http://semproducts.com/product-catal...ible-sem-weld/
This stuff is used to repair plastic bumpers.
I have used SEM weld to repair holes / cracks in the shop floors here at work. The millwrights have used concrete vinyl repair in the same areas, SEM weld lays flatter while still remaining flexible (important in floors). SEM weld can also be sanded flat, which I did for our loaded pallet jacks constantly running over it .
You can probably locate some at the local auto body & paint store
