100% Silicone
Impy's pick
Best for flat / low-slope & ponding
A moisture-cure silicone membrane — the premium system for Caribbean sun and standing water.
Pros
Shrugs off ponding water
UV-stable, won't chalk
Highly reflective (cool roof)
Long life, easy silicone recoats
Cons
Higher upfront cost
Slippery when wet; holds dirt
Only silicone bonds to it later
Urethane
Best for decks & foot traffic
A tough polyurethane coating built to take impact and abrasion — often a base coat with an aliphatic topcoat.
Pros
Excellent impact & abrasion resistance
Handles foot traffic and walkways
Strong adhesion, tough film
Cons
Fussier, moisture-sensitive cure
Aromatic type yellows without a topcoat
Higher odour/VOC; pricier to apply
Acrylic
Best for sloped roofs / budget
A water-based, economical reflective coating — a solid value on roofs that drain quickly.
Pros
Economical, easy water-based application
Good reflectivity, low odour
Recoats simply
Cons
Re-emulsifies under ponding water
Thins and erodes over time
Not for flat, standing-water roofs
Elastomeric
Best for cracking / moving substrates
A thick, stretchy rubberised membrane that bridges hairline cracks and thermal movement.
Pros
High elongation bridges cracks
Reflective, decent value
Flexes with the roof
Cons
Many struggle with prolonged ponding
Can trap moisture if misapplied
Recoats sooner than silicone