Single-group polyurethane waterproof coating construction points

China Coatings Online News Information: Polyurethane waterproof coating is a pre-polymerized body containing isocyanate based on isocyanate, polyether and other polymerization, with catalysts, waterless additives, waterless fillers, solvents, etc., processed by mixing and other processes into a single component polyurethane waterproof coating. This kind of coating is a reaction-cured type (wet curing) coating, which has the characteristics of high strength, large elongation and good water resistance.
Polyurethane waterproof coating is a pre-polymer containing isocyanate based on isocyanate, polyether and other polymerization reaction, with catalysts, waterless additives, water-free fillers, solvents, etc., processed by mixing and other processes made of a single component polyurethane waterproof coating. This type of coating is a reaction-cured type (wet-cured) coating, with high strength, large elongation, good water resistance and so on. There are the following points about its construction technology:
1. General construction order: cleaning and inspection of the grass-roots →painting the grass-roots→ detailed component node processing→ Yin and Yang corner parts of the additional layer of construction brushing→ painting the first paint→ painting the second waterproof paint→ painting surface coating → (8) paint quality inspection→ closed water test.
2. Construction points
(1) clean up and inspect the grass-roots
(2) repair the grass-roots
(3) waterproof layer detailed structure of the treatment
(1) ground leakage or the perimeter of the pipe fill sealant;
(2) outstretched flat, facade pipe, ground leakage perimeter, yin and yang corner of the part of the large surface waterproof layer should be painted before the construction of additional waterproof coating layer, waterproof coating layer thickness of 1mm.
1) The width of the additional layer around the pipe: the height of the additional layer at the pipe site is not less than 100mm, and the width of the additional layer at the waterproof base is not less than 200mm.
2) the width of the additional layer is 300mm, the width of the additional layer extending into the ground drain is not less than 100mm, and the width of the additional layer around the leak is not less than 200mm.
3) Yin and Yang angle area additional layer width of 300mm, to the junction site for the middle line 150mm each.
(3) additional layer parts are designed with mesh cloth enhancement layer, the mesh cloth should be soaked after laying, not wrinkle phenomenon.
(4) brush single-part polyurethane waterproof coating
(1) bottom coating construction: with rubber scraper paint on the grass evenly scraped, consistent thickness, paint thickness of 0.5mm;
(2) the second coating construction: after the first material is completely cured (not less than 24 hours), and then carry out the construction of the second coating, with rubber scraper paint on the base evenly scraped, the direction and the first phase vertical, paint thickness of 0.5mm; (3) The third paint construction:
after the second road material is completely cured (not less than 24 hours), and then carry out the construction of the third coating, with rubber scraper paint on the base evenly scraped, the direction and the second phase vertical, the thickness of the coating is 0.5mm; Note: Paint construction requires multiple brushes (no less than three times), direct thickness requirements.
(5) quality requirements
(1) closed water test to check the quality of the waterproof layer, paint waterproof layer can not have bubbles, layering, blocking and other phenomena