Conventional three-coat stucco means three mobilizations, three inspections, and cracks in year two. StuccoMax is a true one-coat waterproof stucco — applied at 3/16" directly over EPS foam and most building substrates. Natural limestone sand and no Portland cement, so it bonds and stays bonded.
StuccoMax is a true one-coat waterproof stucco designed to adhere directly to EPS foam, CMU block, DensGlass, Securock, cement block, concrete, existing stucco and other building materials. The 3/16" single-coat application has over 3,500 PSI compressive strength.
It's made with natural limestone sand and no Portland-type cements, so it doesn't fight the substrate. Hand or machine applied, it cures with at least seven hours over 45°F. The result is water-resistant, low-permeability, freeze-thaw, sulphate and mold resistant — with low shrinkage and high early strength.
Published performance figures. Full architectural specs and test reports are in the downloads below.
| Compressive Strength | 3,500+ PSI |
| Application | 3/16" Single Coat |
| Sand | Natural Limestone |
| Portland Cement | None — Low Carbon |
| Permeability | Vapor Barrier Grade |
| Application Method | Hand or Machine |
| Cure | 7 hrs over 45°F |
| Resistance | Freeze-Thaw · Sulphate · Mold |
StuccoMax bonds directly to a wide range of substrates and works as a bonding agent for manufactured stone facings.
Architectural specifications, technical data, application guides, and warranty — the documents your architect, GC, and AHJ will ask for.
Yes. It's a true one-coat waterproof stucco applied at 3/16" thick, replacing the three mobilizations and inspections of conventional three-coat stucco.
The 3/16" single-coat application has over 3,500 PSI compressive strength, with high early strengths.
EPS foam, CMU block, DensGlass, Securock, cement block, concrete, existing stucco and other building materials. It also works as a bonding agent for manufactured stone facings.
No. StuccoMax uses natural limestone sand and no Portland-type cements, which lowers its carbon footprint and helps it bond without fighting the substrate.
It's formulated for low shrinkage and is water-resistant with low permeability, acting as a vapor barrier. It also resists freeze-thaw damage, sulphate attack, and mold and mildew.
Hand or machine applied at 3/16", it needs at least seven hours of curing in temperatures over 45°F.
Send the substrate and wall area and we'll return specs, the Division 9 sheet, and pricing.