Sikaflex 291 Marine Adhesive Sealant – 300 ml

From £16.48£19.78

SKU: CONF_4971

PU-based marine sealant: a professional alternative to marine silicone sealant, CT1 and 3M 5200
Suitable for use above and below the waterline
Resists salt water, UV and weathering
Fast strength build-up with excellent bond strength
Paintable and sandable once cured
Can be squeezed or brushed into place
Available in Black or White, 300ml cartridge

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Sikaflex 291 is the industry-standard polyurethane marine adhesive sealant, specified by boat builders, marine engineers and vessel owners across the UK for sealing and bonding applications above and below the waterline. It's a direct, high-performance alternative to traditional marine silicone sealant, with substantially stronger bond strength and proven saltwater resistance, and a common cross-shop for buyers weighing up CT1 marine sealant or 3M 5200 for hull fittings, deck hardware bedding, and through-hull installations. Designed for a wide range of marine applications, Sikaflex 291 is paintable, sandable, and offers fast strength build-up after application, allowing work to progress quickly. It may be squeezed or brushed into place depending on the joint, and remains stable under the combined stresses of salt water, UV exposure and mechanical movement. Typical uses include hull-to-deck joints, porthole and window bedding, fitting seals, and general repair work where a durable elastic bond is required. Available in both black and white in 300ml cartridges, Sikaflex 291 gives professionals a colour-matched option for visible and concealed applications alike. For experienced professional use, always test on original substrates and follow Sika's technical data sheet for cure times and substrate preparation.

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