Sealcoating Quote Gallons: Concentrate or Mixed Material?
Before comparing gallons in sealcoating quotes, ask whether each number refers to sealer concentrate or the mixed material ready for application. Then confirm the product, measured pavement area, number of coats, and basis for coverage. A larger gallon total alone does not tell you that one proposal provides more protective coating or better value.
Give every quantity a label
Imagine two proposals for the same parking lot: one lists gallons of concentrate, while the other lists gallons of mixed sealer. Those numbers describe different stages of the material preparation. Comparing them directly is like comparing an ingredient quantity with a finished batch. Ask both bidders to name the quantity basis before treating the difference as extra material or a shortage.
SealMaster's MasterSeal page illustrates why the distinction matters. It provides a coverage figure per gallon of concentrate, per coat, and separately gives a mixing procedure that includes water, polymer additive, and sand. That is an example for a named product, not a recipe for every sealer. The page also notes that coverage varies with pavement age, porosity, and application method.
Ask for the product document, not a generic recipe
Request the manufacturer's name, exact product name, and current technical instructions for the proposed material. If an additive is included, ask the contractor to identify it and explain how the proposed combination follows the relevant guidance. You do not need to design the mixture yourself; you need a clear description of what the contractor intends to supply.
GemSeal's technical FAQ explains that mix designs vary with modifiers, sand, weather, and traffic. It also warns against excessive dilution and against assuming that an additive has the same effect in every sealer. The useful purchasing question is therefore not whether water is present, but whether the proposed mixture is appropriate for the identified product and application. Neither manufacturer cited here establishes which material Milliken will use on your property.
Put the material beside a marked area and coat schedule
Ask for a simple marked plan identifying the pavement included in the price. Separate the main parking field from drive-through lanes, small connecting strips, and areas excluded from the work. For a Middle Tennessee business with multiple entrances, a sketch can make an otherwise vague phrase such as entire lot much easier to review.
Next, ask whether the stated coverage or quantity applies to one coat or the whole job. Record the number of coats proposed for each area. If a drive lane receives a different treatment from the parking stalls, keep those areas separate in the comparison. Do not multiply a coverage figure until its units and scope are clear.
A useful comparison sheet has six entries: product name, concentrate or mixed-material basis, included area, coats by area, stated coverage basis, and exclusions. Leave unknown entries blank and send them back as questions. Filling gaps with assumptions can make unlike proposals appear equivalent.
Agree on useful records before the crew arrives
Ask what completion records are available and agree on them before signing. A practical request might include the product used, work dates, areas completed, and any approved changes to the coat schedule. If project-specific material quantities are promised, ask how they will be assigned to your property when a crew serves more than one job.
Treat a delivery quantity as one piece of the record, not a standalone verdict on workmanship. Ask whether it describes material delivered for your job, material loaded for the day, or material actually recorded as applied. If a quantity differs from the estimate, request an explanation tied to the agreed scope rather than immediately assuming either waste or underapplication.
Milliken's sealcoating and striping service page lists parking lot sealing and striping work. When requesting a proposal, include your marked area and ask for the material and quantity basis in writing. The goal is a scope you can understand and compare, not a contest to find the largest number on the page.
Frequently asked questions
Does adding water automatically mean the sealer is being watered down improperly?
No. Water can be part of a manufacturer's specified mixing procedure. Ask whether the proposed dilution follows the instructions for the exact product and mixture rather than judging it by the presence of water alone.
Can two quotes use different gallon totals and still cover the same work?
Yes. They may use different quantity bases or products. First reconcile the included area, coats, product, and concentrate-versus-mixed-material definition before comparing totals.
Should I demand a guaranteed gallon count instead of a written scope?
A gallon count cannot replace a scope. Ask how any estimated or committed quantity relates to the product, included areas, coat schedule, and agreed completion records.