Demsun Mega Foam - 850Ml
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Product Information
Full details
Demsun Mega Professional PU Foam is an ideal choice for contractors and trade professionals who require high-yield expansion for sealing, filling, and insulating gaps in construction projects. This single-component polyurethane foam offers superior volume output compared to standard aerosols, ensuring efficiency on large-scale jobs; however, users should note that it requires a dedicated applicator gun for effective use rather than the standard straw nozzle found in consumer-grade cans.
All features
| Model Part Number | P77 |
|---|---|
| Brand | Demsun |
Extended Product Information
FAQs
Can I use this foam without a gun?
No, this product is specifically designed for use with a professional applicator gun to manage its high yield and pressure.
How do I remove foam from my hands?
Cured foam can only be removed mechanically or by sanding. Fresh foam can be cleaned with an acetone-based foam cleaner.
Is the foam waterproof?
The cured foam is moisture-resistant but should be covered or painted if it will be directly exposed to UV sunlight, as UV rays will degrade the foam over time.
What is the best temperature for application?
Best results are achieved between +5°C and +30°C. Do not apply in extreme freezing or high-heat conditions.
How long does it take to fully cure?
The foam is typically tack-free within 10 to 15 minutes and can be cut within an hour depending on humidity and temperature.
Troubleshooting
Foam stops flowing during application
Check if the canister is empty by weighing it; if not empty, ensure the gun trigger and flow control knob are fully open.
Foam is leaking from the gun adapter
Ensure the canister was screwed on tightly and the gasket inside the gun adapter is not damaged or missing.
Cured foam is shrinking or collapsing
This often occurs in overly dry conditions; lightly mist the area with water before and after application to facilitate proper curing.
Pros and Cons
Pros
- Significantly higher volume output than standard retail cans
- Precision control for minimizing excess material waste
- Fast curing time for improved job site efficiency
- Strong adhesive properties on a variety of substrates
Cons
- Requires a separate professional applicator gun purchase
- Gun cleaning requires specialized solvent cleaner after every use
- Large expansion rate may lead to messy overflows if over-applied
Setup, Compatibility & Care
To begin, shake the canister vigorously for at least 30 seconds before attaching it to the professional applicator gun. Screw the canister onto the gun adapter firmly while holding the gun upside down. Once attached, use the flow control knob on the rear of the gun to adjust the bead size.
Compatibility includes most standard construction surfaces, though it is recommended to dampen surfaces with a water sprayer to improve curing and cell structure. After use, do not remove the canister if there is still foam remaining; leave it attached to the gun until the next job to maintain pressure. If storing for long periods, always clean the gun tip and adapter using a dedicated PU foam cleaner to prevent the valve from seizing.