Polyurea for hand-painting

Research & Development

Solvent-free, high durability, room temperature curable

Polyurea for hand-painting
“Sterralock™”

Hand-paintable polyurea with long pot life, high strength, high durability, and easy handling.

Polyurea is also known as “stainless-steel like resin” or “100-year coating”. As Polyurea is known to have short pot life after mixing its monomer components due to quite rapid reaction. Thus its applications have been conventionally limited to a spray coating system. This new Polyurea has longer pot life than conventional polyurea to remain unhardened for hand-painting applications while retaining the advantages of common polyurea (high strength, high durability, and solvent-free).

Features

  • ・No special equipment for painting, no anti-scattering equipment, and no operator training is required.
  • ・It is applicable to complex shapes with thinner coating which has not been accomplished by spray coating system.
  • ・You can get both all good characterics such as higher strength, longer durability with easier handling.

2-component type

Room temperature curable

Solvent-free

Polyurea for hand-painting

Properties and comparison with other products

Items Unit
/Condition
Properties of our products*1 Competitor's products*4
Strong
type
TD-123
Normal
type
BD-085
Clear
type
CD-032

High
elongation

type
LD-060

Spray
type
Hand
Paintable
Viscosity mPa•s (25°C) Approx.
12,000
Approx.
8,000
Approx.
3,000
Approx.
6,000
- -
Pot life*2 25°C Approx.
15min
Approx.
25min
Approx.
20min
Approx.
2min
- 10-30min
Tack-free time 25°C Approx.
6h
Approx.
8h
Approx.
16h
Approx.
30min
5-10sec 4-6h
Color - Yellow Yellow Colorless Yellow - -
Tensile strength MPa 58 45 33 40 13~34 約10
Tensile elongation % 6 8 4 400 35~400 900
Surface hardness Durometer hardness D75 D65 D50 D50 A75~85
D50~70
A60
D20
Chemical
resistance*3
10% H2SO4 Good Good Good Good Good Swollen
5% CH3COOH Good Good Good Good Good Swollen
Ca(OH)2
(saturated)
Good Good Good Good Good Swollen
adhesion strength
to concrete
N/mm² >1.5 >1.5 >1.5 - - -
abrasion resistance
(abrasion loss)
Taber abrasion
1000rpm
CS-17,1kg
8-21
mg
82mg 35-170mg <1mg 35-170mg 25mg
  • *1: Not a guaranteed value
  • *2: Time required for viscosity to double. It flows even after the Pot life.
  • *3: After immersion at 60℃ for 6 days, visually observe the change in appearance.
  • *4: The values are catalog value.

Adhesion to various substrates

Example of BD-085 Adhesion strength to various s Example of BD-085 ubstrates (N/mm²)
Primer Concrete SPCC SUS304 Al PC FRP
(Epoxy)
EPS
None 3.3 2.4 1.0 1.8 1.6 2.7 Good
A(Urethane) >4 >4 >4 >4 - - -
B(Acrylic urethane) >4 >4 1.8 >4 2.7 3.0 -
C(Epoxy) >4 >4 - >4 - - -

>4: Above the upper limit of the test equipment.
-: No data

Test condition:
After applying the primer and drying for 1 to 3hours, 1mm of polyurea was applied and cured at 40°C for 24hours, after which the adhesion strength was measured using a simple adhesion tester QR-40A.
simple adhesion tester QR-40A

It adheres well to concrete, metal, FRP, etc. Adhesion can be improved with a primer. We can also recommend suitable primers.

Application examples

Closed spaces and articles that are difficult for spray application
Closed spaces and articles that are difficult for spray application
Protection and reinforcement of metals
Protection and reinforcement of metals
Protection and reinforcement of structures
Protection and reinforcement of structures
Waterproofing and anticorrosion paints
Waterproofing and anticorrosion paints

< June 01, 2023 >

Contact us