Quick Answer: Do I Need To Undercoat Over Zinsser BIN?

Do I need to use undercoat after primer?

If it is a new surface, use a primer.

If your painting an existing surface that has been painted before, use an undercoater.

One basic rule of thumb to remember: An undercoat is always a primer, but a primer is not always an undercoat.

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Can you paint over Zinsser BIN?

B-I-N®, developed in 1946, is the original shellac-based white-pigmented primer-sealer stain-killer. It is formulated to seal, prime and block out stains on previously painted or new work. … Any oil or latex paint can be applied over it.

Can I use white paint as a primer?

Re: Leftover Paint Used As Primer? Paint shouldn’t be used as a primer. Primers are specifically made for adhesion and sealing. Self priming and paint & primer in one is a load of crap.

Do I need to undercoat over old Gloss?

If you want to paint over gloss with gloss there’s no need to use it. Just give the surface a clean and sand before painting. If you are painting over gloss woodwork with a satin or eggshell finish, you also won’t need to use this primer. Lightly sanding and cleaning will help the new paint adhere.

Is Zinsser BIN waterproof?

It can be recoated in just four hours and dries to a smooth, bright white, non-yellowing finish that resists dirt and dust pick-up. Watertite® waterproofing paint is guaranteed to keep water out and contains a biocide that protects the dried coating against fungal degradation for a minimum of 5 years.

Can you use water based paint over shellac?

Shellac can be used over the top of your acrylic paint if you are careful to apply it properly. You can use one coat to seal the wood. All you need to do is rub it on liberally and then wipe the surface to seal it.

How many coats of bin primer do I need?

Very porous surfaces may require two coats which may reduce the square foot coverage of the product. B-I-N is an excellent interior stain killing primer. One coat effectively blocks stains, including water, nicotine, ink, crayon, marker, rust and smoke stains so they will not bleed into the topcoat.

Why can’t you use TSP with Zinsser primer?

In doing an house where there had been heavy, heavy smoking (the nicotine was running off the walls) I emailed the Zinsser site asking why they do not recommend washing the walls with TSP first. Their reply was that the TSP could leave a residue that made the primer less effective.

Is Primer the same as undercoat?

Generally, an undercoat is always a primer, but a primer is not always an undercoat. … If it is a new surface, use a primer. If your painting an existing surface that has been painted before, use an undercoat.

How many coats of undercoat should I use?

On bare wood, two coats are usually enough. The topcoat—whether gloss, satin or eggshell finish–adds texture rather than colour, so add a third layer of undercoat for full coverage if needed. Alternatively, combined primer undercoat paints are available – you’ll need three or four coats.

Do I need to sand undercoat before glossing?

Two layers of undercoat should cover any darker paint finishes underneath and also helps to build a better base for the gloss coat. Leave the second undercoat to dry for 24 hours and then rub it down all over with 400-grade wet and dry paper (used dry) wrapped around a sanding block.

What’s the difference between Zinsser BIN and Zinsser 123?

BIN is solvent (methylated spirit) based, 123 is water based both are good stain blockers but BIN is better for resin (knots etc) only for spot priming when used outside (no idea why I painted a whole stack pipe in it no problem) while 123 is for large areas.