Akfix 805P PRO Gap Filler Expanding Foam Sealant Kit - High Yield

In this review the Akfix 805P PRO Gap Filler comes across as a practical, trade-ready expanding foam kit for installers and serious DIYers who need fast, reliable gap filling. The single biggest reason to buy is its combination of higher yield and gun-applied control, which makes it efficient on larger jobs while still producing a rigid, continuous insulating layer for thermal and sound insulation. It is presented as a reusable gun foam system with cleaner included, so teams working on window and door installation or building envelope repairs will find the workflow familiar and time saving.

Key Features

• Higher yield: The kit delivers an economical foam output so a single can can expand to a large volume, reducing material cost on bigger projects.
• Gun-applied control: The applicator gun lets the user regulate flow precisely for neat fills around frames and joints.
• Durable insulation: Once cured the rigid foam forms a continuous layer that helps eliminate thermal bridges and improves sound insulation.
• Low environmental impact: The foam contains no ozone-depleting propellant gases, making it a more environmentally conscious choice for construction work.
• Versatile use: It adheres to many building materials and is suitable for fixing and insulating door and window frames, walls, gaps and cavities.
• UL certified: The product classification includes UL certification, providing added reassurance for specifiers and contractors.

Who It's For

This kit is well suited to professional installers, builders and experienced DIYers who need a reliable, high-yield expanding foam for window and door installs, sealing larger wall cavities, or improving thermal and acoustic performance. The gun and cleaner included are helpful for users who plan frequent use and want consistent, controlled application.

Those working exclusively on tiny craft projects or who need a minimal single-use touch-up option should look elsewhere, as this kit is optimized for repeat use and higher-volume applications where yield and gun control produce clear time and cost savings.

Pros & Cons

Pros

• High yield reduces material consumption on larger jobs and stretches budget further.
• Gun attachment gives precise control over bead size and reduces waste during application.
• Creates a rigid, continuous insulating layer that improves both heat and sound insulation.
• Spray quality and foam thickness are praised by customers for consistent performance and economy.

Cons

• Best performance requires following recommended temperature range and handling instructions, which adds a bit of setup compared with simple aerosol cans.

Specifications

Product type	Polyurethane applicator gun foam kit
Pack size	12 x 24 oz cans (gun and 2 cleaner included)
Foam colour	Light yellow
Yield	Up to 45 litres per can depending on temperature and humidity
Application temperature	28 F to 86 F
Optimal can temperature	68 F
Certification	UL classified

Our Verdict

The Akfix 805P PRO kit is a strong choice for professionals and dedicated DIYers who need a cost-effective, gun-applied expanding foam with reliable spray quality and high yield. Its durable cured foam and UL classification make it suitable for sealing around windows, doors and cavities while saving time and material on larger jobs, offering solid value when used within the recommended temperature range.

Frequently Asked Questions

How should the can be stored and prepared before use?
Store and use the can at recommended temperatures; optimal can temperature is 68 F and application is best between 28 F and 86 F; shake well before use and keep can upside down while applying.

Does the kit include a gun and cleaner?
Yes, the kit is supplied with an applicator gun and two cleaner units so the gun can be flushed and reused.

Is the foam environmentally friendly?
The formula contains no propellant gases harmful to the ozone layer and is presented as a lower-impact option relative to older propellant-based foams.