ProTXcoat 307DWPU

Poly Urethane FG

Polyurethane coating

307DWPU is a high performance solvent free polyurethane coating designed for use as a lining system for tanks, containment areas and steelwork.

A two component solvent free polyurethane coating that has been designed to be applied steel and primed concrete surfaces. The coating has UK WRAS BS 6920 approval for contact and immersion conditions with drinking water. The coating also has excellent chemical resistance to Chlorination agents such as 15% Sodium Hypochlorite, Chlorine & Chlorine Dioxide.

The product can be applied by brush, roller or spray and once cured will give a flexible long term chemical & corrosion protection to steel and concrete surfaces.

  • Chemical storage tanks
  • Drinking water tanks
  • Drinking water pumps
  • Structural steel
  • Internal pipe line surfaces
  • Containment areas
  • Scraper blades
  • Chemical process flooring

307DWPU is based on a complex blend of high molecular weight polyols and urethane polymers blended with inert pigments and silicas reacted with an amine accelerated isocyanate resin which produces a system with exceptional abrasion, erosion, chemical and corrosion resistance.

307DWPU offers a high degree of flexibility and is suitable for use on steel, concrete, aluminium, GRP, galvanised or mineral surfaces subject to chemical attack.


Steel Surfaces – Heavy contamination due to oil or grease must first be removed using MEK (Methyl Ethyl Ketone). Surfaces should then be abrasive blast cleaned to a minimum Sa21⁄2 – Sa3 BS7079 Part A1 : 1989 or equivalent with a blast profile of 75 – 125 microns corresponding to ‘Rough’ in ISO 8503/1. All loose abrasive dust and debris must be blown clear or vacuum cleaned away.

Existing steel surfaces which have corroded in a chemical environment may be contaminated by soluble iron salts within corrosion pits. To prepare these surfaces it is recommended that one of the following treatments be carried out prior to final dry abrasive blasting to the specified standard.

a) Blasting with a mixture of clean water and abrasive.

b) Initial dry blast cleaning to remove corrosion and surface coatings followed by high pressure clean water jetting (minimum 1000 psi/66 bar).

Concrete Surfaces – All concrete to be coated should either be lightly abrasive blast cleaned using wet or dry abrasive techniques or alternatively high pressure water jetting. Care must be taken not to expose the aggregate in the concrete. All dust and abrasive material shall be removed from the surface prior to coating. Concrete surfaces should have a maximum moisture content of 7% prior to any coating being applied. Concrete surfaces must be primed with ProTXcoat 302 epoxy primer in accordance with the product tech sheet.

300FC is a two component material comprising base and activator components which must be mixed together prior to use.

Stir the contents of the base component, continue stirring and gradually add the total contents of the activator container, stir the combined mix until completely homogeneous.

The mixed materials should be used within 25 minutes of mixing at 20°C (68°F). This time will be reduced at higher temperatures and extended at lower temperatures.

Application should not be carried out at temperatures below 5°C nor when relative humidity exceeds 85% or when the surface to be coated is less than 3°C above the dew point.

300FC is suitable for application by brush or roller, using good quality brushes or short to medium pile rollers.

On concrete surfaces it is important to stipple the 300FC into the primed surface to ensure good wetting of the surface.

Coverage Rate
2.24sqm per kg at 250 microns

Detailed working recommendations are available from the Technical Centre on request.

Mixing Ratio3 parts base to 1 part activator by volume
AppearanceBaseViscous coloured liquid
ActivatorDark brown liquid
Drying & Cure Times at 20°C (68°F)Usable Life20 min
Touch Dry4 hours
Hard Dry8 hours
Minimum Overcoating4 hours
Maximum Overcoating24 hours
Hours Full Cure7 days
Volume Solids100%
Shelf LifeUse within 2 years if purchase. Store in original sealed containers at temperatures between 5°C (40°F) and 30°C (86°F).

Abrasion Resistance
130 mgm weight loss per1000 ASTM D4060
cycles-1kg load- CS17 Wheel

Impact Resistance
19.75 Joules (175 in lbs) ASTM D256

Direct Pull Adhesion
63 kg/cm2 (900 psi) – steel ASTM D4541
35 kg/cm2 (500 psi) – concrete
(Concrete Failure)

Dry Heat Resistance
100°C (212°F) ASTM D2485

Water Vapour Permeability
5.6 x 10-6
ASTM D1653

Salt Fog Resistance
Excellent, unaffected after 10,000 ASTM B117 hours exposure

Tensile Strength
200 kg/cm2 (2825 psi) ASTM D638

Scratch Resistance
No failure 2.5 kg (5.5lbs) load BS 3900 P

BS 6920 Suitability of non-metallic products for use in contact with water intended for human consumption with regard to their effect on the quality of the water MAT/LAB 627L

As long as normal good practice is observed 307DWPU can be safely used.

Protective gloves should be worn during use.

A fully detailed Safety Data Sheet is either included with the material or is available on request.