Polyester Structural Repair Putty - Marine Grade Long Strand Fiber Fiberglass Reinforced Filler for Boat and Automotive Repair

After I reinforced a hole in the hull with fiberglass and resin, there was still a low spot. I figured it would take forever to keep filling it in with resin, plus the resin is extremely runny so it is hard to get it to stay in the low spot. I came across this putty and out of the can it is extremely workable, not runny, does not sag and stay put. Even mixing in the liquid hardener does not effect it or make it runny. I applied it to the hull and it literally took one coat and evened the low spot out. I mean it goes on so smooth, and you have plenty of time to work with it before it starts to get tacky. The price is very fair compared to other stuff like Bondo which they say you don't want to use for these types of repairs. I have yet to sand it, but it is extremely hard and nothing an orbital sander can't handle. Hope this review helps as I was going back and forth on what fiberglass to use.

Works well. It's kinda like hard plastic when it cures.

Has title said? Make sure you're in a well validated area to allow the smells to dissipate. I use this to reinforce a deep bathing tub. It removed any side parl flex and reinforced the general form amazingly well. No problems with sag at thicknesses of about 1/4 of an inch. No need for fiberglass sheeting to help hold in place or for extra reinforcement damming. I just mixed like instructed and spread onto the unfinished underside to my desired shape and thickness and took the weekend to allow a full cure. I was using a plastic bag taped to my arm over top of a rubber glove to spread into the far away. Hard to reach crevices as the tub was already installed. At one point I tore the bag and glove and got a decent amount up inside against my skin. But the time I got through with the tight space I was working. I had quite the mess on my hand literally. With some elbow grease and some soap and warm water, I was able to remove all of the putty with only removing a few unfortunate hairs.

I love this putty. I use to fix dings, splits and cracks in the hull. It’s great for filling screw holes that were stripped and no longer able to mount hardware with screws. It doesn’t drip which makes it much easier to work with. The volatile organic compound odor is very intense. Definitely either wear a VOC filter mask or work in an area with a lot of ventilation. It is hard to sand precisely so try to avoid using excess material. If you need precise sanding, you’ll need a fairing coat.

This works great for what I need. A bit difficult in sanding it down a bit but works well in filling the gaps

I was fixing some holes in the boat and I’ve never actually used the polyester before. I usually use epoxy and personally in the future, I just will use epoxy and fiberglass. Nonetheless this does solidify well. This does appear very solid. I think it’s a good quality polyester, but I wouldn’t use it personally again.

Great Service and products

Worked great for making a piece that was missing on the rear wheel well on a 1966 corvette

Worked as expected.

Great product. Works as directed.