Akfix Thermcoat Spray Foam Insulation Kit - Closed Cell R-5.66

In this review of the Akfix Thermcoat Spray Foam Insulation Kit, the bottom line is simple: it is a practical closed cell spray foam for DIYers and professionals who need fast thermal and acoustic sealing with good adhesion and paintability. The kit stands out for its R-value of 5.66 for closed cell foam and the included applicator gun and cleaner, which make application easier than single cans alone. The main reason to buy is the combination of quick curing chemistry and specialized nozzles for vertical and ceiling work, which reduces fiddly set up on small to medium jobs.

Key Features

• Closed cell R-value: Offers a high R-value of 5.66, providing durable thermal resistance for walls and attic spaces.
• Included applicator: Comes with a gun and cleaner so customers can apply foam more precisely and resume work later with the can attached.
• Two nozzle options: Nozzle A for vertical wedged spray and Nozzle B for ceiling work, which helps control spray pattern in different orientations.
• Paintable and adhesive: The formula bonds well to most building materials and accepts paint, allowing for finishing after full cure.
• Quick curing chemistry: Fast chemical bonding reduces wait time, with a recommended 24 hours to reach full cure for best results.
• Class-A fire rated: Tested for enhanced fire resistance, making it suitable for residential and commercial applications that require safer insulation materials.

Who It's For

The Akfix Thermcoat kit is best for homeowners tackling small to medium DIY insulation projects, contractors needing a compact kit with gun and cleaner, and anyone wanting a paintable, closed cell foam with good thermal and acoustic properties. The included nozzles and applicator make it convenient for patching gaps, sealing around windows and doors, or insulating attic penetrations.

It is less appropriate for very large commercial spray-foam projects where bulk supplier systems are more economical, or for users who expect uniform coverage without practicing spray technique first; some users reported mixed coverage and adhesion results when application distance and surface prep were not followed.

Pros & Cons

Pros

• High R-value closed cell foam delivers reliable thermal insulation and sound dampening.
• Gun and cleaner included for more controlled application and easier restart between uses.
• Paintable and adheres to many substrates, allowing a finished look after curing.
• Two nozzle choices improve control for vertical and ceiling applications.

Cons

• Coverage and adhesion can be mixed in practice, so careful technique and surface prep are required.
• Product aging can be affected by high heat and humidity, so storage conditions are important.

Specifications

Our Verdict

The Akfix Thermcoat Spray Foam Insulation Kit is a solid value for DIYers and tradespeople who need a paintable, closed cell foam with included gun and cleaner for controlled application. It delivers strong thermal performance and quick cure when used with proper technique, though buyers should follow storage and application guidance closely to avoid adhesion or coverage variability. Overall, it is a practical choice for patching, sealing, and insulating small to medium areas.

Frequently Asked Questions

How long until the foam is fully cured?
Allow about 24 hours for a full cure, though initial set is faster due to the quick chemical bonds.

Can the foam be painted?
Yes, the formulation is paintable after the foam has fully cured.

What surfaces will it adhere to?
It adheres to many building materials including drywall, wood, concrete, brick, metal, PVC, and more, but clean, dry surfaces and proper technique improve results.