Bonding chemistry · POLYURETHANE SEALANT
Polyurethane Sealant
Polyurethane is a moisture-cure elastomeric adhesive and sealant that bonds many substrates and stays flexible, strong, and abrasion resistant. It is paintable and well proven for joints that flex, in transport, automotive, and construction work. Some polyurethanes are ultraviolet sensitive and may need a primer on certain surfaces.
Products
MightyLoc Polyurethane Sealant products
How polyurethane cures
The one-part polyurethanes in this range cure by reacting with moisture from the air into a tough, flexible elastomer. Cure is affected by temperature and humidity, so in the warm, humid local climate the working time can be shorter, and it should be confirmed for the conditions. Polyurethane is isocyanate based, so normal handling care applies, with protective-equipment guidance on the safety data sheet. Confirm the working window on the product Technical Data Sheet.
Where it fits
Polyurethane suits elastic bonding and sealing of joints that flex, where mechanical toughness and abrasion resistance matter, in transport, automotive, and construction. It is paintable and bonds many substrates, though some grades are ultraviolet sensitive and may need a primer on certain surfaces. The MightyLoc range includes Taftflex 6221 and Taftflex 6292. Confirm substrate suitability and any primer on each product Technical Data Sheet.
Verified figures
Within the range, Taftflex 6221 has a tear strength greater than 10 N per mm, and Taftflex 6292 has a tensile strength greater than 0.25 MPa. Taftflex 6292 carries an average rating for water and salt-spray resistance, so it is not presented as a marine or immersion product. Read one grade's figures only for that grade, and confirm every value on its Technical Data Sheet.
FAQ · POLYURETHANE SEALANT
Questions about Polyurethane Sealant.
Polyurethane is used for elastic bonding and sealing of joints that flex, where toughness and abrasion resistance matter, in transport, automotive, and construction. It bonds many substrates and stays flexible. Confirm the application and substrate suitability on the product Technical Data Sheet.
Some polyurethanes need a primer on certain surfaces, and some grades are ultraviolet sensitive. Whether a primer is needed depends on the substrate and grade, so confirm the requirement on the product Technical Data Sheet before application.
MightyLoc makes no marine or immersion claim for the Taftflex range. Taftflex 6292 carries only an average rating for water and salt-spray resistance. For any wet or immersed service, confirm suitability with MightyLoc and on the product Technical Data Sheet first.
Polyurethane is strong and abrasion resistant but isocyanate based and sometimes ultraviolet sensitive, while MS polymer is low-hazard, paintable, primerless on many substrates, and weather stable. The related guide below sets them side by side for tropical and outdoor joints. Confirm the right choice on the product Technical Data Sheet.