Poly Urethane

Waterproofing & Flooring

July 25, 2018 JTCC. JT Construction Chemicals 1 1

Content

❑ Introduction of polyurethane

❑ Polyurethane waterproofing

❑ Application

❑ Trouble shooting

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Overview of the urethane

POLYURETHANE ?
All polymer compounds formed by the urethane bond.
OH alcohol group and an isocyanate group NCO combined to produce a urethane bond

-OH + -NCO -N-C-O-

H O
Resin Hardener Solvent Cross-linking reaction of the resin and
evaporation of the solvent is in progress

After a certain period of time

being a cross-linking reaction is
completed,

Wet film The reaction temperature drying The dried film

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 Product
Mixing
Product Product ratio Characteristics Reference
(R:H)

A one-pack type moisture-curing to penetrate deep into the

1-
concrete material undercoating to enhance the strength and Transparen
Urethane Primer Nitoproof Primer compo
form a strong adhesion between the material and the coating cy
nent
film

2-component polyurethane top coat waterproofing paint finish

Urethane
Nitoproof TOP COAT 1:3 with excellent abrasion resistance and UV light resistant Thin Film
Topcoat
pigment on

Urethane resin and water resistance, chemical resistance of

Tar-urethane Thick
PU2K C TAR UTRETHAN 1:3 unfilled 2-component elastic waterproofing manufactured from
waterproofing Film
coal tar outstanding

Tensile strength, tear strength, high elongation and excellent

Urethane Semi
Nitoproof PU2K 1:3 elastic and flexible forms a strong waterproof coating adhesion
waterproofing Hard
and waterproof elastic roof waterproofing

1- As the moisture-curing one-component polyurethane sealants

Urethane Moisture
Nitoproof PU1K compo prevent it represents an excellent waterproof effect let that
waterproofing curing
nent may occur in the mixing step

Durability, excellent elongation, etc. can be used as flooring

Urethane hard elastic flooring 1 : 2 and other indoor and outdoor track and field stadium, general Hard
buildings
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Properties
product
Neothane Urethane hard
NeoThane Primer Neothane topcoat Neothane #200 Neo easythane
TAR UTRETHAN elastic flooring
Item

Mixing ratio
One pack 1:3 1:3 1:3 One pack 1:2
(B:H)

Specific gravity 0.95±0.05 1.15±0.1 1.4±0.1 1.5±0.1 1.45±0.1 1.4±0.1

Touch dry
1 hours 1 hours 12 hours 7 hours 8 hours 5 hours
(25℃)

Pot life
3 hours 2 hours 30 min 30 min 30 min 30 min
(25℃)

24 hours
Drying time (25℃) 24 hours 24 hours 48 hours 24 hours 72 hours

Elongation
- - 550 over 450 over 450 over 300±100
(%)

Hardness
- - 50±5 60±5 - 80±5
(Shore- A)

Thinner usage
Less than 5 Less than 5 - - Less than 5 -
(%)

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 Application
Unexposed polyurethane waterproofing SYSTEM
Indoor and outdoor waterproof roof Unexposed
- Remove laitance
Of Building Structures baths, sauna, balcony, etc.
Floor cleanup - Check water content
- Reinforcing fragile zone

Construction sectional
- urethane primer: 0.2-0.4㎏/㎡
Primer - Corner area and around the
pipe reinforcement
Use polyurethane sealant

Protection Mortar - Unexposed urethane

Urethane 1st
Unexposed urethane(3㎜) moderate : 1.5 ㎜
Application
- Reinforcing health checks
Urethane primer and fragile zone
Concrete
- Unexposed urethane
Urethane 2nd
moderate : 1.5 ㎜
Application
- Reinforcing health checks
and fragile zone

- (Wall) tiles attached upon

Protection Mortar silica spray
Protection Mortar
(waterproof layer damaged
during follow-up care)

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 Application
Exposure polyurethane waterproofing /Flooring SYSTEM
Common roof and interior and exterior, concrete
- Remove laitance
waterproofing
Floor cleanup - Check water content
- Reinforcing fragile zone

Construction sectional
- urethane primer: 0.2-0.4㎏/㎡
Primer - Corner area and around the
pipe reinforcement
Use polyurethane sealant
Finishing top coat
Exposure urethane(3㎜) - Exposure urethane
Urethane 1st
moderate : 1~1.5 ㎜
Urethane primer Application
- Reinforcing health checks
Concrete and fragile zone

- exposure urethane
Urethane 2nd moderate : 1~1.5 ㎜
Application -Reinforcing health checks
and fragile zone

- urethane top coat:0.3-0.4㎏/㎡

Top coat Roller, spraying
- Uniformly coat

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 Application
Sports Facilities hard urethane paint SYSTEM
It requires resolution elastic bottom layer middle, top paint - Remove laitance
Basketball, tennis courts, table tennis, etc. Floor cleanup - Check water content
- Reinforcing fragile zone

Construction sectional - Primer: 0.2-0.4㎏/㎡

Primer - Reinforce corner area using
polyurethane sealant

Top coat
Hard urethane(2㎜) Urethane 1st - Apply body coat (hard): 3.0㎜
Application - Check and reinforce 1st layer
Semihard urethane(3㎜)
Urethane primer
Concrete - Apply 2nd body coat (hard): 2.0㎜
Urethane 2nd
Application - Check and reinforce

- Apply top coat:0.3-0.4㎏/㎡

Top coat using Roller, or Spraying

Line marking

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Application (Step 1)

Substrate Preparation Priming(Neothane Primer)

Repair Crack & damage Corner sealing(Urethane sealant)

