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[Our group order closes on August 3rd, stock is limited!] Japan Arnest Niigata Prefecture Ultimate Formaldehyde Killer · Removes 95% Formaldehyde in 90 Minutes · International Patent, Made in Japan

[Our group order closes on August 3rd, stock is limited!] Japan Arnest Niigata Prefecture Ultimate Formaldehyde Killer · Removes 95% Formaldehyde in 90 Minutes · International Patent, Made in Japan

Regular price HK$198.00
Regular price HK$299.00 Sale price HK$198.00
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Ultimate Formaldehyde Killer|Air Purification Series

International Patents (Japan, Europe, USA) | Made in Japan | Professional Formaldehyde Removal, Odor Elimination, Indoor Air Purification


Not masking odors, but decomposing and eliminating them at the source

Most odor removers and air fresheners on the market only mask odors with fragrance, failing to truly solve indoor air pollution problems. This product uses graft polymerization patented technology to thoroughly decompose formaldehyde, VOCs, and odor substances into harmless compounds through chemical neutralization reactions. It also boasts 99.9% antibacterial performance, making it the most effective solution for formaldehyde removal in newly renovated spaces, smoke odor elimination, and pet deodorization.

Verified by an independent Hong Kong laboratory: Over 95% formaldehyde removed in approximately 90 minutes
Certified by Yokohama National University, Japan: Safe and non-toxic, harmless to humans and pets

This page contains two products; please choose as needed.


【Boxed Gel】AirBrightn Ultimate Formaldehyde Killer 【Spray】Arnest Ultimate Formaldehyde Killer
Best Use Suspended formaldehyde in the air, persistent odors, indoor air purification Formaldehyde removal from furniture surfaces, wallpaper, clothing deodorization, fixed source pollution treatment
How to Use Uncap and place; product naturally volatilizes to purify air Spray directly onto object surface for chemical adsorption and decomposition
Capacity Small box approx. 190ml 400ml per bottle
Effective Range Approx. 150 sq ft / box, lasts 5–6 weeks Depends on application area
Texture Large box: hard gel; Small box: soft gel (hand-filled) Liquid spray



Effectively removes the following odors and harmful indoor substances

  • VOC / Formaldehyde (formaldehyde odor from new renovations, formaldehyde released from new furniture, construction material formaldehyde)
  • Acetaldehyde (cigarette smoke, residual second-hand smoke)
  • Trimethylamine (pet body odor, cat litter smell, fishy smell)
  • Ammonia (body odor, urine smell, toilet odor)
  • Nonenal (elderly odor)
  • Isovaleric acid (foot odor, body odor)
  • Musty smell, cooking fumes, kitchen odors, toilet odors, mold odors, etc.

    This product does not remove: aroma scents, natural odors from new furniture or wood that do not contain harmful substances


Decomposition Principle (Chemical Reaction)

Aldehyde (Formaldehyde) Decomposition:

  • Formaldehyde: R-NH2+HCHOR-NCH2+H2OR-NH2+HCHOR-NCH2+H2O

  • Acetaldehyde: R-NH2+CH3CHOR-NCHCH3+H2OR-NH2+CH3CHOR-NCHCH3+H2O

Odor Substance Decomposition:

  • Ammonia (urine/body odor): R-SO3H+NH3R-SO3NH4R-SO3H+NH3R-SO3NH4
  • Acetic acid (pungent sour smell): R-NH2+CH3COOHR-NHCOCH3+H2OR-NH2+CH3COOHR-NHCOCH3+H2O

Product Ingredients: Graft Polymer, Silver Ions, Water, Preservatives


Boxed Gel | Instructions for Use

Key Usage Conditions (Directly affecting formaldehyde removal and deodorization efficacy):

  • Must be placed in a sealed environment with air circulation (e.g., with air conditioning on, door closed and fan on).
  • The product should be placed in a well-ventilated spot to aid volatilization, allowing active ingredients to fully contact indoor air.

If the above conditions cannot be met, the deodorization and formaldehyde removal effects will significantly decrease. It is recommended to choose the spray version instead.

Usage Steps:

  • For severe odors or high formaldehyde concentration: Remove the protective pad and lid, then place directly (consumes faster, stronger removal effect).
  • For mild odors or daily indoor air maintenance: Remove the protective pad, twist the lid back on to use (consumes slower).

The appearance of white crystals during use is normal. When the product eventually shrinks into a small, hard lump, it indicates it has been depleted.


Spray | Instructions for Use

Method One (Recommended: with a fogging gun for more even coverage)

Formaldehyde removal from paint/wallpaper surfaces:

  1. Perform in a well-ventilated area, preferably with windows open.
  2. Clean the surface with a dry cloth to remove dust.
  3. Spray lightly with a fogging gun from about 30cm away, then let it air dry naturally.

Formaldehyde and odor removal from wardrobes / shoe cabinets / storage cabinets:

  1. Perform in a well-ventilated area.
  2. Clean the surface with a dry cloth.
  3. Spray from about 30cm away, then wipe the surface with a slightly damp cloth, and let it air dry naturally.

Method Two (Without a fogging gun)

Paint / Wallpaper: Spray 1–2 times from about 30cm away until slightly damp, then let it air dry naturally.

Wardrobes / Shoe Cabinets: Spray onto a damp cloth, then wipe the surface, and let it air dry naturally.

Smoke-laden clothes: Spray evenly over the entire garment; no washing required.

Key Usage Points:

  • Spray over a large area as much as possible; do not over-accumulate in one spot.
  • After spraying for formaldehyde removal, it is recommended to open all cabinet doors and windows for ventilation for over 48 hours to accelerate formaldehyde dissipation from indoors.
  • After cleaning with detergent, re-spray to replenish.
  • In humid environments (Hong Kong's high-humidity seasons), a sticky sensation might occur. It's recommended to use a dehumidifier or fan to speed up drying.
  • The product has passed safety tests for import and skin contact in Japan; accidental contact with undried spray is not a concern.

Cost Comparison: DIY vs. Professional Formaldehyde Removal Services


Professional On-site Formaldehyde Removal Service This Product (Spray)
500 sq ft residence × 3 uses Approx. $7,500 Approx. $1,192
Reusable anytime Requires re-booking and payment each time Can be re-sprayed anytime by yourself, continuous effect
Long-term savings Over 80%

Under normal circumstances, 4 spray bottles can be used for a 500 sq ft residence 3 times, addressing multiple post-renovation formaldehyde rebound issues.


Certifications, Application Locations, and Applicable Environments

  • Certified by Yokohama National University, Japan: Effective in formaldehyde removal, non-toxic product
  • Academic papers published in the Building Research Institute of Japan, Japan Indoor Environment Association, Japan Air Cleaning Association, Japan Society of Air-conditioning and Sanitary Engineers, Japan Council for Human Environment, and academic institutions in the USA, China, Singapore, Finland, etc.
  • Passed import and skin contact safety tests in Japan, harmless to humans and pets
  • Applicable locations: Newly renovated homes, offices, rental property refurbishments, car interiors for formaldehyde removal, hotel rooms, children's rooms for formaldehyde removal, elderly rooms for "elderly odor" removal, pet activity areas for deodorization
  • Widely used in Japanese hotels and corporate offices, designated formula by Japanese professional home and car formaldehyde removal companies
  • This product uses the same formula, same concentration, and is produced by the same manufacturer as those used by professional formaldehyde removal companies; the only difference is the packaging redesigned for retail consumers
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