Floor Stripper vs Floor Sealer vs Floor Finish: What Each Does, How Many Coats, and How Much to Buy for Your Square Footage
The short answer: stripper takes the old coating off, sealer fills a porous floor so the coating has something to hold, and finish is the wear layer people actually walk on. They go down in that order and never in place of each other. A typical vinyl composition tile (VCT) floor needs stripper and four coats of finish; a porous floor, such as unfinished concrete, gets one or two coats of sealer first and one fewer coat of finish. Here is how to tell which floor you have, how much of each to order for your square footage, and why the cheapest gallon in the program is the stripper you don’t use.
What each product does
| Product | Job | How it goes down (Zep’s directions) |
|---|---|---|
| Floor stripper | Dissolves old finish, wax and built-up residue back to bare floor | Concentrate mixed with hot water, mopped on, left 5–8 minutes, picked up wet, floor rinsed twice |
| Floor sealer | Base coat that blocks stains and helps finish adhere on porous floors | Ready to use, 1–2 thin coats, fully dry between coats |
| Floor finish (polish) | The gloss and wear layer that takes the traffic and gets buffed or burnished | Ready to use, 4 thin coats, fully dry between coats |
Stripper: the dilution decides the cost
Zep’s Heavy-Duty Floor Stripper is a concentrate, and its label gives two strengths. For light-to-medium stripping, mix 16 oz into a gallon of hot water (130–150°F); Zep calls that 1:8, and it is how one gallon of concentrate becomes up to nine gallons of solution. For heavy buildup, mix 64 oz per gallon of water (1:2). At that strength, one gallon of concentrate makes only about three gallons of solution.
That is the first cost lever. Heavy-duty stripping uses about three times the concentrate for the same floor. Floors only need that strength when finish has been laid on for years without a strip, which is one more reason to strip on a schedule rather than when the floor finally looks bad.
The other rules on the label matter as much as the ratio. Leave the solution to work for five to eight minutes. Don’t let it dry on the floor; Zep warns that drying reduces its effectiveness. Pick it up with a mop or wet vacuum, then rinse twice and let the floor dry completely. Stripper residue left on the floor is a common reason a new coat fails to bond, and then the floor has to be stripped again early. Zep lists the product for VCT, concrete, rubber and no-wax tile, and tells you to test a hidden spot first. Pair it with a black or brown pad on a low-speed machine. Our floor pad color guide covers which pad does which job.
Sealer: only when the floor is porous
Sealer is the step most buildings either skip when they need it or pay for when they don’t. Zep’s Stain Resistant Floor Sealer is sold as a base layer that blocks stains and helps the finish adhere and look even. It is ready to use and goes down in one or two thin coats with a dry rayon string mop, in a figure-eight. Each coat dries fully, about 30–45 minutes, with no fans. Zep lists it for VCT, rubber and unfinished concrete.
Zep’s own institutional floor-finish data sheet (Z-Tread High Solids) gives the rule of thumb for the trade-off. Put down four coats of finish on a stripped floor. If the substrate is porous enough to need sealer, put down two coats of sealer and three of finish instead. So sealer replaces one finish coat on porous floors rather than adding a layer to every floor. On sound, previously finished VCT, most crews go straight from a clean, dry, stripped floor to finish.
Finish: four thin coats, and not on every floor
Zep’s High Traffic Floor Polish (the finish) goes down in four thin coats with a dry rayon string mop. Let each coat dry completely to prevent hazing. Zep lists it for VCT, sealed concrete, rubber, asphalt and tile. It also says plainly that it is not for LVP or LVT. That matters in South Florida, where luxury vinyl plank has gone into a lot of offices, rentals and condo common areas. Before you put any finish on a resilient floor, check the flooring maker’s care guide, not just the chemical label.
Keep the finish mop for finish only. A mop that has touched stripper or a degreaser carries residue into the new coat.
