Polytuff®-31 is a 100% solids, solvent-free, high build, semi-flexible polyurethane binder. Polytuff-31 can also be pigmented with polyurethane tinters or powder oxides.
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The maximum Polytuff-31 recoat window is 24 Hours @ 25°C. Prior to commencing the next day’s spraying, the cold edge must be mechanically abraded to a minimum of 100 mm wide to reactivate the Polytuff-31 and give acceptable adhesion. Vacuum all grinding swarf as you go. The non-abraded, cured coating must be masked to prevent overspray and provide a neat edge to the new section.
| Volume Solids | 100% |
| Theoretical Coverage | 0.33 Squaremeter / Litre @3000 Microns DFT |
| Finish | Pigmented |
| Colour | Light Beige |
| Gloss | Semi-Gloss |
| Mixing Ratio | 1:3 by volume |
| Gel Time | 20 – 25 Minutes |
| Typical Thickness | 3000 Microns Dry Film Thickness |
| Cleaner | Reactor Flush and Swell |
| Flash Point | >115°C |
| VOC | 0 Grams / Litre |
| Specific Gravity | 1.10 |
| Property | Method | Results |
| Pull-off adhesion value, steel | ASTM D4541 (20mm diameter dolly) | >26 N/mm² |
| Elongation at 24°C | ASTM D412-92 | 50 – 60% |
| Abrasion Resistance | ASTM c501-84, CS-17 wheel @ 1,000rpm with 1,000g weight | 75mg |
| Tensile Strength | ASTM D412-92 | 13 – 14 N/mm² |
| Tear Strength | ASTM D 624-86 | 35 KN/m |
| Hardness | ASTM D 2240-91, Shore A Shore D | 55+/-5 D |
| Water Absorption | AS3558.1 | 0.14 % |
| Water Vapour Transmission | E96-05(B) | 0.015 g / (m.hr)
0.36 g / (m.24hr) |
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