Introduction:
      DH-811 is a polyurea elastomer material composed of isocyanate semi-prepolymer, amine chain extender, polyether, pigment and additives. It is  a new type of "green and environmentally friendly" spraying technology that adopts new equipment and new process to spray on the spot. It is one of the most advanced spraying technologies in the world at present.

Purpose:
      DH-811 anti-corrosion materials are mainly used for anti-corrosion and waterproof of concrete storage tanks and affiliated facilities in various industries.For example sewage treatment tank, drainage trench, acid washing tank, electroplating tank, neutralization tank, evaporation tank, petroleum, chemical industry and oil field.

Performance indicators:

Solid content	100%
Gel time	10 seconds
Tensile strength	16MPa
Tear strength	65KN/m
Elongation at break	300%
Hardness, Shore A	75 ~ 95
Adhesion, MPa(pull out method)	≥6
Acid and alkali resistant medium	good
Density,g/cm3	1.02
Recommended thickness	2 ~ 3mm

Substrate processing:
      The concrete substrate should be removed the cement floating slurry, and loosed impurities on the substrate, The substrate should be clean before construction, avoid oil and impurities, avoid water on the substrate, repair cavity defects, and brush concrete special sealing primer.


The coating method:
      High temperature and high pressure spraying equipment specially used for polyurea are used for substrate.


Supporting materials:
      DH-XN repair putty was used to repair the holes and defects on the concrete substrate.
      Apply a special concrete seal primer DH-DQ003 to the substrate.
      During multi-pass spraying, if the interval between each passes is so long that it can exceed 3 hours, the surface needs to be polished, and then DH-DQ001 layer adhesives are applied.
      If the polyurea material is damaged, manual repair material DH-X200 can be used.