Sika Sikaflex-522 black polyurethane sealant, 300 ml cartridge. Elastic, UV-resistant, bonds concrete, brick, wood, glass, and stone for interior and exterior joints.
Sika Sikaflex-522 is a single-component polyurethane sealant designed for bonding and sealing a wide range of building and construction substrates. The black formulation provides excellent UV resistance and maintains its elasticity across a broad temperature range.
Adheres to concrete, brick, stone, wood, glass, and most common building materials without primer
Remains permanently elastic — accommodates building movement and thermal expansion without cracking
Weather-resistant seal suitable for both interior and exterior applications
300 ml cartridge format enables precise, controlled application in narrow joints and seams
What makes Sikaflex-522 stand out
Unlike rigid sealants that lose flexibility over time, Sikaflex-522 stays elastic for the life of the joint. The black pigment shields the sealant from UV degradation, making it reliable for exposed outdoor use where lighter colours would yellow or deteriorate faster.
Ideal for
Construction professionals and DIY installers working on masonry joints, window perimeters, roof edges, and expansion joints in concrete and timber frames. The product suits renovation projects where a durable, paintable seal is needed on non-porous and porous substrates alike.
Application of Sikaflex-522
Clean the joint surfaces thoroughly — remove dust, grease, and loose particles
Apply a continuous bead into the prepared joint using the 300 ml cartridge
Tool the sealant smooth with a spatula or finger to ensure full contact on both sides
Allow to skin over and cure fully — movement capability is available immediately after application
Sika is a Swiss specialty chemicals company with over a century of experience in adhesives, sealants, and construction chemicals. The brand supplies professional and trade users with products engineered for durability and performance in demanding building environments.
Sikaflex-522 is a polyurethane sealant used for bonding and sealing joints in building construction — including masonry, concrete, timber, glass, and brick substrates, both indoors and outdoors.
It adheres to concrete, brick, stone, wood, glass, and most common building materials without requiring a primer. Always check compatibility on porous or heavily textured surfaces before full application.
Product type: polyurethane sealant. Colour: black. Volume: 300 ml cartridge. Weight: 0.416 kg. No warranty period specified by the manufacturer for this product line.
One 300 ml cartridge of Sika Sikaflex-522 black sealant. The cartridge is ready for use with a standard caulking gun.
Store the unopened cartridge in a cool, dry place away from direct sunlight. Keep the temperature above freezing. Once opened, use the remaining sealant promptly to prevent skinning.
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