POLYURETHANE JOINT SEALANT
Description
CORKJOINT J-Seal® PU1 is a one-component, gun grade, polyurethane joint sealant with high bond strength, which cures on absorption of atmospheric moisture to form a firm and flexible seal for moderate movement joints, construction joints and control joints in concrete and masonry structures. J-Seal® PU1 can be used in both horizontal and vertical applications.
Advantages
Fast cure, easy to apply, one component sealant. No mixing required
High strength performance with excellent elasticity and flexibility
Superior weatherability and no discolouration
Highly resilient with excellent recovery characteristics
Trafficable – Footpaths, stairs, pavements and floor slabs
Movement capability : 100% extension and 50% compression
Joint application width : 50mm maximum
Excellent adhesion to most building substrates
Stainability – Non-staining to most types of substrates: Low Volatile Organic Compound (VOC)
Able to be painted over by most types of paints, after one day of application
Tested and conforms to ASTM C-920 : 2018 standard specification for elastomeric joint sealants
Application
Construction and expansion joints in concrete slabs and walls
Precast concrete joints
Brick and masonry expansion joints
Perimeter caulking (windows, doors, aluminium frames)
Structural glazing & curtain wall joints
Parapet wall joints, floor and pavement joints
Repairing of concrete cracks (refer to minimum joint width requirements)
Bathroom and kitchen installations
Limitation
J-Seal® PU1 is not recommended for:
Overhead joints
Movement joints having Movement Accomodation Factor (MAF) > 50%
Damp and contaminated surfaces
Asphalt pavements or any material containing bitumen
Over painting with enamel or rigid paints (paint compatibility with sealant shall be checked prior to painting)
External application in white/off white will result in yellowing on exposure to UV
Use in chlorinated water such as swimming pools & spas
Immersion in water and salt water
Applied in joints wider than 50mm
Applied in joints less than 5mm in width and depth
Use for glazing applications
High and/or sharp point load
Colour
Grey
Light grey (Upon request)
Black (Upon request)
White (Upon request)
Packaging
600ml / ssg (20 ssg / box)
