Akfix Thermcoat Spray Foam Insulation Kit (40 Board Feet) - Closed

In this review of the Akfix Thermcoat Spray Foam Insulation Kit, the reviewer finds it best suited to DIYers and professional tradespeople who need a paintable, closed cell foam that bonds to many building materials. The single biggest reason to buy is the combination of a high closed cell R-value of 5.66 and fast curing chemical bonds that create a durable thermal and acoustic seal. This kit aims to cover up to 40 board feet from two 27.1 oz cans and includes two nozzles tailored for vertical and ceiling work, though it does not include a gun or cleaner.

Key Features

• Closed cell R-value: The foam delivers an R-value of 5.66 per inch, giving strong thermal resistance for walls and attic work.
• Paintable and adheres well: The polyurethane formula is paintable and shows excellent adhesion on drywall, wood, concrete and other common substrates when applied correctly.
• Two application nozzles: Nozzle A is designed for vertical wedged spray while Nozzle B is shaped for ceiling and horizontal work, improving control for common tasks.
• Quick curing: The foam forms strong chemical bonds and sets quickly, with a full cure in about 24 hours under normal conditions.
• Wide material compatibility: It is formulated to bond to many surfaces including masonry, metal, PVC, fiberglass and even vehicle bodies for marine or RV projects.
• Class-A fire rated: Tested to meet fire safety standards for safer residential and commercial installations.

Who It's For

This kit is best for homeowners tackling air-sealing, attic rim joist work, or patching around windows and doors who want a durable, paintable closed cell foam. It also suits builders and contractors who prefer a ready-to-use aerosol option with nozzle choices for vertical and overhead spraying.

It is less appropriate for jobs that demand larger continuous coverage without frequent can changes, and customers who require a gun and cleaner included should look elsewhere since those accessories are not provided. Also, expect variable coverage results on very uneven gaps or incorrectly prepared surfaces.

Pros & Cons

Pros

• High R-value closed cell foam offers reliable thermal and acoustic insulation in small to medium gaps.
• Paintable finish and strong adhesion on a wide range of construction materials for lasting repairs.
• Two nozzles for vertical and ceiling applications improve spray control and reduce waste.
• Class-A fire rating adds a safety benefit for residential and light commercial use.

Cons

• Coverage and adhesion receive mixed feedback, so actual board-foot yield may be less on uneven surfaces.
• Gun and cleaner are not included, which some users prefer for repeated professional use.

Specifications

Product type	Closed cell polyurethane spray foam
Pack size	2 cans, 27.1 oz each
Estimated coverage	40 board ft (total)
R-value	5.66 per in
Nozzles	Nozzle A for vertical, Nozzle B for ceiling
Curing time	Full cure ~24 hours
Fire rating	Class-A fire rated

Our Verdict

The Akfix Thermcoat Spray Foam Kit is a practical choice for DIYers and professionals seeking a paintable, closed cell foam with a strong R-value and quick cure time. It offers useful nozzle options and good material compatibility, making it good value for targeted sealing and insulation tasks, provided users accept the kit does not include a gun or cleaner and that coverage can vary with surface condition.

Frequently Asked Questions

How long until the foam is fully cured?
The foam develops a strong set quickly but requires about 24 hours for a full cure under normal conditions.

Will the foam stick to different materials?
Yes, the formula bonds to many substrates including drywall, wood, concrete, metal and PVC, though adhesion can vary on very uneven or dirty surfaces.

Does the kit include an applicator gun and cleaner?
No, the kit does not include a gun or cleaner; the cans come with two nozzles for different application angles.