Reviews
W.R. Meadows 1100 Clear Curing Compound Review
W.R. Meadows 1100 (formerly 1100-CLEAR) is a water-based hydrocarbon resin cure that meets ASTM C309 Type 1, Classes A and B, at about 200 ft²/gal (4.91 m²/L). It starts to break down after about four weeks of UV. Use it where flooring or paint follows, after it dissipates or is removed. It is not a sealer.
The verdict
Buy it if
- The slab gets flooring, paint or a densifier later and you want a cure that breaks down
- A spec calls for C309 Type 1, Class A or B, and you buy by the pail, drum or tote
Skip it if
- You want a seal that lasts; the film starts breaking down after about four weeks of UV
- You hoped to skip prep; it still has to dissipate or be removed before flooring
Consider instead
- Euclid Kurez DR VOX when a densifier follows
- Dayton J11W, which wears off in 30 to 60 days
This review is built from the W.R. Meadows data sheet dated June 2026, not from field trials or star ratings. No affiliate links are on this page. For how 1100 stacks up against six other products, see the best curing compounds roundup.
What is W.R. Meadows 1100 Clear?
1100 is a clear, water-based curing compound “formulated from hydrocarbon resins” for interior, exterior, vertical and horizontal concrete. It forms a membrane that holds water in the slab while the cement hydrates, then breaks down in sunlight (W.R. Meadows).
The sheet says “This product is formerly known as 1100-CLEAR,” so quotes and submittals may use either name. A version with red fugitive dye is sold as Type 1-D, which lets you see where you have sprayed.
It is a cure, not a cure and seal. The film is meant to go away, which is the point if something else goes on the slab later. For how that class of product works, see dissipating curing compound.
What does the 1100 data sheet say?
Here are the numbers W.R. Meadows publishes. “Not listed” means the sheet does not give a figure.
| Item | 1100 data sheet |
|---|---|
| Standard, type and class | ASTM C309, Type 1, Classes A and B (Type 1-D available); AASHTO M 148, Type 1, Classes A and B |
| Base | Water emulsion, hydrocarbon resin |
| Solids | Not listed |
| VOC | 42 g/L (AZ, CA plants); 278 g/L (IL, GA, PA, TX plants) |
| Application rate | About 200 ft²/gal (4.91 m²/L); test area first |
| Dissipation | Membrane starts to break down after about 4 weeks of UV |
| Dry time | 1 to 2 hours; no foot traffic for at least 4 hours, 12 preferred |
| Minimum temperature | 40°F (4°C) air and concrete; keep from freezing |
| Sizes | 5 gal (18.93 L) pail, 55 gal (208.20 L) drum, 275 gal (1040.99 L) tote |
| Shelf life | Best used within 1 year of manufacture, stored indoors at 40 to 90°F (4 to 32°C) |
| Sheet date | June 2026 (supersedes January 2026) |
Check which plant your pail came from. The sheet says 1100 meets federal, CARB, OTC and SCAQMD VOC rules, but the 278 g/L figure is what ships from four of the six US plants listed. Some distributor listings still say “under 100 g/L,” which does not match the current sheet.
Where does 1100 fit, and where does it not?
1100 fits slabs that get a finish later. The sheet says paint, resilient tile or resilient flooring “may be applied on concrete cured with 1100, once the product has dissipated and/or has been properly removed,” after the flooring maker approves it and a small test passes.
| Next step on the slab | Fit | Why, per the sheet |
|---|---|---|
| Resilient flooring, tile, paint | Yes, after it dissipates or is removed | Sheet allows it with the flooring maker’s approval and a test area |
| Exterior flatwork in sun, no finish | Yes | UV and traffic break the film down |
| Interior slab with little daylight | Plan on removal | It “may take longer to dissipate” with limited UV |
| Slab that should stay sealed | No | The film is designed to dissipate |
| Decorative or exposed slab where color matters | Use caution | It may leave a yellow tint; the sheet points to Cristallum |
Dissipating is not the same as gone. Most flooring makers want the slab free of curing compound, so read the curing compound and flooring guide before the flooring sub shows up.
How do you apply 1100?
