waterproof coating
Water-based PU waterproof coating
Water-Based PU waterproof coating , Made of water-based Polyurethane dispersion as main film -forming material , Adding pigments and fillers and other additives . Curing film through water volatilization .
Product classification and specification :
PU coating
Product classification | color | Specification | Construction method |
UV / No-UV | white | 25kg/barrel | Roller,brush,spary
|
Primer
Product classification | color | specification | Construction method |
Water based Reaction type primer | A: white B:yellow | A:10kg/barrel B:1kg/barrel | Roller /brush |
Product application and features:
Water-based materials , Green and environmental friendly .
Single component , instant use and easy to apply .
Coating film has good water resistance, good corrsion resistance and Well imporosity .
Long-term UV resistance .
The PU coating film has high tensile strength , good elongation and excellent high and low temperature resistance
The coating film is compact and fee from needle holes and bubbles .
Technical date :
No |
Item | Technical date | |
1 | Soild content /% | ≥60 | |
2 | Density/(g/ml) | 报告实测值 | |
3 | Surface dry time /h | ≤4 | |
4 | Hard dry time/h | ≤12 | |
5 | Tensile strength/MPA | ≥2.0 | |
6 | Elongation at break/% | ≥500 | |
7 | Tear strength /（N/mm） | ≥15 | |
8 | Bending at low temperature /℃ | -35℃,No cracking
| |
9 | Water impermeability | 0.3MPa，120min，imporosity | |
10 | Elastic recovery/% | ≥70 | |
11 | Bonding strength /MPA
| Standard test conditions | ≥1.0 |
Wet substrate | ≥0.5 | ||
Applicable scope:
Application to waterproof of roofing、 undergroud and Metal roof .washing and totile etc waterproof project .
Working poins:
Base layer treatment -Brush primer-Detail enhancement treatment-Coating film of large area–closing treatment-inspection
Base layer treatment: the base layer should be soild and dry and does not contain mud and sand ,litters;The internal corner should be treated into smooth arc; Handle the substrate when new the roof and metal roof ;
Brush primer: Mix primer A and B as the percent 10:1 , stir thoroughly,then Mix with water as the percent 30%–50%, stir thoroughly and brush on the substrate, dosage 0.05~0.1kg/m2, dry time 10~20min, If have rest , can use in future .
Detail enhancement treatment: The deformation seam , water fall opening , protruding pipe , eaves gutter , and gutter etc part , Set up enhanced waterproof layer or perform corresponding procedures according to requirements of treatment of key and difficult points .
Coating film of large area : Can brush or spray . must be brush 2 to 3 times , During each pass of coating , should be wait 2~4 hours ,Brush the next time , Vertical construction.
Closing treament: after waterproof layer area is finished , the waterproof layer should be closed , the closing treatment should be in compliance with the requirements of treatment of key and difficult points .
Inspection: Do as the requirement of different area’rule .
Transport and storage:
1.Products of different types or specifications should be stored separately during storage and transportation.
2.Against insolation and rain , the storage temperature should be 5℃-35℃.
3.The storage period is one year .
Precautions:
1. No work is allowed to be carried out in snowy and rainy days or days with wind being 5℃ to 35℃。
2.Applicable to wet base surface: work can be carried out on the wet base surface as long as there is no visible water on the base surface , Therefore , it can be applied in rainy season . Notice : cannot work under blazing sun .
3.The ambient temperature of work shall be 5℃-35℃。
4. Before construction PU coating , Need Primer to handle the substrate .
1.0mm Dosage 2.0kg/m2-2.2kg/㎡
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