Polyurethane vs Epoxy Coating in Ghana — Which Do You Need? (2026)
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Polyurethane vs Epoxy — Different Jobs, Not Competitors
Epoxy cures hard, bonds superbly and resists chemicals — but has almost no flexibility and breaks down in UV. Polyurethane cures flexible, stretches over 200%, and is UV-stable. For anything on a Ghanaian roof, the answer is polyurethane. For an interior workshop floor, it is epoxy.
They are frequently sold interchangeably in Ghana. They are not interchangeable.
Head to Head
| Property | Polyurethane | Epoxy |
|---|---|---|
| Elongation | 200%+ | 2–5% |
| UV stability | ✅ Stable | ❌ Chalks, yellows |
| Crack bridging | ✅ Yes | ❌ No |
| Hardness / abrasion | Good | ✅ Excellent |
| Chemical resistance | Good | ✅ Excellent |
| Adhesion to concrete | Good | ✅ Excellent |
| Tolerates damp substrate | Moderate | Some grades yes |
| Outdoor use in Ghana | ✅ Designed for it | ❌ Fails |
| Component count | 1 or 2 | Always 2, must be mixed |
The Two Numbers That Decide It
Elongation: 200% vs 3%. Concrete in Ghana moves every single day — a 20°C swing between afternoon heat and night. Polyurethane stretches with it. Epoxy cannot; it simply cracks along the movement line.
UV stability. Ghana sits at UV index 11+ for most of the year. Epoxy's molecular backbone breaks down under UV. It first chalks to a powdery surface, then yellows, then embrittles. This is not a quality issue — it is what epoxy does outdoors, regardless of price or brand.
Use Epoxy For
- ✅ Interior industrial and workshop floors
- ✅ Warehouse floors under forklift traffic
- ✅ Chemical bunds and containment areas
- ✅ Food-processing and laboratory floors
- ✅ Priming contaminated or oil-stained concrete
- ✅ Interior tank linings for aggressive chemicals
Use Polyurethane For
- ✅ Concrete flat roofs and terraces
- ✅ Parapet walls and roof upstands
- ✅ Box gutters
- ✅ Balconies and walkways
- ✅ Water tanks and reservoirs
- ✅ Bathrooms and wet areas beneath tiles
- ✅ Anything exposed to sunlight or thermal movement
The Hybrid Specification
On industrial projects the two are often combined deliberately:
- Epoxy primer — for its adhesion to difficult or contaminated concrete
- Epoxy build coat — where mechanical strength is needed
- Polyurethane top coat — for UV stability and flexibility
You get epoxy's bond and polyurethane's weather resistance. Common on plant rooms, external stair cores and exposed industrial decks.
The Mistake We See in Ghana
Epoxy floor paint sold as a roof coating. It is cheaper per litre, looks impressive when applied — hard, glossy, tough — and fails within one dry season. The gloss goes matt, the surface chalks white, and the first thermal cycle cracks it along every hairline in the slab.
If a supplier offers epoxy for your roof, ask two questions: what is the elongation, and is it UV-stable. The answers will end the conversation.
What We Supply
Fest Ghana Limited supplies single-component polyurethane waterproof coating for roofs and exposed surfaces — 5kg GHS 500 and 10kg GHS 1,000. GSA-certified, with a 3-year manufacturer material warranty, a 3-year workmanship warranty on installation, and a 20-year design life.
Quantity: budget roughly 0.4 kg per m² for a two-coat system — a 100 m² roof needs about 40 kg, or four 10kg buckets. Coverage on a bucket is quoted per coat, so halve it before ordering.
For industrial floors requiring epoxy, we specify and install the correct system for the exposure.
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