Spray it once the surface water is gone and you can walk on the slab without marking it. On walls, spray right after the forms come off. These steps come from the sheet:
- Mix gently. The sheet says “DO NOT MIX EXCESSIVELY” to avoid foam, and “DO NOT THIN.”
- Use clean equipment. W.R. Meadows names a Chapin 1949 sprayer with a tip that flows 0.5 GPM (1.9 LPM) at 40 psi (0.276 MPa).
- Hold an even pattern at about 200 ft²/gal (4.91 m²/L). Watch for clogged tips and drips.
- Keep foot traffic off for at least 4 hours, 12 if you can.
- Clean tools with soap and water while wet, or mineral spirits once dry.
Do not spray below 40°F (4°C) air or concrete temperature, and do not mix it with any other product.
How much does 1100 cost?
On 2026-11-08, a 5 gal pail of 1100 was $111.14 at Outpost Construction Supply. That is $22.23 a gallon, or about $0.11 per square foot at 200 ft²/gal.
The same store listed a pallet of 36 pails for $2,778.50, which works out to $77.18 a pail, $15.44 a gallon and about $0.08 per square foot. Prices change, so recheck before you bid, and ask what freight adds.
If 1100 left a yellow tint or spray marks
Stripes are harder. W.R. Meadows warns that drips and uneven spray “may cause the cement to hydrate at different rates,” and “Removal of the film will not change the spray patterns mirrored in the concrete surface.” Grinding the film off will not fix that, so tell the owner before you promise it.
If you need the film off for a finish, the sheet says it may take longer to dissipate when over-applied or kept out of UV. Indoors, plan on removal rather than waiting.
What are the alternatives to 1100?
The close alternatives are other dissipating resin cures. Euclid Kurez DR VOX and Dayton Clear Resin Cure J11W fill the same slot, and the best curing compounds table lists their standards, VOC, rates and sizes side by side.
If the slab stays bare and you want it sealed, a cure and seal is the better fit. If looks matter on a clear cure, W.R. Meadows itself names Cristallum on the 1100 sheet.
W.R. Meadows 1100 vs Concrete Sealers USA PS111
| Spec | W.R. Meadows 1100 | PS111 |
|---|---|---|
| Standards | C309 Type 1, Classes A and B | Claims the C309 moisture-loss limit on smooth troweled concrete only |
| Base | Water emulsion, hydrocarbon resin | Water, silicate |
| What stays on the slab | A membrane that starts to break down after about 4 weeks of UV | No visible film; it soaks in |
| VOC | 42 g/L or 278 g/L by plant | 0 g/L |
| Rate | About 200 ft²/gal | 200 to 250 ft²/gal broom; 300 to 450 troweled |
| Apply at | 40°F (4°C) minimum | 40 to 95°F (4 to 35°C) |
| Sizes | 5 gal, 55 gal, 275 gal tote | 1 gal, 5 gal, 55 gal |
Both columns are the makers’ published claims, not our tests.
Frequently asked questions
Is W.R. Meadows 1100 the same as 1100-CLEAR?
Yes. The June 2026 data sheet says the product is formerly known as 1100-CLEAR. Supply houses still list it under both names, and a red fugitive dye version is sold as Type 1-D.
How long does 1100 take to dissipate?
W.R. Meadows says the membrane begins to chemically break down after about four weeks of UV exposure, and traffic and weather speed it up. Over-application or limited sunlight makes it take longer, so an enclosed slab may need cleaning or grinding.
Can you put flooring or paint over 1100?
Yes, once it has dissipated or been properly removed, per the sheet. W.R. Meadows also says to get approval from the flooring or coating maker first and to do a small test area.
What is the VOC content of 1100?
It depends on the plant. The June 2026 sheet lists 42 g/L for product made in Arizona and California and 278 g/L for Illinois, Georgia, Pennsylvania and Texas. Older listings that say under 100 g/L are out of date.
Why did my slab turn yellow after 1100?
The sheet says 1100 may develop a slight yellow tint while curing, and that over-application or membrane oxidation can discolor or yellow the surface. Where looks matter, W.R. Meadows points to its Cristallum product instead.