Sikaflex® 221 Black, 300ML Paper Cartridge12/BX

Sikaflex-221 is a high-quality multi purpose non-sag 1-c polyurethane sealant that cures on exposure to atmospheric humidity to form a durable elastomer. Sikaflex-221 bonds well to a wide variety of substrates and is suitable for making permanent elastic seals of high adhesive strength. Suitable substrate materials are wood, metals, metal primers and paint coatings (2-c systems), ceramic materials and plastics.
• 1-C formulation • Elastic • Low odor • Resistant to weathering exposure • Non-corrosive • Can be overpainted • Can be sanded • Lower VOC’s • Bonds well to a wide variety of substrates • NSF registered, Proprietary Substances and Nonfood Compounds (black, gray, and white) • UL listed for potable water (black, gray, and white)
Cartridges: Pierce cartridge membrane. Unipacs: Place unipac in the application gun and snip off the closure clip. Cut off the tip of the nozzle to suit joint width and apply the sealant into the joint with a suitable hand operated or compressed air gun, taking care to avoid air entrapment. Once opened, packs should be used up within a relatively short time. Do not apply at temperatures below 41°F (5°C) or above 104°F (40° C). The optimum temperature for substrate and sealant is between 59°F (15°C) and 77°F (25°C). For advice on selecting and setting up a suitable pump system, as well as on the techniques of pump operated application
Surfaces must be clean, dry and free from all traces of grease, oil and dust. The substrates must be prepared in accordance with the instructions given in the current Sika Primer Chart.