Spray Foam For Asbestos Encapsulation

About Spray Foam Asbestos Encapsulation

Before removing asbestos sheeting, why not consider Spray Foam as your solution!

Nexseal LE and Sucraseal offer a viable alternative to removing asbestos. The strong bond of the spray form to roof or walls sheets helps to encapsulate, protect and extend the life of an asbestos material.


Spray Foam forms an exceptionally strong bond to asbestos


Spray Foam can be used to envelope and trap asbestos fibres


Spray Foam prevents dangerous fibres from becoming airborne

Where To Use Spray Foam For Asbestos Encapsulation

Nexseal LE is a high-density closed cell spray foam that has strong adhesion. Nexseal LE helps to protect any asbestos containing materials that are in reasonable condition and as little as 10-15mm can ensure asbestos is suitably sealed. Provided Nexseal LE is not damaged once installed, it should last with the life of the substrate to provide long-term peace of mind and avoid the more expensive costs attributed to the removal of asbestos.


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Use one of our ThermoFoam-approved installers


Once installed, we provide a 25-Year Product Warranty


Check out our Gallery where you will find some photographs of installations we’ve completed in the past. Whilst spray foam is insulation and not decoration, our experienced installation teams will always endeavour to provide a neat and tidy finish to the insulation. Nexseal LE closed cell is easier to achieve a neater finish whereas Sucraseal Open Cell expands at a faster rate to leave an undulated finish.


How does the spray foam trap asbestos?

The spray foam hits the surface as a liquid and expands instantly to leave the substrate completely coated. This process prevents fibres from escaping and the spray foam will bond seamless to the surface on which it’s applied. We don’t recommend encapsulating asbestos that has already broken down and is structurally unsafe. Encapsulation should only take place when the asbestos bearing material is in good condition.

Isn’t it the law to remove asbestos?

No – asbestos was made illegal in the 1990’s for future use, however, it is not illegal to have asbestos in your building. When detected, you need to make an asbestos management plan as to how you intend to mitigate the risks of fibres becoming airborne. This can either be resolved through licensed removal or it can be encapsulated if it poses little threat to any inhabitants. Encapsulation is always a viable consideration.

Can we stay in the building during the process?

No – we recommended you are not within the building or the asbestos containing zone whilst we are carrying out encapsulation work. The pressure of the foam liquid hitting the surface can lift any loose fibres on the surface. We would only carry out encapsulation using spray foam in situations where the Asbestos containing material is a low grade, low risk to the wider public.

Do I need Open Cell or Closed Cell spray foam?

The adhesion of closed cell is unparalleled and it will usually bond to just about any type of surface. For this reason, we recommend its use. Closed cell spray foam is also a very dense material and once cured is extremely hard and durable. This means it’s unlikely to be penetrated and damaged which in turn could damage the asbestos. Open cell is less suitable as it can be subject to cohesive failure and has the density of a sponge.

How long will the spray foam last?

The closed cell spray foam should last with the life of the building or surface onto which it’s applied, this means that if an asbestos bearing material is in good condition, there’s no reason that once encapsulated, it can last for an indefinite period of time. Encapsulation can be seen as a way to simply delay costly removal and pass on the problem to future generations. Whilst this is true, on occasions, removal can pose more harm than good.

What Condition Does The Asbestos Need To Be In?

When encapsulating asbestos, it should be in good condition with the substrate mainly intact. The structural integrity of the substrate should be firm and not at the stage where additional weight could cause it to break down further. We tend to avoid any substrate where asbestos is loose and fibres are already being released, however, a survey will generally tell us all we need to know.

Our Products

Check out our BBA Certified Spray Foams

Our range of open and closed cell spray foams are industry-leading, BBA-Certified, use recycled materials and contain water-based blowing agents.

Nexseal Closed Cell

This low exothermic, high-lift closed cell foam boasts a fast installation time, offers incredible thermal performance and improves the structural integrity of a building. Loved by installers for its fast rise, Nexseal is ozone-friendly and is pending BBA certification which is due in June 2022.

Sucraseal Open Cell

The leading open cell foam now available in the UK. Sucraseal combines peace of mind British Class 1 fire safety with exceptional thermal performance and is pending BBA Certification which is due in June 2022. Sucraseal is installed exclusively by ThermoFoam-approved contractors only.

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