Waterproof Coating

BLACKTHANE 2100NT(KS) Non-tar urethane waterproofing for non·exposure

Waterproofing material for various engineering works and non-exposure parts of buildings

This paint is a room-temperature curing two-component non tar-urethane intermediate/top coat that is suitable for non-exposed waterproofing due to its excellent tensile strength, tearing strength and elongation. Due to its self-smoothing ability, it can form a seamless film and is excellent in water resistance, chemical resistance and durability. It can also form a uniform coating film. It is easy to repair even if the waterproof layer is broken. It is a non-exposed type elastic urethane waterproofing material corresponding to KS F 3211 type 2.


Paint type
Polyurethane resin (Two-Component)
Drying time
Drying time
Category 5℃ 20℃ 30℃
Set-to-touch 12 hours 7 hours 5 hours
Dry-through 48 hours 24 hours 18 hours
Over-coat (Min.) 2 days 1 days 18 hours
Over-coat (Max.) 4 days 2 days
Pot life 60 minutes 30 minutes 20 minutes
DR-700, DR-700L, DR-790
Specific gravity
Approx. 1.45 (Based on black color)
Dilution ratio
▷ No dilution
Theoretical Coverage
4.5 Kg/㎡ (Based on 3㎜)
Solid volume ratio
94±3 % (Based on black color)
Black, green, gray
Thickness of dried film
3 ㎜
Mixing ratio
Base(A)/Hardener(B)=1/4 (Weight ratio)
Flash point
Shelf life
6 months (5 ~ 35 ℃ indoor storage)
Packaging unit
25 ㎏ [Base(5 ㎏), Hardener(20 ㎏)]


Tensile strength
More than 2.0 N/㎟
Tearing strength
More than 12.8 N/㎜
Elongation rate
More than 550 %
shore A 55 ± 10

how to use

Surface treatment
1. Cure concrete for at least 28 days at a temperature of 21℃ and a relative humidity of 50%.
2. Completely remove the oil, moisture, sand, dust, laitance and other foreign matter from the surface and maintain surface smoothness.
3. For high-strength concrete (260㎏/㎠ or higher), blasting treatment should be carried out.
Coating method
1. Reinforce cracks, crevices, and joints between walls and floors with the NEW-THANSUNG SEAL(N).
2. Apply smoothly on the undercoated surface using sawtooth scraper, rubber scraper, pitchfork, roller, etc.
Appropriate construction specifications
▷Primer : BLACKTHANE 100
▷Intermediate/Top coat : BLACKTHANE 2100NT( KS )
Coating conditions
1. Atmosphere Temperature: 5~35℃, Surface Temperature: 40℃ or below, Relative Humidity: 80% or less.
2. Moisture content in the concrete: 6% or less.
During scorching heat in the summer (atmospheric temperature: 28℃ or higher; surface temperature:
40℃ or higher), please apply after 4 pm when the surface temperature drops.