About BOSTIK SMARTFLEX PU(600ML)
91 000 74051 Bostik SmartFlex PU is a high-performance, low-modulus, one component polyurethane (PU) sealant. It cures to a permanently elastic, weather-resistant seal capable of 25% joint movement (50% total), making it ideal for both internal and external sealing joints. It offers excellent resistance against rain, sunlight, ozone, pollution and maintains durability without surface tackiness.
Key Features:Low modulus elastic sealant for expansion & connection joints. Movement capability: 25% of joint width (total 50%). Permanently elastic; resists weathering, UV, ozone & pollutants. Thixotropic: no sagging on vertical/overhead joints. Good extrusion force for narrow joints. Paintable over cured surface.
Q1. What is movement capability of SmartFlex PU It can handle 25% movement of the original joint width (total 50%) without failing.
Q2. Where can this sealant be used Good for joints in concrete, aluminium panels, fibre-cement sheets, windows, facade joints, plasterboard, and connection joints inside & outside.
Q3. How to apply it Clean joint surfaces (remove dust, grease). Use appropriate backing rod. Apply directly from sausage/cartridge using a PU gun. Tool the joint if needed. Ensure surface is dry. It will cure by moisture.
Q4. What about UV, weather, durability It resists sunlight, rain, ozone, environmental pollutants. It remains flexible, does not sag, and once cured, the surface is not tacky.
Q5. Is it paintable over after curing Yes, once fully cured, it accepts paint.
Q6. What is the shelf life & storage condition Usually 12-24 months when stored sealed, in dry and cool conditions. (Listings show Shelf Life, 12-24 Months.)
Q7. What is approximate price for 600 ml pack In Hyderabad, sellers list around 490 for 600 ml pack of the grey variant via Civiliz Mart. Prices may vary by color (grey/white), seller, and purchase quantity. Always confirm with supplier for the best offer.
Superior Flexibility and AdhesionBOSTIK SMARTFLEX PU offers impressive elongation at break above 500%, allowing it to accommodate joint movements effectively. Its excellent adhesion on construction materials-such as concrete, metal, glass, and wood-ensures lasting performance across diverse environments, including facades, precast panels, and expansion joints.
Easy to Use and Environmentally FriendlyWith a tooling window of 15-20 minutes and low odor, SMARTFLEX PU is convenient for contractors and safe for indoor and outdoor use. Its low VOC formulation adheres to green building standards, making it a responsible choice for sustainable construction and renovation projects.
Durability and Weather ResistanceThis polyurethane sealant resists shrinking, withstands temperature extremes from -40C to +80C, and maintains integrity against UV radiation. It performs reliably in harsh climates, making it suitable for Indian construction sites requiring longevity and minimal maintenance.
FAQ's of BOSTIK SMARTFLEX PU(600ML):
Q: How should BOSTIK SMARTFLEX PU be applied for optimal results?
A: BOSTIK SMARTFLEX PU should be applied to clean, dry, and dust-free surfaces. Using a standard caulking gun, extrude the sealant evenly into the joint or gap. Tool it within 15-20 minutes for a smooth finish and optimal adhesion. It is recommended to follow the manufacturer's guidelines for best results.
Q: What substrates is SMARTFLEX PU compatible with?
A: SMARTFLEX PU is compatible with a variety of construction substrates, including concrete, metal, glass, wood, and many more, making it versatile for numerous sealing and bonding applications in the building sector.
Q: When does the sealant begin to skin and fully cure?
A: SMARTFLEX PU begins to form a protective skin in approximately 60-90 minutes, given standard conditions (23C, 50% RH). The cure rate is around 3mm per 24 hours, with full curing depending on joint depth and ambient conditions.
Q: Where can SMARTFLEX PU be used in construction projects?
A: This sealant is suitable for use in construction joints, facade sealing, expansion joints, precast panel applications, and other standard construction uses. Its high flexibility and weather resistance make it ideal for both interior and exterior settings.
Q: What are the key benefits of using BOSTIK SMARTFLEX PU?
A: The major advantages include excellent flexibility, strong adhesion, weather and UV resistance, non-shrink properties, low odor, and compliance with green building guidelines due to its low VOC content.
Q: How should SMARTFLEX PU be stored and what is its shelf life?
A: Store unopened sausages in a cool, dry place, below 25C. The shelf life is up to 12 months when stored according to these recommendations.