India's Shipbuilding Moment
Construction Chemicals for India's Shipbuilding Industry: A Complete Guide to Protective Coatings, Flooring & Waterproofing Solutions
India is targeting a place among the world's top 10 shipbuilding nations by 2030 and top 5 by 2047, supported by dedicated funding, new clusters like Porbandar, and state policies such as Gujarat's Shipbuilding and Repair Policy 2026.
As shipbuilding activity grows, one factor often gets overlooked: the materials protecting the vessel itself. Ships face relentless conditions like salt water, UV, abrasion, cargo chemicals, and temperature swings over decades with little room for downtime. That's why protective coatings, flooring, and waterproofing aren't finishing touches; they're mission-critical engineering inputs.
Why Shipbuilding Demands a Different Class of Materials
Unlike a building or a bridge, a ship is a moving structure that must perform in:
• Continuous or intermittent salt water immersion (hull, ballast tanks, submerged sections)
• High humidity and condensation inside enclosed compartments
• Biofouling exposure — algae, barnacles, and marine growth on submerged surfaces
• Mechanical abrasion and impact from cargo handling, anchor chains, and foot traffic
• Chemical exposure from cargo (petroleum, LPG, chemicals) and onboard operations
• Thermal cycling between engine rooms, cold cargo holds, and open decks
• Structural vibration from engines and wave action, which conventional rigid coatings can crack under
Marine-grade construction chemicals are formulated for flexibility, chemical resistance, adhesion under immersion, and long service intervals between dry-docking. Because dry-docking a vessel is enormously expensive, and materials that fail early translate directly into lost revenue for shipowners.
Understanding the Vessel Types and Their Material Needs
Cargo Vessels
Petroleum tankers, chemical carriers, LPG carriers, and bulk/pipeline-service vessels operate under a completely different set of demands: chemical-resistant tank linings, containment protection to prevent spillage or contamination, corrosion protection in cargo holds, and coatings engineered to handle constant contact with hydrocarbons, compressed gases, or aggressive chemicals. Any failure here isn't cosmetic, it's an environmental and safety risk.
Passenger and Leisure Vessels
Cruise ships, passenger ferries, yachts, and personal watercraft prioritise aesthetics, hygiene, slip resistance, and passenger safety alongside durability. Decorative and high-gloss flooring, anti-slip deck coatings, and odour-free, low-VOC systems are essential. These vessels are effectively floating hospitality spaces, and finish quality matters as much as protection.
Naval and Defence Vessels
These demand the highest specification protective systems — corrosion protection, anti-fouling performance, and coatings that support extended deployment without maintenance access, alongside compliance with defence procurement standards.
Zone-by-Zone: Where Each Product Category Fits on a Ship
1. Submerged Hull & Underwater Sections
The hull below the waterline faces constant salt water contact, hydrostatic pressure, and biofouling.
What's needed: salt-water resistant, algae- and marine-growth-resistant protective coatings; anti-corrosive primers and topcoats; polyurea and polyurethane protective coatings valued for their fast cure, seamless film, and abrasion resistance; injection grouting for hull and structural repairs during dry-docking.
2. Engine Rooms, Machinery Spaces & Technical Areas
High heat, oil spillage risk, vibration, and the need for chemical resistance define these zones.
What's needed: acid-resistant flooring, dielectric flooring for electrical safety in control and machinery spaces, antistatic flooring where sensitive equipment are present, and floor hardeners for high-traffic mechanical zones.
3. Ballast Tanks
A specialized compartment inside a ship, submarine, or other floating structure that holds water to control stability, buoyancy, and trim.
What's needed: anti-corrosive protective coatings and membrane/lining systems designed for steel surfaces, to prevent corrosion and leaks over the vessel's service life.
4. Cargo Tanks
Chemically aggressive spaces exposed to petroleum, chemicals, or other cargo, with limited access for repairs once in service.
What's needed: Containment protection lining for chemical/petroleum cargo tanks, and anticarbonation coatings where concrete elements are present.
5. Deck Areas
Decks must handle foot traffic, cargo handling equipment, weather exposure, and constant risk of slips in wet, salty conditions.
What's needed: anti-slip flooring/coating systems, water- and salt-resistant coatings, and durable topcoats that resist UV degradation and abrasion from mooring lines and equipment.
6. Passenger & Crew Areas
Interior living quarters, corridors require heavy-duty floor that combine long-lasting wear resistance with clean, modern aesthetics for daily foot traffic.
What's needed: decorative and terrazzo-style flooring for interiors and polyurethane hybrid flooring for durability with a premium look
7. Cargo Containers & Superstructure
Containers and above-deck superstructure face UV exposure, salt spray, and the need for a durable, presentable finish, particularly for vessels calling at multiple ports.
What's needed: high-gloss, corrosion-resistant coatings that hold colour and finish over years of sun and salt exposure, combined with anti-corrosive primers underneath.
8. Thermal Insulation & Fire Protection
Vessels that carrying flammable cargo require thermal insulation performance and passive fire protection.
