BOSTIK SMARTFLEX POLYURETHANE SEALANT

About BOSTIK SMARTFLEX POLYURETHANE SEALANT

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 Weather Resistance

With elongation at break exceeding 400% and outstanding UV resistance, BOSTIK SMARTFLEX POLYURETHANE SEALANT remains durable and flexible in extreme conditions. Its non-sagging, paste-like texture ensures stable application for both horizontal and vertical joints, making it a reliable choice for demanding construction and precast concrete projects.


Efficient Application and Fast Curing

This advanced polyurethane sealant offers a tooling time of 20-30 minutes and skin formation in about 60 minutes at standard room conditions (23C, 50% RH). It cures at a rate of 2-3 mm per 24 hours, streamlining your workflow on site. Its smooth appearance and slight smell allow for comfortable and precise usage both indoors and outdoors.


Safe, Durable, and Environmentally Friendly

BOSTIK SMARTFLEX is designed to be low in VOCs and neutral in pH, ensuring safety during application. The sealant contains less than 1% water, is non-poisonous, and delivers long-term resilience from -40C to +80C. Its robust formulation meets construction grade standards for sealing joints, ensuring a strong bond and enhanced life span.