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Bonda Marine G.4 Primer-Sealer 500mL - £13.99
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A clear moisture cured polyurethane primer-sealer for wood, metal or cement/concrete. It forms a non-porous plastic coating which is tough and flexible with excellent adhesion to most materials including GRP. Use as a bonding primer when sheathing wooden or metalhulls with GRP or when adding fittings. A primer sealer for cast iron ballast keels prior to the application of anti-foulings. Proven by practical experience as a preventative treatment for blistered gelcoats on hulls. Seals wood and performs better than many varnishes (for high resistance to UV light degradation, on exterior surfaces, use Bonda Wood Seal).