No nonsense expanding foam around electrical socket

Hi,

I'm looking to fill a small cavity around an electrical socket in a dot & dab wall. I normally fill with easi-fill but this is a tight spot where foam would work well. I've read that Polystyrene foam is not suitable but I just wanted to check if No Nonsense expanding foam from Screwfix was ok? The label says it's contains Polymethylene Polyphenyl Isocyanate, which seems to be a form of Polyurethane but would be grateful if anyone has any experience with this foam or product? Ive tried the technical support line at Soudal but no answer.

Thanks in advance

Sard said:

I'm looking to fill a small cavity around an electrical socket in a dot & dab wall. I normally fill with easi-fill but this is a tight spot where foam would work well. I've read that Polystyrene foam is not suitable but I just wanted to check if No Nonsense expanding foam from Screwfix was ok? The label says it's contains Polymethylene Polyphenyl Isocyanate, which seems to be a form of Polyurethane but would be grateful if anyone has any experience with this foam or product? Ive tried the technical support line at Soudal but no answer.

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Anecdotally ... I've often used expanding polyurethane foam of that type around electrical things, and have never been aware of any problems. When the opportunity to look has presented itself, even after many years of exposure cables show no obvious sign of having come to any harm.

Kind Regards, John

JohnW2 said:

Anecdotally ... I've often used expanding polyurethane foam of that type around electrical things, and have never been aware of any problems. When the opportunity to look has presented itself, even after many years of exposure cables show no obvious sign of having come to any harm.

Kind Regards, John

Click to expand...

Thanks John. I also managed to get through to Soudal, the manufacturer, and they confirmed the No Nonsense Expanding Foam is not corrosive or harmful to electrical cables. The only precaution was that the propellant is flammable, which is clearly labelled on the can anyway.

I hope this helps anyone searching this in the future.