Alternatively, you can apply filler or primer surfacer over the epoxy to fill any minor imperfections and block flat before you paint. 3. Stacking Coatings – Since epoxy primers adhere mechanically, they will grab onto most anything that has a good texture to the surface.

Can you use polyester filler over epoxy?

We know polyester gelcoat can be used over WEST SYSTEM Epoxy. … Polyester materials can be affected by amines in the epoxy hardener. If the hardener has not fully reacted with the epoxy resin or the amine blush is not removed from the cured surface, problems can occur.

Can I spray enamel over epoxy primer?

From majestic jets to plain tugboats, enamel is commonly used on surfaces that require a durable coat of paint. Available in almost any color desired, it is a topcoat and, as such, requires a primer underneath it. Enamel can not only be painted directly over epoxy paint, it requires it as an undercoat.

Can you Bondo over high build primer?

As long as the filler is fine enough to get into the scratches in the primer or paint and the primer or paint that you’re putting it on is a good quality urethane that is well attached to the surface then you’re probably ok.

Do you have to sand epoxy primer before top coat?

(A) No, epoxy may be topcoated without sanding up to four or five days. After that point, you’ll need to abrade the surface.

Is epoxy primer a filler?

The reasoning behind that, Epoxy is the only primer that you can put body filler on top of. You shouldn’t apply body filler on top of a Self-Etch primer or primer surfacer, but with epoxy you can. Our opinion is if you’re going to be doing some body work, the best thing is to put Epoxy Primer on top.

Can you put polyester primer over epoxy primer?

78 PRIMER FILLER PROCESS PD-1510 Caution: Wear the proper safety protection when sanding, cleaning, mixing and spraying all materials included within this process. … VP2100 Polyester Primer should not be applied over bare metal, only over epoxy primer, fiberglass, or body fillers.

Can I use body filler over primer?

Applying body filler over epoxy primer provides maximum corrosion protection for the metal. Apply filler within seven days of applying epoxy primer to maximize adhesion.

Can I fiberglass over epoxy?

Yes, as long as you glass over it with epoxy resin too.

Can I spray epoxy primer over etch primer?

It is no longer recommended to use an etch primer under an epoxy primer. Residual acid from the etch primer can interfere with the proper curing of the epoxy. This may lead to extended dry times, potential blistering, and even adhesion failure.

Article first time published on

Can you apply body filler over paint?

Can they be applied over paint? A. Evercoat fillers are designed to work over bare, properly prepared substrates such as: steel, aluminum, galvanized metal, fiberglass, and SMC. Fillers and putties will normally work OK over properly sanded (80-180 grit) cured OEM paint.

Can you put body filler on Baremetal?

Before adding any filler, you should get the metal fairly close. … 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 I prime Bondo?

You should use a “direct to metal” (DTM) primer to help top coats stick to the metal but it’s not needed under body filler most of the time. Once the metal is primed then you can apply a “filler primer” (2K) to help hide scratches and minor surface irregularities.

Can epoxy paint be applied over epoxy paint?

Because epoxy painted surfaces don’t allow adhesion, they must be abraded before they will accept new paint. Sanding the old epoxy finish with a 120- to 220-grit sandpaper will promote adhesion. … Once the epoxy has been abraded, any type of paint will bond to it.

What can I paint over epoxy paint?

If the existing epoxy paint is a two-part epoxy, polyurea, polyaspartic or polyurethane, an additional layer of compatible paint should adhere to the floor. According to System Three Resins, linear polyurethane paints, also known as LPUs, are the best option to use over epoxy coatings.

Does paint stick to epoxy primer?

Generally, epoxy primers and LPU paints are compatible with epoxy resin coatings and may even chemically bond. However, some of the alkyd enamels and other one part paints and varnishes may not properly dry on epoxy resin coatings.

Can you clear over epoxy primer?

Good quality clears do provide significant UV filtering, but that filtering is far from 100%. You will have a more durable finish if you top coat the epoxy with an opaque urethane. For what you intend to use the truck for I would just go ahead and shoot the clear. It will last years without any problems .

How do you smooth out epoxy primer?

Based on my general knowledge of epoxies, I would give it at least 2 days in the sun, more if you can. Then use some 220-320 wet sandpaper and sand it smooth.

How many coats of epoxy primer do I need?

The epoxy primer should be applied in medium wet coats, allowing a half an hour between each coat at around 70 degrees. One to two coats will render a one millimeter dry film thickness, which is typically enough to be completely effective. Make sure to evenly spray each coat completely across the bare metal surface.

Is 2K epoxy primer Sandable?

Epoxy primer may be topcoated after approximately 30 minutes (wait 45-60 minutes after applying more than two coats), or up to about five days. After five days, primer MUST be scuff sanded prior to topcoat application. May be sanded (wet) the day after application.

What is 2K filler primer?

Universal, quick-drying 2K primer for high-quality automotive paint jobs. Ideal for partial paint jobs and spot repairs.

Can you use body filler over por 15?

CAN I USE BODY FILLER OR PUTTY WITH POR-15? Yes. First paint both sides of the rusted area with POR-15; then use body filler or putty as soon as the POR-15 is dry to the touch.

Can I put 2K primer over epoxy primer?

Once sanded, you can put anything over epoxy, like 2K primer, paint, etc. You don’t need epoxy a second time. to make them spray better and/or lay smoother. With or without the reducer the 2K is the same product.

Does fiberglass stick to epoxy primer?

doesnt stick. it will stick reasonably well for something like that or when we put body filler on out cars but when it comes to making a structural repair like on a boat or fibeglass part, it would never hold up. the polyester would delaminate off the epoxy when under stress.

Does epoxy primer seal fiberglass?

However, if you use Tuff Stuff marine epoxy primer on the bare fiberglass, it will provide protection against blisters and any moisture. It will also improve adhesion to the hull. Tuff Stuff marine epoxy primer will last for many years. It cannot be applied over paint, it must be applied on gel coat (bare fiberglass).

Will epoxy stick to cured epoxy?

Epoxy applied over partially cured epoxy will chemically link with it and is a primary bond. The ability to chemically link diminishes as the epoxy cures and it becomes a secondary bond. Secondary bonding relies on the mechanical linking of an adhesive to a material or cured epoxy surface.

What's the difference between etching primer and epoxy primer?

Self etching primer bonds well to bare metal surfaces and can be top coated in a short period of time. Epoxy primer can be applied in heavy coats which can be guide coated and block sanded to remove small imperfections in the body. Epoxy primer takes longer to dry (cure) before it can be sanded or top coated.

What primer should I use on bare metal?

Simply put, epoxy is the best primer for bare metal, making it excellent for newly fabricated metal parts or ones that have been fully stripped.

Is etch primer epoxy?

SPI epoxy is specifically designed to be applied under filler, not so much for adhesion (filler sticks well to metal) but for corrosion protection. Filler and etch primer are both porous, epoxy is not, so epoxy provides a moisture barrier right at the metal where it’s needed the most.

What is the difference between body filler and putty?

Putty is essentially a thick paint with a filler material – it’s generally used for very small scratches where the metal is not exposed. Air hardening. Body filler is a polyester resin suitable for small dents. Chemical hardening, a cheap and easier (by a long way) substitute for body solder.

How thick can you apply body filler?

There is no minimum thickness for Bondo, but there is absolutely a maximum. You do not want to apply body filler to anything that is thicker than about a 1/4”. That does not mean it can’t be done, but the repair will not last as long.