KATER 521

KATER 521
Low Modulus Polyurethane Sealant for Construction

Description
PU sealant KATER521 is one-part room temperature moisture curing polyurethane with high adhesion strength, aging resistant, vibration exhaustion resistant, low temperature resistant and free-corrosive properties.

Where to use
Seal for building wall and cover board, frame joint, window seal (inside & outside), water proof joint (inside & outside), water tank and water drainage structural joint, parapet and road separating joint and general civil project expansion and contraction joint.

Characteristics of PU Sealant
Medium curing speed Good adhesion strength
Repairable Good chemical corrosion resistance
Good water proof Paint able
One part no mixing Excellent weather proof, aging resistant property
Abrasion able Excellent noise, vibration and Impaction resistant
Damp resistant No sagging
Anti mildew

Packaging
310ml aluminum cartridge, 300ml, 400ml and 600ml sausage. 250kgs bulk by drum.

Storage
At 5~25 centigrade shady, dry place, 12 months of shelf life.

Technical Service
Full support for customer in Technology

Application
Surface preparation
Clean all dirty, dust, loose particles by steel brush and clean all oily things with cleaning agent. All former adhesive must be cleaned out by scraping, paring, friction, jet of strong air or suitable ways.
Priming
Commonly no need for primer. Primer could be recommended in order for best performance. If using primer, smooth priming base and no permitting primer clump and uniformly disperse to prevent any coating cumulus.
Mixture
PU sealant doesn't need mixing and use directly.
Spreading
Spread PU KATER 521 on base material with enough pressure and thickness not less than 1 millimeter.

Note
Full cure (dry 7 days under 20℃) for PU sealant should be finished before applied place permits water entering into. The adhesive surface could be painted but no recommendation for colorful enamel. If should be used, please do in site testing to prove compatibility.
No permission for wet spreading tech. NO recommendation solvent, water, cleaner or soap solution.
No permission for high chloride content disinfected area like swimming pool before consulting Kater's technician.
Application temperature between 5 ℃ and 35 ℃.

Paint Able Propery
PU sealant could be painted after dry with traditional method like epoxy or acrylic paints. The adhesive surface will take place reaction and soften if using high solvent content coating like luster enamel or high oily base coatings.
Coating should have similar tensile strength compared with adhesive in order to get best appearance and property. Painting could be processed after 24 hours if thickness of adhesive is less than 3 mm while painted after 48 hours if thickness more than 3mm.

Anti Fire
PU sealant is not easy inflammable.

Health and safty
No contact with eye or skin. Please contact doctor or poisoning preventing center in case of poisoning. If contact with skin, clean thoroughly 15 minutes long or look for doctor.