the site, but also should pay attention to some products easy to infiltrate the oil pollution of the substrate. Products are single-component type, there are two-component type. By use is divided into concrete, aluminum and glass used in two categories. Products by displacement capacity is divided into four levels. |
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