Loxon XP - Waterproofing Masonry Coating-Flat LX11-50 Series - Application and compliance specifications

Nov 2, 2026

Loxon XP is an exterior high-build masonry waterproofing coating designed to protect concrete, CMU, stucco, and shotcrete/gunite against wind-driven rain with excellent flexibility, durability, and weather resistance. It is highly alkali and efflorescence resistant and can be applied on surfaces with pH 6–13, including high-pH substrates up to 13 without primer. Coverage and drying/recoat times depend on conditions, and a two-coat system within specified wet mils is required. The document also lists VOC, solids, flash point, mildew resistance, shelf life, compliance standards, application temperature guidance, spray/brush/roller equipment tips, and lead-dust safety for surface preparation.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages2

Reading Time5 min

AccessFree to download

Characteristics

Compliance

Application

Temperature and application tips

Recommended systems

Surface preparation & lead safety

115.10 Loxon® XP Waterproofing Masonry Coating-Flat LX11–50 Series CHARACTERISTICS Loxon XP is an exterior, high build coating that provides excellent flexibility, durability, and weather resistance. This product will protect against wind-driven rain when used on concrete, CMU, stucco and shotcrete/gunite. It is highly alkali and efflorescence resistant. This may be applied to a surface with a pH of 6 to 13. Apply directly to fresh concrete (at least 7 days old) . Shotcrete-gunite surfaces may be painted after 3 days. Can be applied over high pH (up to 13) substrates, no primer required. Can be applied down to 35°F. Color: Most Colors 1 coat system, brush, roller, or spray applied, coverage per coat: Wet mils: 14.5-18.5 Dry mils: 6.5-8.4 Coverage: 85-110 sq. ft. per gallon Can be applied up to 40 mils wet. Coverage will vary with the substrate and the texture. Coverage on porous & rough stucco 80 square feet per gallon. Drying Schedule @ 50% RH: @35-45°F @45+°F To touch 6 hours 4 hours To recoat 24-48 hours 24 hours Drying and recoat times are temperature, humidity, and film thickness dependent. Finish: 0-10 units @ 85° Tinting with CCE only: Base Extra White Deep Base Ultradeep Light Yellow oz. per gallon 0-6 4-12 10-12 0-12 Strength SherColor SherColor SherColor SherColor Extra White LX11W0051 (may vary by color) V.O.C. (less exempt solvents) : less than 50 grams per litre; 0.42 lbs. per gallon As per 40 CFR 59.406 Volume Solids: 45 ±2% Weight Solids: 61 ±2% Weight per Gallon: 11.46 lbs Flash Point: N.A. Vehicle Type: Proprietary Acrylic Shelf Life: 36 months , unopened Mildew Resistant: This coating contains agents which inhibit the growth of mildew on the surface of this coating film. COMPLIANCE As of 07/10/2025 , Complies with: OTC OTC Phase II S.C.A.Q.M. D. CARB CARB SCM 2007 CARB SCM 2020 Canada LEED® v4 & v4 .1 Emissions LEED® v4 & v4 .1 V.O.C. EPD-NSF® Certified MIR-Manufacturer Inventory MPI® SWRI® -Wall Coating Yes Yes Yes Yes Yes Yes Yes N/A Yes Yes N/A \#10, 40 Yes APPLICATION Temperature: minimum 35°F The following is a guide. Changes in pressures and tip sizes may be needed for proper spray characteristics. Always purge spray equipment before use with listed reducer. Any reduction must be compatible with the existing environmental and application conditions. Reducer: Do Not Reduce Airless Spray: Pressure 2300 p.s. i. Tip .021 inch Brush: Use a nylon-polyester brush such as Purdy® Pro-Extra® Roller Cover: 1/2-1 1/2 inch nap synthetic roller cover such as Purdy® Marathon® The substrate and its condition will determine the application procedure. Considerations to minimize pinholes: • 2 coat application with overnight drying between coats • Spray application with backrolling • Power rolling Spray and backroll on porous & rough stucco to achieve required film build and a pin-hole free surface. When the air temperature is at 35°F, substrates may be colder; prior to painting, check to be sure the air, surface, and material temperature are above 35°F and at least 5°F above the dew point. Avoid using if rain or snow is expected within 2-3 hours. Do not apply at air or surface temperatures below 35°F or when air or surface temperatures may drop below 35°F within 48 hours. Do not reduce. APPLICATION TIPS For proper waterproofing performance and to resist alkalies, 2 coats of the coating MUST be applied between 14.5-18.5 mils wet per coat. A total dry film thickness of 13 - 16.8 mils of topcoat and a surface with 10 or less pinholes per square foot is required for a waterproofing system. For extremely porous block a coat of Loxon Block Surfacer may be required to achieve a pinhole free surface. For rehabilitating existing concrete water tanks, additional products may be used. RECOMMENDED SYSTEMS Concrete, Stucco, Concrete Block, CMU, Splitfa

FAQs

What substrates can Loxon XP be applied to, and is primer required on high-pH surfaces?

Loxon XP can protect concrete, CMU, stucco, and shotcrete/gunite. It can be applied over high-pH substrates up to pH 13 without requiring a primer.

What are the required coating thicknesses and pinhole targets for waterproofing?

Apply 2 coats with 14.5–18.5 wet mils per coat, achieving a total dry film thickness of 13–16.8 mils. The waterproofing system requires 10 or fewer pinholes per square foot.

What precautions are recommended when preparing surfaces that may contain old lead paint?

Scraping or sanding old paint may release lead dust. The document advises avoiding exposure, wearing a NIOSH-approved respirator, and cleaning carefully with a HEPA vacuum and wet mopping, with additional guidance provided via the National Lead Information Hotline.

Nov 2, 2026

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