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How Many Doors Can You Seal With A Can Of Blue60?

Written by Blue60 | Sep 10, 2025 9:00:00 AM

Properly sealing fire door frames is crucial for the fire resistance of the door and the safety of the building and its occupants. Unsealed gaps around a frame could act as conduits for fire and smoke, compromising the fire door’s integrity, putting the building’s users at risk and increasing the potential for flames to spread.

Blue60 fire-rated foam is designed to create a dense, fire-resistant seal around fire door frames. This helps maintain compartmentalisation in case of fire, slowing the spread of smoke and flames and providing valuable time for evacuation.

Blue60 Foam Coverage

The coverage you get from a Blue60 fire foam can will vary depending on the size of the gaps between the door frame and the wall. The fire-rated expanding foam can be used to seal gaps between 3mm and 30mm.

Coverage also depends on the skill of the person applying the foam and on foam expansion. Typically, a 750ml can yields around 45 litres of foam. When installing standard fire door frames with 10mm gaps, one can is able to seal approximately two to three door frames. If gaps between the doorset and wall are narrower than 10mm, one can of Blue60 could be enough to seal up to five fire doors.

Tools Required

The best way to apply Blue60 fire-rated foam precisely and quickly is to use a foam application gun. These specialist tools help create a steady flow of foam and make it easier to manoeuvre the can around the door frame.

A utility knife may be required to trim excess foam once Blue60 has cured. It’s also important that the professional applying the foam uses appropriate personal protective equipment (PPE) such as gloves and eye protection.

Application Guide

Before applying Blue60 fire-rated foam, it’s important to ensure that all surfaces are clean and free from debris.

Blue60 fire-rated foam should be applied to the gaps around the sides and top of the fire door frame. Gaps should be filled completely to create a robust seal against smoke, flames and hot gases.

Just one can of Blue60 fire-rated foam is enough to seal two to three fire doors, offering installers a quick, affordable and effective way to ensure every fire door installation is up to standard. Contact us and speak to a member of our team to find out more.