Makes ?Fast Cure? Even Faster
3M empowers its customers by designing the solutions that bring optimal performance to their everyday applications. We designed 3Mâ„¢ Polyurethane Adhesive Sealant Accelerator AC63 for large applications where adhesive strength and cure time are factors. When this adhesive accelerator is combined with an adhesive in a two-part adhesive system, it is capable of reaching full strength in a fraction of the time it takes conventional, single-part polyurethane adhesives. Consistent, guaranteed cure rates can be achieved in less than an hour, while a tack-free state can be achieved within 15 (+/-5) minutes.
A Different Kind of Cure
With a curing process unlike that of the single-part polyurethane adhesives on the market, our two-part accelerated polyurethane mixture of 3Mâ„¢ Polyurethane Adhesive Sealant Accelerator AC63 and 3Mâ„¢ Polyurethane Adhesive Sealant 550 is capable of curing due to a chemical process as well as a moisture-based process. This process actually cures the adhesive from the inside out, resulting in a more consistent cure that reaches full strength in a fraction of the time. No exothermic reaction takes place, no priming is required (for most applications), and the adhesive mixture does not stain.

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3M 34577, Cubitron II Net Sheet Roll, 240+, 115 mm x 10 m, 7100247504, 6 Rolls/Case
ACS Diamond Cloth Belt, CX1250 1/2" X 18" 125U
Insize 4142-200, GRANITE SQUARE WITH V GROOVE, 7.9x7.9x7.9", 6928640375538
Dynabrade 51301 .5 hp Straight-Line Die Grinder
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Standard Abrasives 717078, Cartridge Roll Mandrel, 3/32 in x 3/4 in x 1/4 in x 1 in x 2-3/4 in CM-2E, 7000121813
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3M 06742, Overspray Protective Sheeting, 20 ft x 250 ft, 7000120043
3M 05519, Sanding Block, Rubber, 2-3/4 in x 5 in, 7000000587 
