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Sealcoat and slurry seal questions, answered by the plant.

Super Seal 100 is asphalt-emulsion sealcoat — slurry seal, by its trade name — mixed at our own yard in Rathdrum, Idaho from asphalt emulsion, sand and bentonite clay. We sell it in bulk to contractors: will-call at the yard, or delivered from 3,500 gallons across North Idaho, Eastern Washington and Western Montana.

The product

Is slurry seal the same thing as sealcoat?

Here, yes. Super Seal 100 is one product with two names: contractors in Montana and Washington order it as slurry seal, and North Idaho calls the same tank sealcoat. It is an asphalt-emulsion pavement sealer, mixed at our yard in Rathdrum, Idaho, and sold in bulk.

What is in it?

Three things, each with a job. Asphalt emulsion is the binder: it bonds to the mat and stays flexible through a freeze-thaw cycle instead of going brittle on it. Sand is the wear surface: it takes the traffic and puts texture back on a slick, polished lot. Bentonite clay is the suspension: it holds the sand in the mix from the plant to your job.

The sand and the clay are in the tank when you load it; you are not finishing a concentrate in the truck.

Is it asphalt emulsion or coal tar?

Asphalt emulsion. That is the same chemistry as the pavement it goes on, which is why an asphalt-based sealer bonds to the mat and stays flexible after it cures — it moves with the surface through freeze-thaw instead of cracking over it.

Why is there sand in it?

Sand is what a sealed surface wears on. An emulsion film with no aggregate in it is slick when it is wet and wears through under tires; the sand gives the film traction and body and takes the traffic so the binder does not have to. In Super Seal 100 the sand goes in at the plant, and the bentonite is there to keep it from settling out between our tank and yours.

What does the bentonite clay do?

It keeps the sand in suspension. A clay-stabilized emulsion thickens when it stands and loosens when it moves, so the sand stays distributed through the mix instead of dropping to the bottom of the tank. That is also why the storage rule is what it is: an agitated tank, mixed weekly.

Using it

How much does a gallon cover?

35 to 120 square feet per gallon, depending on the asphalt surface. A rough, raveled or sun-burned mat drinks material and sits at the low end; a tight surface that has been sealed before sits near the top. Bring the square footage and a description of the surface when you call and we will size the order to it.

How much water do I add?

We recommend diluting 10 to 20% with water, depending on the air temperature. Use clean water. Water is what gives the mix its flow for an even coat: too little and it lays down heavy and uneven, too much and the film goes on thin and wears early. Where your day sits in that range is a question for the order desk.

What temperature does sealcoat need?

60°F and rising. In North Idaho and the country around it that is typically mid-April to the end of September; Western Montana’s window is shorter. The trade’s general rule for any emulsion sealer is no rain in the forecast for the next 24 hours.

How long does sealcoat take to dry?

3 to 24 hours to cure, depending on the air temperature. Plan traffic around the top of that range unless the order desk tells you your conditions allow less.

When can new asphalt be sealed?

Not until it has cured. The trade quotes anywhere from a couple of months to a full season, and the practical test is the surface: it should have lost its oily sheen and taken some traffic.

How often should a lot be resealed?

The usual rule of thumb is every two to three years, and it moves with traffic and climate: a lot that gets plowed, sanded and salted through a North Idaho winter is on the short end. Look at it every year and let the surface decide.

Buying and keeping it

How is it sold?

In bulk, to contractors. Load out at the yard in Rathdrum, or we deliver once the order is a load: delivered loads start at 3,500 gallons, and we can supply bulk quantities up to 4,500 gallons. Pricing is by the load, on volume and distance — call or send the details and you get a number and a date the material can be ready.

Where do you deliver?

North Idaho, Eastern Washington and Western Montana: the panhandle up and down US-95, west into Spokane and the Columbia Basin, and east over Lookout Pass into the Missoula and Flathead valleys. Each region has its own page with the towns and the road.

Not on the list? Distance is a line item, not a wall — if the order is a load, the answer is usually a number rather than a no.

How do I store it between jobs?

In an agitated tank, mixed weekly, and never where it can freeze. Freezing breaks an emulsion: the asphalt separates from the water and it does not come back. Gentle movement is enough — the point is to keep the sand distributed and the emulsion whole. Its shelf life is the current sealcoat season.

What should I have ready when I call?

Four things: the square footage and how many coats; what the surface is doing now; the tank you are putting it in; and the week you need it. With those, the quote is a conversation, not a callback.

Why Super Seal 100

What makes Super Seal 100 different from a standard sealer concentrate?

Three things you can check. It leaves the plant complete: the sand and the bentonite are in the mix, held in suspension, so you are loading a finished material rather than a concentrate you sand and stabilize in the truck.

It is asphalt emulsion — the same chemistry as the mat — so the film stays flexible through freeze-thaw.

And the people who mixed it are the people who answer the phone: ask what is in it, or how much water it wants on a ninety-degree afternoon, and the answer comes from the yard it was made in.

Why does a sanded, clay-stabilized mix matter to a contractor?

Because the wear surface and the suspension are already handled. Sand is what gives a sealed lot its traction and takes the traffic; clay is what keeps that sand from settling to the bottom of a tank between the plant and the job. A mix that arrives with both in it is a mix you can load, dilute to the day, and put down.

Why asphalt emulsion rather than coal tar?

Because it is the same material as the pavement. An asphalt-emulsion sealer bonds to an asphalt mat and stays flexible after it cures, which is what a surface needs in country where the ground crosses freezing and back for weeks every spring and fall. A film that cannot move with the mat cracks over it.

Why buy it from the plant?

One step from the mix to your tank: what you load is what we made, at the yard in Rathdrum. No distributor in the middle, and no pallet wearing a brand from three states away. And when you have a question about the material, you are asking the people who mixed it.

Still a question? Ask the people who mixed it.

The order desk can say where your job lands in a range. A page cannot.

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