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When used according to the manufacturer’s recommendations, Bondo takes 10 to 15 minutes to dry enough to form a sandable surface. After 45 minutes it’s cured enough to be painted.
How long before you can sand Bondo?
A Lot. There are two schools of thought on when to sand filler. If you are doing general bodywork, leveling wavy panels, fixing small dings, etc, then wait until the filler is fully cured, about 20-30 minutes.
Does Bondo harden without hardener?
Without it the bondo won’t get hard. Put a small piece of bondo on a board and run a line of hardener from end to end. It will take about five minutes to mix it up and apply it.
Can you leave Bondo overnight?
Don’t leave the body filler exposed if you’re driving the car. As you stated, shoot on some epoxy and apply the filler. After you’ve sanded, wipe it down and shoot some epoxy atop the body filler. That will allow you to leave it as is for a long time.
How long does body filler take to set?
(If you need to use shaping tools, this is the time to do it- while the putty is beginning to harden but isn’t yet dry.) Let dry completely (20-30 minutes).
Do you have to prime over Bondo?
Do You Need To Prime Bondo Before Painting? To help your top coats adhere to the metal, you should use a “direct to metal” primer (DTM), but it is not usually necessary under body filler. Once the metal is primed, you can apply a “filler primer” (2K) to hide scratches and minor surface scratches.
What grit sandpaper do I use for Bondo?
Make sure to sand outside of the repair area as Bondo will need to be spread and applied wider than the damaged area. (36-grit to 220-grit should do the trick for body filler application). AutoBodyNow.com sells a vast assortment of sandpapers and sanders to complete this step.
How long does it take for Bondo fiberglass to cure?
The two-part resin cures in 2 hours. It is also compatible with almost any paint system or gel coat. Bondo® All-Purpose Fiberglass Bondo® Fiberglass Resin Liquid Hardener is included with the resin.
Is Bondo waterproof?
Bondo Fiberglass Resins and Repair Kits are 100 percent waterproof. Because they do not shrink, they are excellent sealers. Bondo Fiberglass Resin is sandable in less than 2 hours, is compatible with all paints, and creates a strong and long-lasting bond.
Can you Wetsand Bondo?
Don’t wet sand filler. Filler is too absorbant and you can have problems getting it dry plus you could cause moisture to wick through to the metal or weaken the bond between the filler and the substrate.
Can you fix rotted wood with Bondo?
Once the surface is solid, hard wood and clean, you can apply the filler. Mix just the amount you can use in about 5 minutes. When using Bondo to repair wood rot, always wear gloves and work in a well-ventilated area.
How long for Bondo smell to go away?
Horrible Odor The odor does go away in about one to two hours after drying. The smell is probably the biggest negative about this product when used indoors.
Are body fillers strong?
We often get asked about metal body fillers or reinforced fillers and what they are. These fillers are incredibly strong but do have their place in the body shop. Not Just for Autobody Work- Metal Body Filler is a great alternative to other repairs other than auto body use.
How soon can you paint after Bondo?
Bondo mixed to the color swatch will begin to cure in less than 10 minutes at room temperature. Too much hardener in a warm environment will reduce working time, but too little in a cool environment can result in maddeningly long curing times.
Can you put body filler on Baremetal?
For small repairs, you can bog directly over the bare metal. If the repair is larger, or you’re looking for a longer-lasting job, apply a base coat of epoxy primer before laying on the filler.
Should you prime before body filler?
Do not proceed to Primer Filler stage until filled area is even. Adding body filler AFTER primer filler should be avoided to prevent possible adhesion, staining and shrinkage concerns.
How much hardener do you put in Bondo?
Mixing is the most vital step when using body filler. Plastic body filler needs the filler and a hardener mixed at the perfect ratio. The mix is crucial: 50:1.
How hard does Bondo cure?
When used according to the manufacturer’s recommendations, Bondo takes 10 to 15 minutes to dry enough to form a sandable surface. After 45 minutes it’s cured enough to be painted.
Will filler go off without hardener?
The resin which is included in wood filler prevents the hardening by itself without hardener. Once the resin will eventually run out and atmospheric oxygen will participate to harden the wood filler even without the hardener.
What removes Bondo?
Acetone will remove at least some fabric along with the embedded Bondo. It is important for the user to know the effect of the acetone on the fabric. Apply the acetone to a cleaning cloth and wipe the affected area thoroughly.
