ALEXSEAL Waterborne Topcoat - Technical Data Sheet - Mixing, Coverage, Application and Drying

Nov 1, 2026

Uploaded by Tirek

ALEXSEAL Waterborne Topcoat is a water-reducible, two-component polyurethane system designed for high-gloss retention and strong color resistance in harsh climates. The cured film resists abrasion, scratching, solvents, chemicals, synthetic cooling agents, and hydraulic oils. It is approved by IMO Resolution MSC.307(88) (FTP-Code 2010) for marine use with low flame-spread characteristics. Guidance covers application areas, surface preparation, available color, coverage rates, mixing ratios, equipment nozzles, spray/brush film build, viscosity targets, pot life, and drying/recoat times under specified temperature and humidity conditions.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages2

Reading Time5 min

AccessFree to download

Introduction

Range of application

Color

Coverage Volume Solids

Substrate pre-treatment

Trade names & packaging

Mixing ratio

Application viscosity

Application

Pot life and drying

1. Introduction ALEXSEAL Waterborne Topcoat is a water reducible two component paint based on polyurethane technology.After curing, the material is characterized by a high gloss retention and color resistance even under extreme climatic conditions. Moreover, the cured film is resistant to abrasion, scratching, solvents, chemicals, synthetic cooling agents and hydraulic oils. ALEXSEAL Waterborne Topcoat has been approved by IMO Resolution MSC.307 (88)-(FTPCode 2010) as marine paint with low flame-spread characteristics. ALEXSEAL Waterborne Topcoat has been approved by IMO Resolution MSC.307 (88)-(FTP-Code 2010) as marine paint with low flame-spread characteristics. 2. Range of application ALEXSEAL Waterborne Topcoat is used in engine rooms and lockers for example. The material should not be used directly on the engines as the heat may cause gloss and color changes. However, this does not affect the film´s protective properties. 3. Color ALEXSEAL Waterborne Topcoat is available in white standard factory packaged only. 4. Coverage Volume Solids catalyzed without reduction: 46 % . Coverage for ALEXSEAL Waterborne Topcoat when applying 2 coats. Note: Coverage rates are figured for base and converter. Reducer is added as percent of total quantity of base & converter | . | m² /
liter | m² /
gal | sq. ft. / gal | Rec. DFT in µm (mils) | | --- | --- | --- | --- | --- | | Theoretical / Brush and Roller | 12 | 45 | 484 | 40-50 (2) | | Practical | | | | | | Conventional Air Spray Equipment | 7.2 | 27.2 | 293 | 40-50 (2) | | HVLP Air Spray Equipment | 8.4 | 31.7 | 342 | 40-50 (2) | 5. Substrate pre-treatment The substrate must be clean, dry and free from dust and grease. Due to its good adhesion properties ALEXSEAL Waterborne Topcoat may be applied directly to fiberglass. 6. Trade names & W ALEXSEAL Waterborne Topcoat (Base Color) 1 Gal Packaging C9929 ALEXSEAL Waterborne Topcoat Converter 1 QT 7. Mixing ratio 4 parts by volume W ALEXSEAL Waterborne Topcoat (Base Color) Spray: 1 part by volume C9929 ALEXSEAL Waterborne Topcoat Converter 10-15 % by volume Distilled Water Example: 4 : 1 : 1/2 to 3/4 = 20 % reduction Brush / Rolling: 4 parts by volume W ALEXSEAL Waterborne Topcoat (Base Color) 1 part by volume C9929 ALEXSEAL Waterborne Topcoat Converter 5-10 % by volume Distilled Water Example: 4 : 1 : ¼ up to 1/2 = 5-10 % reduction The amount of reducer required may vary depending on the application conditions. Mixed material must be filtered before application. Mix ALEXSEAL Waterborne Topcoat Base and ALEXSEAL Waterborne Topcoat Converter with a high-speed mixer for approximately 2 minutes. After this, adjust the application viscosity by adding water. 8. Application Viscosity Zahn \#2: ≈ 37-50 sec, DIN 4 cup 4mm: ≈ 30-40 sec Nozzle Size Gravity Gun 1.0 to 1.4 mm (0 .040 to 0 .050) -Conventional & HVLP Nozzle Size Siphon Cup 1.2 to 1.6 mm (0.046 to 0 .060) -Conventional & HVLP Fluid Nozzle Size Pressure Pot 1.0 to 1.2 mm (0.040 to 0.042) -Conventional & HVLP Atomizing Pressure 3.0 to 3.5 bar (42 to 50 PSI) -Conventional & HVLP Pot Pressure 0.7 to 1.5 bar (10 to 20 PSI) -Conventional & HVLP Application by Spraying: Apply 2 coats to a wet film thickness (WFT) of 30-40 microns (1 .1 – 1.6 mils) per coat. Allow 60 minutes flash time between coats. This will achieve a dry film thickness (DFT) of 30 - 40 microns (1 .2-1.6 mils) for a 2 coat application. Maximum recommended film thickness during a spray application is 2 coats totalling 60 -80 microns (2 .5-3 mils) WFT, or 30 -40 microns (1 .2-1.6 mils) DFT. Application by Brush / Roller:Apply 2 coats to a wet film thickness (WFT) of 30-40 microns (1 .1 – 1.6 mils) per coat. Each coat should dry to a tape dry stage, 12 -24 hrs. Sand with 320-400 between coats. This will achieve a dry film thickness (DFT) of 30 -40 microns (1 .2-1.6 mils) for a 2 coat application. Maximum recommended film thickness during an application is 2 coats totalling

FAQs

What are the key performance properties of ALEXSEAL Waterborne Topcoat after curing?

After curing, it offers high gloss retention and strong color resistance under extreme climatic conditions, with resistance to abrasion, scratching, solvents, chemicals, synthetic cooling agents, and hydraulic oils.

Where is the coating intended to be used, and what is a critical limitation during application?

It is used in engine rooms and lockers. It should not be used directly on engines because heat may cause gloss and color changes, though protective film properties remain unaffected.

What mixing ratio and thinning limits are specified for the product?

The ratio is 4 parts base color to 1 part converter by volume, with 10–15% distilled water added (example ranges shown). Mixed material must be filtered before application, and viscosity is adjusted with water after mixing.

Nov 1, 2026

Uploaded by Tirek