SILCOR 580 is a two-part, low-odour, Class III polyurethane waterproofing membrane for demanding horizontal roofs, decks, podiums and plant-room floors. Its chemically cured coating forms a tough, flexible waterproof barrier on properly prepared substrates set to falls.
SILCOR 580 suits exposed and protected areas. For heavy foot or light vehicle traffic, the completed system needs a SILCOR 580 wear coat with broadcast aggregate and SILCOR Top Coat 80. Foot-traffic-only systems may use a different protective finish, including SILCOR Top Coat 75 where specified.
Membrane thickness, primer and surface protection depend on the project. Without a separate specification, the system calls for at least 1.5 mm dry film thickness in non-traffic or foot-traffic areas, or 3.0 mm for heavy foot and light vehicle traffic. For concealed waterproofing, compare SILCOR 560 HB.
Where can I use SILCOR 580?
Use it on suitable horizontal roof decks, balconies, podiums, plant-room floors and trafficable areas with the specified system.
When can it be flood tested or topped?
Allow approximately 15 hours at 23°C and 60% relative humidity. Site conditions affect curing.
When can traffic use the finished surface?
Follow the cure and traffic limits for the completed system. Heavy foot and light vehicle traffic needs the SILCOR 580 wear coat and Top Coat 80.
What substrate moisture is acceptable?
Check the complete primer system. Prepared substrates below 5% moisture may suit Primer BS; higher-moisture concrete needs an approved alternative.
| Property | Value |
|---|---|
| Base Chemistry | High solids, 2-part reaction curing polyurethane |
| Mix Ratio By Weight | 100 : 100 w/w |
| Specific Gravity (Mixed Membrane) | 1.23 g/ml |
| Brookfield Viscosity (Mixed Membrane) | 6,500 mPa.s |
| Solid Content | 97 %w/w |
| VOC Content | <35 g/L |
| Working Time (23°C / 60% RH) | 25 minutes |
| Pot Life | 30 minutes |
| Tack Free Time | 4 hours |
| Set Time | 3 hours |
| Min Recoat Time (23°C / 60% RH) | 15 hours |
| Max Recoat Time (23°C / 60% RH) | 36 hours |
| Min Through Cure Time (23°C / 60% RH) | 15 hours |
| Rain Resistant Min Cure Time (23°C / 60% RH) | 3 hours |
| Ready For Flood Testing / Topping / Backfilling (23°C / 60% RH) | 15 hours |
| Shore A Hardness | 80 °A |
| Tensile Strength | >7.0 MPa (AS 4858) / >8.0 MPa (AS 4654.1) |
| Elongation | >500 % (AS 4858) / >700 % (AS 4654.1) |
| Classification | Class III High Extensibility – AS 4858-2004 / AS 4654.1-2012 |
| Movement Capability | Pass – No fatigue cracking exhibited |
| Bond Strength | >7.7 N (AS 4654.1) |
| Water Vapour Transmission | 7.99 g/m²/24h |
| Water Resistance | Pass |
| Chemical Resistance | Pass |
| Resistance To Detergent Immersion | Pass |
| Heat Aging | Pass |
| Service Temperature | -40°C to +100°C |
| Substrate Temperature Range | +5°C to +35°C |
| Ambient Temperature Range | +5°C to +35°C |
| Relative Humidity Range | 35% to 85% |
| Dew Point | Minimum 3°C below substrate temperature |
| Minimum DFT (Non-Traffic / Foot Traffic) | 1.5 mm |
| Minimum DFT (Heavy Foot Traffic / Light Vehicle Traffic) | 3.0 mm |
| Mixing Ratio | 100 : 100 w/w |
| Viscosity | Polyol = 6,000; Iso = 5,000; Mixed Membrane = 6,500 |
| Specific Gravity | Polyol = 1.40; Iso = 1.05; Mixed Membrane = 1.23 |
Here are some common examples on where SILCOR® 580 used by our customers.
