双组份聚氨酯建筑密封膏 PG521。双组份聚氨酯建筑密封膏 PG521 ***
Polyurethane building sealant is a two component reaction solidification type, consisting of two components of A and B. The A component is milky white or light yellow viscous polyurethane prepolymer, and group B as curing agent and additives mixed dehydration black paste or liquid, after curing with elasticity and adhesion of the (A group: B group =10:0.8 1.2).
Base treatment: the sticky surface must be handled neatly (portable cutting machine, grinding wheel, brush, etc.), so that the surface of the coating is exposed to a solid structure layer.
The joint surface must be completely dry, clean and frost free. All dust and cement on the surface must be cleaned and treated cleanly. Rust and protective paint on the metal surface must also be removed. Such structures do not use torch drying.
双组份聚氨酯建筑密封膏 PG521 ***
Before the first coating porous surface coating primer primer. Only need to brush a thin layer, the surface is not sticky rear can be coated with sealant. (the company is supporting the various bottom paint supply).
C h a racteristic
The utility model has the advantages of good abrasion resistance, low softness, softness, wide range of performance adjustment, strong mechanical strength, good adhesive property, good elasticity, excellent resilience, and can be suitable for dynamic seams and deformation joints and expansion joints. Good weather resistance, good oil resistance, aging resistance and low price.
Polyurethane sealants also have some disadvantages. Such as: not long-term heat； light formula vulnerable to UV aging； single component storage stability by packaging and external influence, usually curing slowly； may produce bubbles and cracks under high temperature environment； many occasions need primer. At the same time, polyurethane sealant is poor in water resistance, especially alkali resistance, poor water quality.
Scope of application
The product is used in the construction of civil engineering, transportation, precast concrete and other construction materials and sealing of construction joints. Connections and seals for advanced roads, bridges, runways, underground pipes, joints, and expansion and deformation joints of tunnels and structures.
双组份聚氨酯建筑密封膏 PG521 ***