PU 523 - HIGH-PERFORMANCE SINGLE COMPONENT ADVANCED POLYURETHANE SEALANT

PU 523 High-Performance, Single Component, Advanced Polyurethane SealantDESCRIPTION
PU 523 is a single-component (moisture curing),
polyurethane joint sealant. The sealant has a +/-35% movement capability. It has good gunning, tooling and cure characteristics over a wide temperature and humidity range.BASIC USES • Under waterproofing membranes • Cast in place concrete • Precast panels • Brick and block work • General purpose perimeter caulkingCOLOURS White, Grey, and Black. Other colours are available upon request and subject to MOQ.PACKAGING 600 ml sausages – 20 per boxFEATURES & BENEFITS • No bubbling/blistering when cured under conditions of high temperature and humidity. • Excellent adhesion on a wide variety of substrates. • Excellent gunning, tooling and storage stability over a wide range of temperatures. • Good chemical resistance. • Can be overpainted with water based paints. Other types of paints should be discussed with tech service. However, paint is generally not as flexible as PU 523 and therefore the paint may crack and peel as a result of joint movementCOVERAGE 16 meters per 600 ml Sausage (6mm x 6mm) jointSHELF LIFE In the original unopened packaging the sealant has a 12 months shelf life from the date of manufacturingDIRECTIONS FOR USE• PU 523 is easy to apply with conventional caulking equipment. Ensure that the backer rod is fitted properly for friction and that any necessary primers have been applied.• Fill the joint completely with a proper widthto-depth ratio. Tool to ensure good contact with the substrate and the formation of a concave surface in the sealant bead.• Dry tooling is always preferred. But if necessary, compatible wetting agents can be used in limited amounts to slick the spatula after the initial pass. • For a cleaner finish, mask the sides of the joint with tape prior to filling.LIMITATIONS PU 523 is not recommended for: • Use in immersed water conditions • Contact with bitumen containing materials • Allow to fully cure before installation of nearby silicones.