This fiberglass-reinforced polyester putty combines high mechanical strength with flexibility, reducing cracking risk on large areas. It adheres well to multiple substrates, which makes it ideal for filling voids and reinforcing corroded car parts. The putty is easy to apply and sand, starting with P120 grit paper. - specific weight: 1.23 kg/L - high mechanical strength while maintaining good flexibility - excellent sanding, beginning with P120 - easy mixing of the hardener