SPU Polyurethane Waterproofing Coating

SPU Polyurethane Waterproofing Coating

Introduction:

 DYC-731  SPU Overstrength Elastic Waterproofing Coating (Herein after referred to as  "SPU ") is developed and manufacturered by latest technology  introduced by DAYU from abroad.
 DYC-731  is one-component water solidified polyurethane waterproofing coating, composed  of main ingredients like isocyanates, polyethers, with some additives. It is  flexible waterproof coating by chemical reaction.
 During  construction, get the coating mixed uniformly, then brush it on the base  directly. If necessary, added no more than 10% clean water(in terms of weight)  into the coatings and blend them well by motor stirrer before coating the base.
 

Features:

• Directly construction can be applyed to  the moisture or dry substrate.

• Strong adhesive to substrate,high polymer  materials in the coatings can penetrated into the micro crack of the substrate.

• Good flexibility of the coatings,high  adaptability to the crack or expansion of substrate,excellent tensile property.

• Environmental freindly,non-toxic and odor  free,harmless to human beings.4.Good weather-resistance.Not to flow under high  temperature,no cracking under low temperature,excellent anti-aging-ability,grease-proof,abrasive-resistance,ozone-resistance, acid resistance.

• Coating film is close-grained without  cracking,pinholes,nor bubbles.small vapor permeability.It can be waterproofing  and vapor isolation function.

• Easy to construction,shorten the  construction time,maintenance convinently.

• Can be customized with different color  according to the requrements.

• Light weight,no additional weight load to  building.

Executive standard:

Consturction  method
 Construction  sequence
 Interarea  treatment—Detail node treatment construction —The first coating  construction—The second coating construction—The third coating construction—The  fourth coating construction—Node seal treatment—Thickness check—Quality  acceptance.
 Interarea  treatment
 The  interarea should be firm, smooth, solid, no sharp angles, without any dust, oil  and obvious water damage. Internal and external corner should be made circular  with cement mortar or sealant. Cracks and surface irregularities need to be  filled by sealants.
 

Interarea  Treating agent

To improve adhesion strength, we usually  brash basement agent before construction. Primary treatment agent can be  diluted with water in the site preparation coating which recommend amount of  water to 50% is appropriate. The dosage of treatment agent is about 0.3㎏/㎡.Recommended  thickness is 1.5 mm-2.0 mm. The coating should be brushed 3-4 times. After the  previous coating become dry, construct the next layer each time (usually spaced  8 hours). Each brushing direction should be perpendicular with the last  brushing.

Package&Usage:

• 1.0mm thickness:  recommend dosage is 1.2-1.5kg/m²

• 1.5mm thickness:  recommend dosage is 2.0-2.3kg/m²

• 2.0mm thickness:  recommend dosage is 2.8-3.2kg/m²

Lay glass fiber cloth or non-woven fabric among  coating layerare allowed to enhance waterproofing.
 

Application:
 Widely used in general buildings’roofs,  external walls, basements, balconies, kitchens and lavatories. Some special  buildings like granaries, civil air defence works, bridge projects.

 
Cautions
Constructing  at the temperature below 5℃ or raining are not allowed. It is inappropriate to  construct in extremely wet and non-ventilated environments.
It  should be taken measures to avoid dehydrating quickly and forming crack caused  by intense sun exposure before forming a film. It should also avoiding the loss  of rain flushing.

Storage
1) Store the product in a dry, cool  place, set and stack the barrels upside down, keep the product from sunlight  & moisture, keep storage temperature below 40℃.
2) Prevent product from strong sunlight,  rain, impact and damage during transportation.
3) Expiration date for a fully sealed and  well stored product is 12 months.