What's needed: intumescent coatings that expand under heat to insulate structural steel and slow fire spread, alongside marine coatings rated for the thermal cycling ships experience between hot engine spaces and cold external decks.
Where Construction Chemicals Fit Across the Ship Lifecycle
Design Stage
Material selection begins at the design table. Naval architects and shipyard engineers need to specify protective coating and flooring systems that meet classification society standards (IMO, ABS, DNV, IRS, etc.) while balancing weight considerations. The specification should also match the vessel’s intended service life and route, as tropical, high-salinity waters require different protection than temperate zones. This is where technical data sheets, application guidance, and compliance documentation from the chemical manufacturer become part of the design process itself.
Manufacturing / New-Build Stage
During construction at the shipyard protective coatings and flooring are applied in a controlled sequence- surface preparation, primer, intermediate coats, and topcoats. Fast-curing polyurea and polyurethane systems are increasingly preferred here because they reduce coating downtime and keep new-build schedules on track, a critical factor as Indian yards compete on delivery timelines.
Repair, Retrofit & Overhaul (Dry-Docking)
This is where construction chemicals deliver the most value. Dry-docking is expensive, a out of service vessel is a direct cost to the shipowner. Rapid-curing injection grouts for structural repairs, fast-track re-coating systems, and durable flooring, all directly reduce vessel downtime and total cost of ownership. As India positions itself not just as a shipbuilding hub but also as a competitive ship repair and maintenance destination, this segment represents a significant and immediate opportunity for us.
Why This Matters for India's Shipbuilding Ambition
India's government has backed its shipbuilding push with a large financial package to build capacity, financing, and skilled manpower, alongside state-level initiatives like Gujarat's new shipbuilding parks and the upcoming Porbandar cluster. As new yards, ancillary units, and repair facilities scale up, the ecosystem needs a reliable domestic supply chain for specialised, marine-grade construction chemicals, reducing dependence on imported protective coating and flooring systems thereby supporting the broader Atmanirbhar Bharat vision for the maritime sector.
For Multichem, shipbuilding and ship repair is a natural next step. Our range already covers waterproofing, flooring, protective coatings, grouts, and much more. These systems are proven, chemical-resistant, and built to last in the toughest environments.
Explore Multicoat's range of protective coating, flooring, and waterproofing solutions engineered for the marine and shipbuilding industry:
● Submerged hull (underwater), Cargo containers & superstructure
Anti-corrosive primer: RustoBlock, Metaprime
Protective topcoat (corrosion resistant coating- polyurea/polyurethane): Seamate
● Deck, Above-deck / exposed steel
Marine coating (thermal cycling, Water, Corrosion & salt-resistant floor coating): Seamate
● Cargo tanks (petroleum/chemical/LPG)
Containment protection lining: EsterLine, Multipox, Multicoat
Chemical-resistant Flooring: Floorscreed EP(R)
● Engine room / machinery space
Acid-resistant flooring: Floorscreed EP(R)
Dielectric flooring: Electrogard
Antistatic flooring: Electroshield
Floor hardener: Floorhard
Heat, oil, fire risk: HeatShield (thermal), PyroShield/FireShield/MultiChar (fire protection)
● Piping, Exhaust, Boilers
High temperature (150°C–850°C): HeatShield
● Passenger/crew interiors
Decorative and Terrazzo-style flooring: MultiFlakes, MultiQuartz, Realcrete, Terrazzo Flooring
Polyurethane hybrid flooring: Floorthane
● Fire protection (flammable cargo vessels, Structural Steel, bulkheads)
Intumescent coating: Pyroshield, Multichar, Fireshield
Seamate Coating System
Anti-Corrosive Primer: MetaPrime or RustoBlock
Intermediate Epoxy Coat: Multipox
PU Finishing/ Top Coat: Multidur
Frequently Asked Questions
1: What coatings are used on the underwater section of a ship's hull?
Underwater hull sections typically use anti-corrosive primers combined with protective topcoats formulated to resist salt water, biofouling (algae and marine growth), and abrasion. Polyurea and polyurethane systems are widely used for their seamless, fast-curing performance.
2: What type of flooring is used in ship engine rooms?
Engine rooms commonly use acid-resistant and dielectric flooring systems that can withstand oil exposure, heat, and vibration while providing electrical safety in areas near machinery and control panels.
3: How do construction chemicals reduce dry-docking time?
Fast-curing injection grouts, rapid-recoat protective systems, and durable flooring reduce the time a vessel needs to spend out of service for repairs, directly lowering the cost of dry-docking for shipowners.
4: Is India becoming a global shipbuilding hub?
Yes. Backed by government policy frameworks (Maritime India Vision 2030 and Maritime Amrit Kaal Vision 2047), large financial packages, and new state-level shipbuilding clusters, India is targeting a place among the world's top shipbuilding nations by 2030 and 2047, capitalising on capacity constraints in traditional shipbuilding countries.