- Marine & Exterior
- Primer
- SeaGuard Marine
SeaGuard Marine Boat Primer
4.7 from 3 customer reviews£32.00
inc. VATSKU: seaguard-marine-boat-primer
Multi-purpose polyurethane marine primer undercoat — hull metal, GRP or timber, above or below the waterline. Always required before a marine topcoat on bare substrate. Coverage: 9 m²/L per coat (approx.).
Key specs at a glance
- Substrate
- fibreglass-GRP
- Colour system
- fixed-colour-range
- Role
- Primer
Free UK delivery over £60 · Free 30-day returns
Order by 2pm — estimated delivery Fri 18 Sept
Not sure it's the right one for your job? Read our paint help guide — substrate, condition and application explained.
About this product
Multi-purpose polyurethane marine primer undercoat — hull metal, GRP or timber, above or below the waterline. Always required before a marine topcoat on bare substrate.
Technical specification
- Role
- Primer
- Substrate
- fibreglass-GRP
- Colour system
- fixed-colour-range
- Category
- Marine & Exterior
- Brand
- SeaGuard Marine
- Application method
- brush, roller
- Pack sizes
- 1L
Where this fits in the prep sequence
- Bare or corroded substrateRequired before a topcoat
- Sound, previously painted surfaceOptional — improves adhesion
- Used as a standalone finishNot designed for this
Is the SeaGuard Marine Boat Primer right for your job?
The SeaGuard Marine Boat Primer is a primer built for fibreglass-grp.
This product suits you if
- You're painting fibreglass-grp
- The substrate is bare, new, or showing corrosion
Check before you buy if
- You want a one-coat primer+finish — a 3-in-1 product will be faster
Application — how does it go on?
- Role
- Primer
- Application method
- brush, roller
Suitable for brush, roller application — pick whichever suits the size of the job.
— The Paint Guys prep note, based on 3 customer reviews
Customer reviews
Applied the SeaGuard Marine Boat Primer to the GRP hull before relaunch — smooth finish, good grip once cured.
Sam T.
Verified purchase · 5 Sept 2026
The SeaGuard Marine Boat Primer has been below the waterline on our hull for a full season with no blistering.
Beth C.
Verified purchase · 27 Aug 2026
UV-resistant topsides finish that’s actually held its colour — the SeaGuard Marine Boat Primer hasn’t chalked like our old paint.
Yusuf K.
Verified purchase · 18 Aug 2026
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