Neogel 8373-W-9742 is an iso/Neopentylglycol (iso-NPG) gelcoat from AOC, pre-accelerated and thixotropic, developed especially for boat building, swimming pools, sanitary ware, and furniture that require good weatherability. It is ready for use and available in spray and brush types, with a combination of easy application, good blister resistance, and excellent weathering performance. This page summarizes the technical and safety data published in the manufacturer’s Technical Data Sheet and Safety Data Sheet.
What Is Neogel 8373-W-9742?
Neogel 8373-W-9742 is an iso-NPG unsaturated polyester gelcoat that combines several important characteristics: easy application, good resistance to long water immersion (good blister resistance), excellent weatherability with less yellowing, good air release, and good mechanical properties. It conforms to USA ANSI-Z-124-1 and is approved by DNV Italia and Italian RINA.
It is supplied in the following standard types, with additional paraffinated versions available on request:
- Spray type – Neogel 8373-W-9742
- Brush type – Neogel 8373-W-9742 H
- Spray (Paraffinated) and Brush (Paraffinated) versions on request
Technical Specifications of Neogel 8373-W-9742
The table below summarizes the base gelcoat and cured product properties as published in the manufacturer’s Technical Data Sheet (Version 1.0, 2020.12.29).
| Property | Brush Type | Spray Type |
|---|---|---|
| Appearance | Thixotropic liquid | Thixotropic liquid |
| Viscosity @25℃ (#4, rpm2) | 35,000–60,000 mPa.s | 21,000–40,000 mPa.s |
| Viscosity @25℃ (#4, rpm20) | 5,700–7,300 mPa.s | 3,500–5,200 mPa.s |
| Gel time @25℃ | 12–18 min | 8–15 min |
| Barcol hardness (cured) | 40–45 | 40–45 |
| Tensile strength (cured) | 50±5 MPa | 50±5 MPa |
| Water absorption (ASTM D 570) | <11 mg | <12 mg |
Physical and Chemical Properties
According to the Safety Data Sheet, the physical and chemical properties of this gelcoat are as follows:
- Physical state: Liquid; Color: White; Odor: Typical
- Flash point: 33℃ closed cup (SDS); >21℃ per Technical Data Sheet
- Density: 1.15 g/cm³ at 23℃
- Boiling point: 145℃; Auto-ignition temperature: 490℃
- Viscosity (dynamic, room temperature): 6,000–10,000 mPa·s
- Solubility: Insoluble in cold and hot water
The main ingredients listed in Section 3 of the Safety Data Sheet are styrene (CAS 100-42-5, 25–50%), titanium dioxide (CAS 13463-67-7, 5–10%), and talc (CAS 14807-96-6, 5–10%).
Application Guidelines for Neogel 8373-W-9742
The spray type of Neogel 8373-W-9742 can be applied with conventional spray equipment using these recommended settings:
- Spray gun: nozzle diameter 2.0–3.5 mm, pressure 4–5 bar
- Airless equipment: nozzle types 18/40–21/40
- Application temperature: 18℃ to 25℃
- Curing agent: MEKP (Butanox M50), dosage 1.0%–2.5%
- Recommended film thickness: 600–800 g/m²
Spray type is generally recommended for large surface areas and production runs using spray or airless equipment. Brush type is suited to touch-ups, small parts, or manual application where spray equipment isn’t practical. Paraffinated versions are recommended when the gelcoat will cure in open air, since the paraffin film reduces surface tackiness during cure.
Packaging and Storage for Neogel 8373-W-9742
It is available in approximately 22 kg packaging. It should be stored in its original closed packaging at a temperature not exceeding 20℃, out of direct sunlight and away from direct heat sources. Under these conditions, the product has a stability of 3 months from dispatch date; AFAST versions or black and dark green/blue colors have a stability of 2 months from dispatch date. This gelcoat has a flash point above 21℃ per the Technical Data Sheet and is flammable, so it should be kept away from naked flames.
Safety Information for Neogel 8373-W-9742
Per its Safety Data Sheet, this gelcoat carries a GHS Danger signal word, with classifications including Flammable Liquids Category 3, Acute Toxicity (Inhalation) Category 4, Skin Corrosion/Irritation Category 2, Serious Eye Damage/Eye Irritation Category 2A, Carcinogenicity Category 2, Toxic to Reproduction Category 2, Specific Target Organ Toxicity (Repeated Exposure) Category 1, and Acute/Long-Term Aquatic Hazard. Recommended gloves include fluor rubber (Viton, 0.70 mm, greater than 8 hours breakthrough time) or chloroprene/nitrile rubber for shorter exposure, plus safety glasses with side shields and a chemical-resistant protective suit. Buyers and users should obtain and review the full Safety Data Sheet before handling.
Sourcing Neogel 8373-W-9742 Through chemicalsstore.com
Boat builders, pool manufacturers, and composite fabricators sourcing gelcoat products such as Neogel 8373-W-9742 can contact chemicalsstore.com for current availability, supply chain resource support, and coordination on order volumes, lead times, and documentation requests, including the manufacturer’s Technical Data Sheet, Safety Data Sheet, and Certificate of Analysis.
Frequently Asked Questions About Neogel 8373-W-9742
What is the gel time?
At 25℃, gel time is 8–15 minutes for the spray type and 12–18 minutes for the brush type, as published in the manufacturer’s Technical Data Sheet.
What packaging is available?
It is available in approximately 22 kg packaging. Contact our team with your target order volume for details on minimum order quantities.
How should it be stored?
Store it in its original closed packaging at a temperature not exceeding 20℃, out of direct sunlight and away from direct heat sources, for a stability of up to 3 months from dispatch date.
Is it a hazardous material?
Yes. According to its Safety Data Sheet, it carries a GHS Danger signal word, including flammable liquid, harmful if inhaled, skin and eye irritation, and carcinogenicity and reproductive toxicity hazard classifications. Review the full SDS before handling.
Can you provide COA and SDS?
Yes, a Certificate of Analysis and Safety Data Sheet are available on request for each batch.
Need bulk supply, COA/SDS, or help selecting the right grade? Contact our team for a quote and technical support.
