BW3-900 spray pure polyurea elastomer
anticorrosion waterproof protective coating

 Bw900 is a 100% solids aromatic pure polyurea elastomer, endowed with outstanding waterproof, anti-corrosion and wear-resistant performance. It has been widely applied in industrial and commercial fields for professional anti-corrosion and waterproof protection of various substrates and structures.

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Tensile strength
0 Mpa
Solid content
0 %
Elongation rate
0 %
Impermeability
0 Mpa/2h

Product features and advantages

  • Solvent free, 100% solids, safe, environmentally friendly and odor free.
  • Rapid cure, can be sprayed on bent, slope and vertical surfaces without sagging.
  • Dense coating, seamless, with good flexibility.
  • High adhesive strength, bonding well on steel, concrete, wood, glass fiber and other substrates.
  • Excellent impact resistance and abrasion resistance.
  • Excellent anticorrosion and chemical resistance to acids, alkali and salts.
  • Excellent waterproof performance.
  • Good shock-absorbing performance.
  • Excellent resistance to temperature variation.
  • Fast cure, allowing the application site to return to service quickly.
  • Excellent durability that helps reduce long-term maintenance costs.
  • Extends the service life of the protected structure.

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Technical Specifications

BW3-900

Products information

Item Part A Part B
Appearance Pale yellow liquid Adjustable color
Specific gravity (g/cm³) 1.12 1.05
Viscosity（cps）@25℃ 800 650
Solid content （%） 100 100
Mix ratio（by volume） 1 1
Gel time (second）@25℃ 4-6
Theoretical coverage (dft) 1.08kg/㎡ film thickness:1mm

Physical properties

Item Test standard Result
Hardness (Shore A) ASTM D-2240 92
Elongation rate（%） ASTM D-412 482
Tensile strength（Mpa） ASTM D-412 22
Tear strength (kN/m) ASTM D-624 85
Impermeability (0.4Mpa/2h) GB/T23446-2009 impermeable
Wear resistance（750g/500r）/mg HG/T 3831-2006 4.2
Adhesive strength（Mpa）concrete base HG/T 3831-2006 3.2
Adhesive strength（Mpa) steel base HG/T 3831-2006 11.3
Density（g/cm³） GB/T 6750-2007 1.02
Cathodic disbondment [1.5v,(65±5)℃, 48h] HG/T 3831-2006 ≤15mm

Chemical resistance

Acid resistance 10%H2SO4or 10%HCl,30d No rust, no bubbles, no peel off
Alkali resistance 10%NaOH, 30d No rust, no bubbles, no peel off
Salt resistance 30g/L,30d No rust, no bubbles, no peel off
Salt spray resistance, 2000h No rust, no bubbles, no peel off
Oil resistance 0# diesel, crude, 30d No rust, no bubbles, no peel off

(For reference: the above data is acquired based on GB/T9274-1988 test standard. Pay attention to the influence of ventilation, splash and spillage. Independent immersion testing is recommended if requires other specific data)

Application environment

Environment temperature 0℃-45℃
Product pre-heat temperature 65℃-70°C
Pipe pre-heat temperature 55℃-65℃
Relative humidity ≤90%
Dew point ≥3℃

Application guide

Recommend spray machine GRACO H-XP3 Polyurea spray equipment
Spray gun Fusion-air purge or mechanical purge
Static pressure 2300-2500psi
Dynamic pressure 2000-2200psi
Recommend film thickness 1000-3000μm
Recoating interval ≤6h

Product curing time

Substrate temperature Dry Foot traffic Solid dry
+10℃ 30s 45min 7d
+20℃ 23s 15min 6d
+30℃ 17s 5min 5d

Note: the curing time varies with the environment condition especially the temperature and relative humidity.

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Technical Specifications

BW3-900

Products Information

Item Part A Part B
Appearance Pale yellow liquid Adjustable color
Specific Gravity (g/cm³) 1.12 1.05
Viscosity (cps) @25℃ 800 650
Solid Content (%) 100 100
Mix Ratio (by volume) 1 1
Gel Time (second) @25℃ 4–6
Theoretical Coverage (DFT) 1.08 kg/㎡, film thickness: 1 mm

Physical Properties

Item Test Standard Result
Hardness (Shore A) ASTM D-2240 92
Elongation Rate (%) ASTM D-412 482
Tensile Strength (MPa) ASTM D-412 22
Tear Strength (kN/m) ASTM D-624 85
Impermeability (0.4MPa / 2h) GB/T 23446-2009 Impermeable
Wear Resistance (750g / 500r) / mg HG/T 3831-2006 4.2
Adhesive Strength (MPa) - Concrete Base HG/T 3831-2006 3.2
Adhesive Strength (MPa) - Steel Base HG/T 3831-2006 11.3
Density (g/cm³) GB/T 6750-2007 1.02
Cathodic Disbondment [1.5v, (65±5)℃, 48h] HG/T 3831-2006 ≤15 mm

Chemical Resistance

Test Item Result
Acid resistance 10%H2SO4 or 10%HCl, 30d No rust, no bubbles, no peel off
Alkali Resistance 10% NaOH, 30d No rust, no bubbles, no peel off
Salt Resistance 30g/L, 30d No rust, no bubbles, no peel off
Salt Spray Resistance, 2000h No rust, no bubbles, no peel off
Oil Resistance 0# diesel, crude, 30d No rust, no bubbles, no peel off

For reference: the above data is acquired based on GB/T9274-1988 test standard. Pay attention to the influence of ventilation, splash and spillage. Independent immersion testing is recommended if other specific data is required.

Application Environment

Environment Temperature 0℃–45℃
Product Pre-heat Temperature 65℃–70℃
Pipe Pre-heat Temperature 55℃–65℃
Relative Humidity ≤90%
Dew Point ≥3℃

Application Guide

Recommend Spray Machine GRACO H-XP3 Polyurea Spray Equipment
Spray Gun Fusion-air purge or mechanical purge
Static Pressure 2300–2500 psi
Dynamic Pressure 2000–2200 psi
Recommend Film Thickness 1000–3000 μm
Recoating Interval ≤6 h

Product Curing Time

Substrate Temperature Dry Foot Traffic Solid Dry
+10℃ 30 s 45 min 7 d
+20℃ 23 s 15 min 6 d
+30℃ 17 s 5 min 5 d

Note: the curing time varies with the environment condition, especially temperature and relative humidity.

Shelf Life & Packing

Shelf Life - Part A 10 months
Shelf Life - Part B 10 months
Storage Temperature +5℃–35℃
Packing Part A 210kg/drum, Part B 200kg/drum
Storage Note Keep the package sealed well. Store in a cool and ventilated place. Avoid direct sunshine exposure.

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