RoMix Back-Set molecular cement dissolver for ready-mix truck drums, chutes, and construction equipment

Back-Set — Molecular Acid-Free Concrete Remover for Ready-Mix Trucks, Chutes & Hand Tools

Name: RoMix Back-Set
Brand: RoMix Chemical
Availability: InStock

RoMix Back-Set is the flagship molecular cement dissolver — the acid-free, no-fume standard for the ready-mix concrete and construction industries. Back-Set works by molecularly breaking the ionic bond in Portland cement, completely dissolving and releasing hardened cement from any surface without the hazards or infrastructure requirements of acid-based concrete removers. Ready-mix drivers, contractors, and fleet maintenance facilities across the US rely on Back-Set for safe, effective daily concrete removal.

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What Is Back-Set?

Back-Set is an acid-free molecular concrete remover formulated to dissolve Portland cement buildup from metal, rubber, and composite surfaces. Unlike muriatic acid or hydrochloric acid-based products, Back-Set produces no fumes, requires no acid-handling protocols, and is safe enough for everyday use by ready-mix drivers and construction crews without respiratory PPE. The molecular action penetrates hardened cement and breaks it down at the chemical bond level — turning solid buildup into rinsable mud that washes away with water.

Back-Set is the product of choice for ready-mix drum and chute cleaning, small hand tool maintenance, form cleaning, and surface restoration on job sites and in fleet maintenance shops.

Acid-Free Molecular Action

No Fumes or Odors

Safe on Equipment Surfaces

Biodegradable & Environmentally Safe

How to Use Back-Set on Ready-Mix Trucks

Apply Back-Set directly to hardened cement deposits on drum interiors, chutes, and exterior surfaces. Allow adequate dwell time for the molecular action to penetrate and dissolve the buildup, then rinse with water. The application process requires no special equipment — Back-Set can be applied by spray, brush, or direct pour. For ready-mix fleets, incorporating Back-Set into the standard post-pour cleaning routine prevents heavy buildup that requires more intensive treatment.

For heavy existing buildup, consider Back-Set Platinum for initial heavy-duty removal before transitioning to regular Back-Set maintenance.

How to Use Back-Set on Hand Tools & Small Equipment

For cleaning concrete-encrusted hand tools, submerge the tool in a pail of Back-Set for 20–45 minutes, remove, and rinse with cold water. Back-Set's acid-free formula is safe for metal tool surfaces and does not cause the surface damage associated with acid soaking.

See Back-Set in Action

Watch Back-Set turn hardened cement into rinsable mud on ready-mix trucks and construction equipment.

Full Directions for Back-Set

** Always apply Back-Set to a dry surface area! **

Back-Set works best when applied with one of our Mega-Foam Systems. The system draws the dissolver directly from the shipping container and applies it through a hose and trigger gun wand, eliminating premixing, reducing waste, and increasing product dwell time on the encrusted surface. The system starts and stops on demand by opening and closing the trigger wand valve. Back-Set can also be applied with a general garden sprayer or by using the bucket and brush method.

Before application, make sure the surface is cool to touch. Using the Mega-Foam unit, apply the product from the bottom working your way up a section at a time. The foam should cling to the surface. Once the section application is complete, let the product dwell for 10–45 minutes depending on ambient temperature and buildup thickness. (Back-Set may be left on the surface overnight.) Once the product has turned into a white, powdered sugar look, re-apply keeping the encrusted area saturated.

Product exposure time is directly proportional to cement thickness. As the cement changes to a mushy, cottage cheese-like consistency, rinse the entire surface — preferably with high-pressure (500–3000 psi) cold water — from the bottom working up. Regular water pressure from a normal hose will also work sufficiently.

Truck hood with years of hardened concrete buildup before applying Back-Set

Truck, before and after: Hardened concrete had accumulated over the years on this hood of a truck used in the RoMix yard.

Truck hood after Back-Set treatment and pressure washing — concrete removed with no damage

After the truck was soaked with Back-Set, a pressure washer removed the dissolved concrete with no damage to the truck.

Step-by-Step Application Instructions

Completely saturate the area of hardened concrete to be removed with Back-Set via sprayer or soft brush. (Do Not Dilute.) Concrete will turn white upon contact, then darken. If allowed to evaporate, white residue will appear. Do not rinse — re-apply Back-Set to reactivate as needed until concrete is softened.
Allow Back-Set to penetrate for 10–15 minutes. After 10–15 minutes, re-apply Back-Set to the same area. Keep the surface wet with Back-Set. Concrete will begin to soften and pull away from the cleaned surface (approximately 20–30 minutes).
Rinse thoroughly with water pressure. On extra thick buildup, repeat cleaning directions until buildup is soft.
Do not clean with any type of product when temperatures are below freezing or in extreme heat of direct sun. Best cleaning results are obtained when air and surface temperatures are 40°F to 80°F. (Hot surface temperature may cause scorching.)
Always test prior to beginning full-scale cleaning operation. Testing should confirm cleaning effectiveness on each type of surface being cleaned. Test also to determine desired surface contact time and potential for adverse reactions. Allow test panels to dry thoroughly before evaluating final appearance and results.

Directions for Small Hand Tool Cleaning

For cleaning small parts and hand tools, use a small plastic dip vat or plastic pail to submerge the encrusted item for at least 20–45 minutes. Remove the item and rinse well with cold water.

Finishing tool before and after soaking in Back-Set concrete remover

Finishing tool, before and after: Built-up concrete paste dissolved after soaking a short time in a tub of Back-Set.

Discolored liquid showing concrete residue dissolved by Back-Set

Note the change in color of the liquid, due to the concrete residue dissolved from the tool.

* Please Note:

Never spray any chemical on a SUN BAKED HOT SURFACE. (The best application time is early in the mornings, evenings, or shaded area.)
Always wear eye protection when handling any type of chemical.
Back-Set should not be applied to extremely hot surfaces or scorching may occur.
Do not wet concrete with water before applying Back-Set.

Pair Back-Set with These Products

Back-Set works best as part of a complete ready-mix maintenance program. Pair it with these complementary products for better results and extended equipment life:

Back-Set Platinum — Premium molecular cement dissolver for heavy buildup. Use Back-Set Platinum for initial heavy-duty removal on trucks with thick, aged concrete deposits, then transition to regular Back-Set for daily maintenance.
Body Guard — Anti-stick protective coating for mixer drums and chutes. Apply Body Guard after cleaning with Back-Set to prevent future concrete adhesion and reduce cleaning frequency.
View All Concrete Removers — Browse the complete RoMix concrete removal product line for your specific application needs.

Container Sizes

Back-Set comes in various container sizes to satisfy your cleaning needs:

5 Gallon Pail

$145.00

30 Gallon Drum

$502.60

55 Gallon Drum

$748.55

275 Gallon Tote Tank

$3,126.75

330 Gallon Tote Tank

$3,752.10

Frequently Asked Questions

Yes, Back-Set is completely acid-free. Muriatic (hydrochloric) acid is corrosive, produces toxic fumes, and requires respiratory PPE and careful disposal. Back-Set uses molecular chemistry to dissolve Portland cement without any of those hazards — making it safer for workers, equipment, and the environment.

Many ready-mix producers use Back-Set as part of their daily post-pour cleaning routine to prevent buildup. For trucks with existing heavy buildup, Back-Set Platinum is recommended for initial heavy-duty removal before transitioning to regular Back-Set maintenance.

Yes. Back-Set is effective at removing cement residue from concrete forms, surfaces, and equipment. Its acid-free formula makes it safe for use on surfaces where acid application would be problematic.