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Application (Step 2)
Body Coat (Neoeasythane, Neothane #200)

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Application (Step 3)
TopCoat(Neothane#500), Green/Grey

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Trouble shooting
Polyurethane waterproof flooring construction defect causes and countermeasures

Problem Causes Measures

High temperatures (direct sunlight), the CO2 gas

High heated waves (air: over 30 ℃, surface work:
generated by rapid curing reaction did not get out to
more than 40 ℃) work zone should be avoided.
outside

After application completely dry work surface

Swelling caused by water vapor pressure while the
(concrete curing more than 28 days after the seal
surface changes into steam after application
check moisture content of 8% or less)

Film Swelling
(Bubble, Should be applied twice body coat
Pinhole) Thick middle coat in direct sunlight Primary scraping (0.5 ~ 1 ㎜) after the second
coating

The formation of a thick coating (over 5㎜) , CO2 Gas

One coat middle coat within the 3㎜
cannot get out

A primer coating to at least twice

Excessive porosity of the surface (bubbles, pinholes),
Middle coat coating after scraping a part of the
Not enough priming
middle coat

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Trouble shooting
Polyurethane waterproof flooring construction defect causes and countermeasures

Problem Causes Measures

After the primer or middle coat coating in a

Primer again using 10~25% diluted product
state exposed to rain (interlayer adhesion
(0.1 ㎏ / ㎡)
failure)

Swelling caused by water vapor pressure while Should be applied at the dry condition
the work surface changes into steam after (concrete curing more than 28 days after the
Attaching application seal check moisture content of 8% or less)
defect
Preprocessing conduct of the work surface
Pretreatment of poor working surface (painted
(removing cement, mortar dust, laitance,
in the state in which the surface contamination)
dirt, etc. to clean the grinder)
Repainting interval (within 48 hours)
Recoating intervals in excess(48hrs) Primer 10-20% dilution thin coating using a
diluent (0.1 ㎏ / ㎡)

A : Penetration to the work surface by the strength

increasing effect

B : Improve the adhesion of the base surface, it prevents

air bubbles.

C : Liquidity prevent the reduction of floor Repair.

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Trouble shooting
Polyurethane waterproof flooring construction defect causes and countermeasures

Problem Causes Measures

Uniformly stirring the resin and hardener using

Mixing and stirring mistake
power tools

Mixing ratio compliance, using completely scraped

It does not fit the blending ratio of resin and hardener
some of the precipitation hardening agent

Remove the hardener (mixing, stirring when using

Hardener is located on the floor
a pallet)
Remove moisture and complete cure of the work
If the moisture seep out from the work surface
surface
Curing
Excessive dilution of diluent Amount used of diluent compliance

The use of diluent dedicated

The use of unsuitable thinner
(Alcohol, lacquer thinner, epoxy thinner Do not use)

When coating at a low temperature (below 5℃) Working Temperature Compliance (more than 5 ℃)

A high temperature (over 30 ℃), humidity (over 85%) Working in hot and humid environment (the rainy
in a working environment season) should be avoided

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Trouble shooting
Polyurethane waterproof flooring construction defect causes and countermeasures

Problem Causes Measures

If you have a large bubbles are generated in the resin

Mixing ratio compliance
is excessive and cracks after curing

Excessive dilution of diluent Comply with the prescribed amount of diluent.

Excess coating film formed on one (or more 5㎜) Construction as per proper film thickness

After sealing the cracks of the work surface

Cracks in
Crack the impact of the work surface pretreatment agent after the V-Cutting middle coat
the coating
painting

Applied to the portion of the work surface cracks

Uniformly forming an middle coat coating film to
middle coat a thin coat
within 3㎜
(Within about 1㎜)

Cracks caused by external forces such as vibration of After you complete the installation process, such as
the building before full cure of the middle coat joint

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Trouble shooting
Polyurethane waterproof flooring construction defect causes and countermeasures

Problem Causes Measures

middle coat curing defects and occurs when fully middle coat coating method and then comply fully
cured before the topcoat paint cured topcoat paint

Topcoat paint in poor adhesion occurs when the state

Top coat middle coat coating method complies
of the middle paint
Paint
wrinkles
When the middle coat coating thickness as low as less Working with the middle coat coating thickness
than 1㎜ occurs when top coat paint regulation

middle coat the surface of the topcoat paint in oil or

Before topcoat ensure cleanliness and removal
contamination by foreign substances

When topcoat paint in the middle coat surface

Before topcoat ensure cleanliness and removal
contamination by oil or debris cratering phenomenon
Topcoat
coating
defects If there is a possibility of rain, prohibited operation,
The discoloration of the color occurs when exposed to
(If a larger temperature difference between day
moisture such as rain before fully cured topcoat
and night dew note)

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Trouble shooting
Polyurethane coating waterproof flooring construction defect cases

➢ Topcoat coating defects

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➢ Before Curing, Contact rain or water 17 17
Trouble shooting
Polyurethane coating waterproof flooring construction defect cases

➢ Above 8% water content on the surface> ➢ Apply top coating before set bodycoat>

➢ Overdosage thinner> ➢ Over dosage thinner>

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Trouble shooting
Polyurethane coating waterproof flooring construction defect cases

➢ Coating swells rising phenomenon caused by

water after painting

➢ Apply topcoat on the uncured state

➢ Thickened by using the excess paint

thinners

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Trouble shooting
Polyurethane coating waterproof flooring construction defect cases

Summer temperatures (direct sunlight) job

Foam reacts with the moisture content when there
are many topics

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Comparison of resin Product

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Reference

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Reference

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Reference

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Reference

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