ARONCOAT SQ is a waterproofing membrane for roofing that uses an acrylic rubber system with two reactive water-soluble ingredients.
In addition to the features of conventional membrane waterproofing, such as lightweight and seamless coverage of complex areas, ARONCOAT SQ delivers exceptional environmental performance and reliability.

ARONCOAT SQ is an eco-friendly waterproofing material.

ARONCOAT SQ is a solvent-free water-soluble waterproofing material that consists of ARONCOAT SQ Base, a cation-based acrylic rubber emulsion, and ARONCOAT SQ Setter, an inorganic curing agent. Because of its water-soluble composition, ARONCOAT SQ does not emit VOCs into the air. Furthermore, no flame is required, eliminating foul odors and dangerous fumes, Moreover, no noise or vibration is caused by its application.

ARONCOAT SQ Base comes in a containerboard package made primarily from recycled material to help reduce industrial waste.

ARONCOAT SQ can minimize the removal of existing waterproofing membrane at the time of improvement work.

ARONCOAT SQ can be used on a wide range of roof types and shapes, from pitched roofs to domed roofs, regardless of whether it is a new construction or an improvement project.

ARONCOAT SQ is suited for overlay applications where the existing waterproofing membrane is left in place.

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Use the adhesion method to increase cost performance when improving exposed sand asphalt waterproofing materials.

ARONCOAT SQ can easily be applied seamlessly to complex areas and shapes, delivering reliable waterproofing without the use of metal fittings or other hardware.

ARONCOAT SQ offers exceptional durability since its waterproofing membrane maintains the same performance more than 10 years after application. ARONCOAT SQ can also be applied in layers to restore its waterproofing performance.

Even if a flaw occurs, ARONCOAT SQ makes it possible to easily identify the location and make a simple partial repair.

ARONCOAT SQ's waterproofing membrane is light weight and has no impact on a building's load.
ARONCOAT SQ weighs less than 5 kg per square meter applied, including general base material treatment. This ensures any impact on a building's load is minimal.

Asphalt and sheets are commonly used to waterproof roof. In recent years, waterproofing by film coating in renovation work has become more common, while urethane rubber-based film coatings are known for being waterproof. However, urethane rubber has weak chemical bonding energy and easily deteriorates in physical properties; therefore, it requires continuous, proper maintenance of the top coat (reapplication every five to six years).
On the other hand, ARONCOAT SQ, which falls under the same category as film coating waterproofing, uses acrylic rubber film coating with waterproofing performance, high weatherability and durability. It has demonstrated in an actual on-site survey, where the film was sectioned off, its waterproof performance did not deteriorate after more than 10 years. Also, the technical inspection certification received from the Building Center of Japan confirms that the waterproofing performance of the product is the same as or higher than urethane rubber. It can be applied to various roof shapes, including pitched roofs and metal domes, and is suitable for covering existing waterproofing layers without removal during repair work. It is also ideal for exposed sand asphalt waterproofing and repairing asphalt shingle roofs.
Another consideration is that the material is completely water-soluble, which includes zero solvent from base repair material to top coat. As a result, no VOCs are released during application. As there is no emission of foul odor or smoke, and it produces minimal noise and vibration during application, ARONCOAT SQ has little impact on residents during repair work for multi-unit residential buildings. For the major repair project of Koriyama General Gymnasium , work was performed on areas damaged in the Great East Japan Earthquake as well as based on the Koriyama City-Kaiseizan District Urban Redevelopment Project. ARONCOAT SQ was selected for the overlay method since it produces less industrial waste from the roof. Instead of removing the entire existing roof covered in exposed sand asphalt waterproofing, only areas with deficiencies were repaired.
With steel plate roofs, even though folded plates and tiles can be used to reduce the load placed on the roof, they are constantly exposed to causes of corrosion as well as significant expansion and contraction due to temperature changes. This makes thin and hard rust-proof paints prone to cracking and peeling, which often become an area where rust starts to spread. Moreover, steel plate roofs make the indoor temperature rise quickly. With an application of ARON QD BOSEI COAT with heat-shield, which uses a rust-proof, waterproof acrylic rubber-based waterproofing material and a finishing coat with high solar reflectance, such challenges of steel plate roof can be addressed with generally 2 kg/m2 of coating, including underlay treatment, without increasing the load on the structure.

Toagosei conducts age-related degradation surveys on properties where its products were used in order to verify their performance. Let's take a look at one example.Kyushu and Okinawa are prone to typhoons and there have been many incidents of waterproofing sheets being blown away by strong wind. For this reason, there are high expectations among building designers for ARONCOAT SQ's adhesion method of waterproofing with a coating film. In order to validate the product's durability, surveys were conducted on site in Kyushu and Okinawa 13 to 16 years post application at a total of 6 locations, including exterior inspections. Also, a portion of the coating film was removed to examine the adhesive strength, crack coverage and change in fatigue resistance over time (2007). The result confirmed that ARONCOAT SQ withstood the harsh weather conditions of strong rain and wind and maintained its performance for 15 years without deterioration.
Typically, condominiums require large scale improvement work 13 years after construction, while roof waterproofing is also expected to be replaced at the same time. ARONCOAT SQ, which is capable of maintaining waterproofing performance for more than 13 years, is a superior waterproofing material from the life cycle cost perspective.

Measurements were taken by the Japan Paint Inspection Association in 2007. The zero span tension elongation was reduced by half compared to the initial coating, but the intact part and damaged protective layer were maintained at 4.1 mm and 2.4 mm, respectively.

ARONCOAT SQ followed cracks as big as 1.0 mm in width without fail and maintained excellent coverage of the movement of underlying cracks even after 15 years.