ALKA product reference

ALKA 421

Two-Component Acrylic Polyurethane DTM SYSTEM

Alka-421 is A two-component high gloss white acrylic polyurethane topcoat formulated with hydroxyl acrylic resin technology for direct to metal application.

Alka-421 provides excellent adhesion to properly prepared metal, superior corrosion resistance, excellent gloss, weather resistance, hardness, chemical resistance and long-term durability.

Pack size: 10 Litre Kit

Overview

Usage

Structural Steel	Beams, columns, steel frameworks
Galvanized Surface Repairs	Touch-up and repair of damaged galvanizing
Welded Areas	Protection of weld joints and heat-affected zones
Pipelines	External steel pipeline protection
Storage Tanks	Maintenance coating for steel tanks
Industrial Equipment	Machinery, steel components, fabricated parts
Marine Environments	Coastal steel structures and marine equipment
Fences & Railings	Steel fencing, gates, guard rails
Transmission Towers	Utility poles, telecom, and power towers
Automotive & Transport	Chassis parts, trailers, truck bodies

Packaging

4 Litre, 20 Litre

Colour

White (High Gloss)

Product Details

Shelf life: 12 months

Storage conditions

Store away from direct sunlight and away from naked flames, sparks, and heating.

Flash point >25 C

Solid Content: 58-65 %

Application

Coverage
Approximately 8-9 m²/Kg at 50 microns DFT

Pot Life
3-4 hours

Dry Time
Touch dry in 30-45 minutes

Recoat time (at 25 C)
Re-coatable: 4-6 hours

Compatible System

Alka 4201 generally requires a separate primer such as Alka 404 (zinc-rich primers), and it might be used as a topcoat for Alka 413 (MIO Epoxy System).

Conventional spray
Airless spray
Brush or roller for small areas and touch-up work
Temperature: 10°C – 40°C
Relative Humidity: Below 85%
Thinner: Toluene / Xylene blend
Equipment cleaning: Same as thinner

CLEANING OF EQUIPMENT
Xylene can be used for cleaning tools and equipment before the mixed compound begins to harden. Once cured, it can only be removed mechanically.