Description

PU 521 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.

Characteristic

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

Typical Data

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 521don't need mixing and use directly.

Spreading

Spread PU 521 on base material with enough pressure and thickness not less than 1 millimeter.

Note

Full cure (dry 7 days under 20) for PU 521 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 521 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 521 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.