Bond-Hair long strand fiberglass reinforced filler features strands of chopped fiberglass up to 1 in long for extra strength on your toughest repairs: filling large rust holes, restoring shattered fiberglass and more. in fact, this waterproof filler delivers twice the strength of standard body filler, making it ideal for rebuilding missing pieces during full vehicle restoration. formulated to be twice as strong as regular body filler, bond Hair long strand fiberglass reinforced filler is suitable for your most challenging projects rebuilding missing pieces, vehicle restoration, shattered fiberglass repair, filling metal rust holes up to 1 in diameter and more. this filler features durable strands of chopped fiberglass up to 1 in long, eliminating the need for backing strips, mats or cloth. for repairs where even more strength is needed, these added materials can be easily used. the versatile filler is suitable for repairs on fiberglass, metal and wood. bond Hair long strand fiberglass reinforced filler is also very fast and easy to use. the filler comes with Bond red cream hardener for fast, easy mixing. its fast curing properties allow for sanding in as little as 20 min, keeping auto restoration projects on schedule. the cured filler is compatible with most fillers, primers and paints. even a small repair can seem complex at first. so 3M body repair system simplifies the entire automotive body repair process by dividing it into four stages - stage 1 - Prepare. this stage includes pulling dents, removal of paint and rust and efficient, effective masking of the area. stage 2 - Fill. this stage involves patching holes with reinforced filler and smoothing and shaping filler before painting. stage 3 - Paint. this stage includes painting the area and blending and smoothing primer and paint. stage 4 - Finish. the final stage for showroom grade results: removing small defects, sealing and polishing clear coats and other painted surfaces. 3M supplies premium products such as abrasives, tapes, body fillers and tools for every stage. this system helps you work easily, efficiently and successfully across the entire body repair process. as a brand of 3M, Bond is well known among collision repair professionals and others who are committed to helping you restore the beauty and value to your cars and boats. Bond bond Hair long strand fiberglass reinforced filler is another way that 3M applies science to life and helps you rediscover the excitement of the vehicles you own.