How much to order: a 4,000 sq ft worked example
Coverage is the number buyers want and the one the retail labels leave off. Zep’s Commercial product pages give none. Its institutional data sheets show how wide the range is: one gallon of its Zarathon finish covers 2,000–2,500 sq ft, and one gallon of Poly-Shield covers 500–2,000 sq ft. The worked example below uses 2,000 sq ft per gallon per coat and 4 gallons of stripping solution per 1,000 sq ft. Both are example assumptions, so swap in what your crew actually used on the last job. The dollar figures are example prices too ($30 a gallon for stripper concentrate and sealer, $35 for finish), not a quote.
| 4,000 sq ft VCT | Quantity | Example cost |
|---|---|---|
| Stripping solution (16 gal), light duty 1:8 | 16 ÷ 9 = 1.8 gal concentrate | $53 |
| Stripping solution (16 gal), heavy duty 1:2 | 16 ÷ 3 = 5.3 gal concentrate | $160 |
| Finish, 4 coats (sound VCT) | 4 × 4,000 ÷ 2,000 = 8 gal | $280 |
| Porous floor: sealer 2 coats + finish 3 coats | 4 gal sealer + 6 gal finish | $120 + $210 = $330 |
| Scrub and recoat instead of strip: finish, 2 coats | 2 × 4,000 ÷ 2,000 = 4 gal | $140, no stripper |
A routine strip and four coats on this floor comes to about $333 in chemical, or roughly $83 per 1,000 sq ft. If the floor has been left until it needs a heavy-duty strip, that rises to about $440, and to about $490 if the floor also needs sealing. The chemical is still the small line. A full strip is an overnight job for a crew, with the floor closed, so labor costs several times the chemical.
The cheapest gallon is the stripper you don’t buy
Most of the annual cost depends on how often the floor is stripped. That in turn depends on daily care:
- Dust mop daily. Grit is what wears through finish.
- Damp mop with a neutral cleaner. Zep’s finish directions call for its neutral floor cleaner. A degreaser on a finished floor tends to dull or haze the coat you paid to lay. Our neutral cleaner vs degreaser vs floor disinfectant post has the dilutions.
- Restore the gloss instead of stripping. Zep’s directions are to spray buff on a low-speed machine with a red pad, or to burnish on an ultra-high-speed machine with a natural or beige pad.
- Scrub and recoat when buffing stops working. Scrub the top layer with a blue pad and lay two fresh coats. On the example floor, that is about $140 of finish against $333 or more for a full strip.
- Strip when recoats stop bonding or the finish has yellowed. Many buildings strip once or twice a year and recoat in between.
The order to put on the purchase order
For one strip-and-refinish job, order the stripper concentrate, sealer (porous floors only), finish, stripping and buffing pads, two mop buckets and two mops (one for stripper and rinse, one kept for finish), plus wet floor signage. BNRS carries Zep Heavy-Duty Floor Stripper, Zep Stain-Resistant Floor Sealer and Zep High-Traffic Floor Finish in the janitorial chemicals line, along with stripping, buffing and polishing pads. Send us the square footage and the floor type and we’ll price the whole job by the case. For ongoing floor care, put the finish and neutral-cleaner lines into the supplies calculator.
FAQ
Do I need a floor sealer under floor finish?
Only on porous floors. Zep lists its sealer for VCT, rubber and unfinished concrete, and its institutional data sheet calls for two coats of sealer and three of finish when the floor’s porosity requires it. Otherwise it calls for four coats of finish. Sound, previously finished VCT usually goes straight to finish.
How many coats of floor finish should I apply?
Zep’s directions for its High Traffic Floor Polish are four thin coats with a dry rayon string mop, each dried completely before the next. Thin coats dry clear. Thick coats haze and peel.
Can I put floor finish on luxury vinyl plank (LVP or LVT)?
Not this one. Zep states its High Traffic Floor Polish is not for LVP or LVT. Follow the flooring manufacturer’s care guide for luxury vinyl before you apply any coating or stripper.
How much floor stripper do I need?
Work out the gallons of solution your crew uses per 1,000 sq ft, then divide by the yield. At Zep’s light-duty 1:8 mix, one gallon of concentrate makes about nine gallons of solution. At the heavy-duty 1:2 mix, it makes about three.