DELIVERY AUSTRALIA WIDE – SHOWROOM & WAREHOUSE VIC
- 1/11 Industrial Avenue Thomastown VIC 3074
- 0411 120030
DELIVERY AUSTRALIA WIDE – SHOWROOM & WAREHOUSE VIC
CONCRETE COATINGS
LIQUID LASTIC PU-991 Cutting-Edge, Fast-Curing Polyurethane Waterproofing Membrane for Superior Surface Protection
LIQUID LASTIC PU-991 is an advanced, fast-curing, two-component polyurethane membrane engineered to deliver exceptional surface protection in both industrial and construction settings. Its unique formulation allows it to form a highly elastic, seamless, and durable membrane that adapts to surface movement, making it ideal for areas subject to mechanical stress, harsh chemicals, and environmental challenges. This product excels in a wide range of applications, offering long-lasting performance and a solution to various surface protection needs.
Unmatched Flexibility and Durability
One of Liquid Lastic’s standout qualities is its high elasticity. This flexibility ensures that the membrane can withstand expansion, contraction, and other surface movements without cracking or losing its protective capabilities. This makes it particularly valuable in areas exposed to dynamic loads or temperature fluctuations, such as roofs, balconies, and terraces, where constant movement can otherwise cause traditional coatings to fail.
Its durability means the membrane provides consistent protection over time, resisting wear and tear from frequent use or exposure to harsh conditions. Once applied, Liquid Lastic creates a resilient barrier that stands the test of time, reducing the need for frequent repairs or reapplications, even in tough industrial environments.
Versatile Adhesion to Multiple Surfaces
Liquid Lastic’s formula is designed to bond strongly to a variety of surfaces, including:
Concrete
Metal
Ceramic tiles
Asphalt
This versatile adhesion makes it an excellent choice for both new construction and refurbishment projects, offering superior bonding even on difficult substrates. Whether you’re applying it on horizontal or vertical surfaces, Liquid Lastic ensures full coverage and adhesion, preventing water infiltration, chemical spills, or mechanical damage from compromising the structure.
Outstanding Chemical and Mechanical Resistance
In industrial settings, surfaces are often exposed to harsh chemicals, oils, fuels, and solvents, all of which can erode or degrade traditional coatings. Liquid Lastic offers superior chemical resistance, standing up to a wide range of corrosive substances, making it perfect for use in factories, warehouses, and facilities where chemical exposure is a concern. Additionally, its mechanical resistance ensures that the membrane can withstand impacts, abrasions, and heavy foot or vehicular traffic without sustaining damage, making it a reliable option for high-traffic areas.
Two-pack polyurethane waterproofing membrane
Most waterproofing doesn’t fail because the product was bad. It fails at a joint, a lap, or a hairline crack that opened up six months later when the slab moved.
Liquid Lastic is a liquid-applied membrane, so there are no joints to fail. You roll or spray it on; it cures into one continuous elastic skin, and it stretches with the substrate instead of cracking when the substrate moves. That’s the whole point of it.
It goes on balconies, terraces, flat and low-pitch roofs, planter boxes, plant rooms, and below-grade concrete — anywhere water has to stay on one side of a surface that isn’t going to sit perfectly still.
At 80% solids, it lays down 200 microns per coat. Two coats give you up to a continuous 500 micron film — thick enough to take foot traffic and still be there in ten years, not a thin skin that wears through at the doorway first.
A 10 litre kit does about 30 square metres at two coats over smooth, primed concrete. Rough or porous surfaces drink more — allow 15 to 20 percent on top.
It bonds to concrete, screed, metal, ceramic tile and asphalt. Brush, roller, or squeegee, whichever suits the job.
Left bare in full sun, it will yellow and chalk, the way every aromatic polyurethane does. If the membrane is going to stay exposed — an open balcony, a walk-on roof deck — overcoat it with Polyurit PU-232. That’s an aliphatic polyurethane, so it holds its colour and takes the UV hit instead of the membrane.
| Mix ratio | 3:2 by Volume Part A to Part B |
| Pot life | 30 minutes at 25°C |
| Touch dry | 8 hours |
| Recoat window | 8 to 48 hours |
| Full cure | 7 days |
| Volume solids | 80 ± 5% |
| Build | 200 µm DFT per coat |
| Elongation at break | 110% |
| Service temperature | 0°C to 60°C |
| VOC | Max 90 g/L |
| Specific gravity | 1.25 kg/L (A+B combined) |
Pot life is 30 minutes at 25°C. On a hot Melbourne roof in February, you’ll get closer to 15 mins. Mix what you can lay in that window, not the whole kit.
This is a hard flexible membrane which needs to be coated by UV resistance top coat.
Grind or abrade back to an open profile. Get rid of every bit of laitance and any old coating. Then check the slab is actually dry — not “looks dry”, properly dry.
Trapped moisture is what kills membranes. Not the product, not the weather, not the application. We’ve seen more failures from someone coating a slab that wasn’t ready than from everything else put together.
Primer Recommended
Part A and Part B. Download the TDS · Download the SDS
Questions about a specific job? Call us on (03) 9936 0531 — we’d rather talk it through first than sort out a problem later.
Code: PU 991
Membrane Polyurethane
High Solid Expandable
10L covers up to 30 Sqm
| Colours | Greyish | ||
| Finish | Gloss | ||
| Solid Content (by Volume)-% | 68±5 | ||
| Theoretical Spreading rate | 6m2 /lit 200 Mic | ||
| Flash point | 28°C | ||
| Specific gravity | 1.25 kg/lit A+B | ||
| V.O.C. | Max. 90gr/lit |
To find out how much of our product is needed, please enter the area of your project and the amount of coats you would like to apply and let our paint calculator do the rest.
Spread Rate: 3 – 6m2/L (2 coats are recommended)
*Read the TDS (Technical Data Sheets), SDS (Safety Data Sheets) and installation instructions prior to use.
Pete Moung –
Happy with the product and service recomended by sam. Must visit.
Tom carlson –
Highly recommended! Daniel and Andrew were incredibly helpful and gave excellent advice throughout the process.
Elijah Reed –
The team was reliable, efficient, and delivered great results.
Sam Morgan –
Excellent waterproofing service from start to finish.
Mehmet Maral –
Everything was done properly and the results have been great so far. Highly recommend!
Oliver Thompson –
The membrane installation was completed professionally and the quality of work was outstanding. Highly recommended!
Hekmit Olsoon –
Very satisfied with the waterproofing membrane.
Jan Dimitri –
Result was good. Would definitely use them again!
Jaky spring –
Used their waterproofing membrane service recently and was very impressed with the quality and professionalism.