SPU-311Two Components Polyurethane Waterproof
Coating DescriptionSPU-311 is a synthetic polymer
waterproof coating by two components reaction. Component A is a
polyurethane prepolymer through the reaction between polyether
polyol and isocyanate. Component B is a colorful liquid consisting
of plasticizers, curing agents, thickeners, coagulants and
fillers. Where to use Undergrounds, cold stores and
grade;Bathroom, kitchen and pools;Hard to dry substrate of
underground construction;Subways, channels, bridges, tunnels and
unexposed roofs; Advantages Can be applied on the wet
underground substrate with strong bonding power;Multipurpose to
apply on horizontal planes, vertical planes and top
planes;Seamless, no pinholes and bubbles;Liquid with cold
applied;Fast solidify and convenient to apply. StandardsASTM C
836 PackagingComponent A and B of SPU-311 are sealed in 8kg
and 20kg pails, respectively, transported in wooden cases. Each
wooden case can be contained 48 pails of component A or 36 pails of
component B. StorageSPU-311 materialshouldbestored
by sealed pails at dry and well-ventilated places and protected
from sun or rain. The temperature in stored places can not be
higher than 40° C. It can not be closed to fire sources. The normal
shelf life is 12 months. TransportationSPU-311 is needed to be
avoided sunshine and rain. Fire sources are forbidden during
transportation. Application System Constructive SystemThe
system is basically consisted of substrate, additional layer,
waterproof coated membrane and protection layer. Coverage1.7kg
per m2 gives dft 1mm minimum. Coverage may vary with the substrate
condition during application. MixingThe ratio of
component A to B is 1:2.5 according to the construction
amount. Application MethodSurface preparationSurfaces
should be dry, stable, clean, smooth, without pockmarks or
honeycombs and free from any dusts, oil or loose particles. Cracks
and surface irregularities need to be filled by sealants and do
additional waterproofing. For smooth and stable surfaces, this step
can be skipped. Additional layerPaint SPU-311 as additional
layer to enhance at internal and external corners, drain pipes,
floor drains or embedded parts. Application of waterproof
coated membraneIt can use rubber scrapers or spray equipments to
paint 2 or 3 times. After fully dry, it can be painted again. The
normal time between each painting is 24 hour. The direction of
second time painting needs to be perpendicular to the first time
painting. Application of protection layerAfter waterproof
coated membrane is fully dry and meets quality requirements, it can
begin application of protection layer. Notice The
temperature for application of SPU-311 should be above 5ºC.SPU-311
has to be used out as soon as possible and no more than 20 minutes
once opened. It can not be exposed to the air for a long time.The
storage and application places should be well-ventilated and no
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