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For small touch-ups, one cartridge can last half a day. Change the job to factory walls, cold-store envelopes, modular housing, roof voids or rows of pipe penetrations, and the rhythm changes immediately: the cartridge runs out, the gun stops, and the place where it stopped is where the joint shows. At inspection the question is rarely whether the gap was filled — it is whether the fill is continuous.
The productivity gap in continuous work is really a gap in area covered per hour. A spray route turns point-by-point dispensing into a continuous pass, cutting cartridge changes, stop-start cycles and the number of overlap seams at the same time. XMC F99 (Spray PU Foam) is a one-component polyurethane foam built around that logic: moisture curing, beige foam.
According to the TDS, F99 expands approximately 45–50 times in the gun type and 35–40 times in the straw type, with cured densities of 25–30 kg/m³ and 30–35 kg/m³ respectively.
On large areas the expansion ratio matters more than on small joints. The same cartridge covers a larger cavity volume, so cartridge changes become rarer — and fewer changes mean fewer stop marks and less variation in thickness. Where a continuous surface is required, that decides both appearance and sealing integrity.
Low density carries practical value too. A cured density of 25–30 kg/m³ keeps the weight of the fill low, so foam applied in ceiling voids, facade cavities and lightweight envelopes does not become an additional structural load.
Spraying produces a continuous layer of foam, and its reliability depends on adhesion to the substrate. Without bonding, thickness is only coverage.
The TDS specifies tensile strength (aluminium panel) of 70–110 kPa and shear strength (aluminium panel) of 100–180 kPa (ISO 844:2021). These values indicate effective bonding to metal substrates after curing, able to carry a degree of pull-off and shear rather than merely resting on the surface.
Together with its closed-cell structure and moisture-curing system, the cured foam provides the basic sealing, thermal insulation and acoustic performance required for gap filling, cavity filling and insulation work.
F99 is tack-free in 5–10 minutes, fully cured in 24 hours, with a clipping time of 20–45 minutes.
The risk on a large area is starting the next section only to find the previous one has already begun to cure. The way to use these figures is by zone: work back from the lower end of the clipping time to size each pass, divide the area into blocks, and complete filling and tooling block by block. That avoids working over a surface that has already skinned, and avoids leaving untooled edges in the rush.
After 24 hours the foam reaches full properties and finishing trades can follow — coatings, board, or direct exposure.
Post-curing temperature resistance is -40 °C to +100 °C, covering typical factory, cold-store perimeter and building envelope conditions.
F99 has a shelf life of 12 months. Store in a cool, dry place away from light, protected from heat and moisture, and rotate first-in first-out. Spray operations usually draw stock in batches against a project, so issuing in line with the installation schedule is preferable to opening a whole batch that then sits in storage.
| Item | Gun Type | Straw Type |
| Density (kg/m³) | 25–30 | 30–35 |
| Foam expansion ratio (times) | 45–50 | 35–40 |
| Tensile strength, aluminium panel (kPa) | 70–110 | — |
| Shear strength, aluminium panel (kPa) | 100–180 | — |
| Minimum canister temperature before use (°C) | >5 | — |
| Operating ambient temperature (°C) | 5–35 | — |
| Optimal application temperature (°C) | 18–25 | — |
| Tack-free time (min) | 5–10 | — |
| Fully curing time (hour) | 24 | — |
| Clipping time (min) | 20–45 | — |
| Post-curing temperature resistance (°C) | -40 to +100 | — |
| Minimum relative humidity | ≥45% | — |
| Foam colour | Beige | — |
| Shelf life (month) | 12 | — |
| Curing system | Moisture curing | — |
Density to FEICA TM1019:2014, expansion ratio to FEICA TM1003:2013, shear strength to ISO 844:2021. Values are typical figures obtained under the conditions specified in the TDS and may vary with substrate, application method and site conditions.
Shanghai XMC New Material Technology Co., Ltd. was founded in 2004 and specializes in the research, development and manufacturing of sealants and adhesive products for construction and industrial applications. With more than two decades of industry experience, XMC has built a modern production system integrating product development, manufacturing and international trade, with a plant area of approximately 80,000 m², annual output of approximately 60,000 t, and more than 500 containers shipped per year.
XMC's product portfolio covers silicone sealants, hybrid sealants, MS sealants, liquid nails, polyurethane foam, automotive sealants and various industrial bonding materials. The company serves global distributors, building material suppliers and project customers with stable products and customized services, backed by 20 years of OEM/ODM experience and more than 1,000 custom colours.
For more information about XMC products and cooperation opportunities, please visit: https://www.xmcsil.com
