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Waterproofing

Liquid waterproofing membrane coverage by brand and product

Coverage per gallon and number of coats for each liquid membrane we have checked, taken from the manufacturer's technical data sheet. Open a product to calculate pails for your own shower or floor.

ARDEX ARDEX 8+9 2 coats · 200 sq ft/gal per coat Custom Custom RedGard Waterproofing and Crack Prevention Membrane 2 coats · 80 sq ft/gal per coat LATICRETE LATICRETE 9235 Waterproofing Membrane 3 coats · 100 sq ft/gal per coat LATICRETE LATICRETE HYDRO BAN 2 coats · 100 sq ft/gal per coat MAPEI MAPEI Mapelastic AquaDefense 2 coats · 120 sq ft/gal per coat MAPEI MAPEI Mapelastic CI 1 coat · 71 sq ft/gal per coat TEC TEC HydraFlex 2 coats · 100 sq ft/gal per coat

Side-by-side comparison

Application rates per US gallon per coat. Last column: pails to buy for 100 sq ft plus 10% waste at the application shown.
ProductPailsCoats × coverageFor 100 sq ft
ARDEX 8+9
ARDEX		convenient kit (1 gal / 3.78 L ARDEX 8 liquid + 9 lb / 4 kg ARDEX 9 powder) and commercial unit (3 gal / 11.34 L liquid + 27 lb / 12 kg powder)Over drywall or backer board: 2 coats, 100 sq ft per kit (per gallon of ARDEX 8): 2 × 200 sq ft/gal
Over concrete: 2 coats, about 70 sq ft per kit (per gallon of ARDEX 8): 2 × 140 sq ft/gal		2 × 1 gal convenient kits (Over drywall or backer board: 2 coats, 100 sq ft per kit (per gallon of ARDEX 8))
Custom RedGard Waterproofing and Crack Prevention Membrane
Custom Building Products		1 gal (3.78 L) and 3.5 gal (13.2 L) pailsShower pan / ANSI A118.10 waterproofing: 2 × 80 sq ft/gal
General waterproofing: 2 × 110 sq ft/gal
Crack prevention (continuous): 1 × 100 sq ft/gal
Crack isolation to ANSI A118.12: 2 × 50 sq ft/gal
Vapor barrier, up to 8 lb/1000 sq ft/day: 1 × 70 sq ft/gal
Vapor barrier, up to 12 lb/1000 sq ft/day: 2 × 70 sq ft/gal		1 × 3.5 gal pail (Shower pan / ANSI A118.10 waterproofing)
LATICRETE 9235 Waterproofing Membrane
LATICRETE		2 gal (7.6 L) pail kit and 6 gal (23 L) pailFull waterproofing with fabric (3 coats): 3 × 100 sq ft/gal
Interior cement board or drywall walls, no fabric (2 coats): 2 × 100 sq ft/gal
Crack isolation strip with fabric (2 coats): 2 × 100 sq ft/gal		2 × 2 gal pail kits (Full waterproofing with fabric (3 coats))
LATICRETE HYDRO BAN
LATICRETE		1 gal (3.8 L) and 5 gal (18.9 L) pailsWaterproofing / shower pan (ANSI A118.10): 2 × 100 sq ft/gal
Crack isolation (ANSI A118.12): 2 × 100 sq ft/gal		3 × 1 gal pails (Waterproofing / shower pan (ANSI A118.10))
MAPEI Mapelastic AquaDefense
MAPEI		1 gal (3.79 L), 3.5 gal (13.2 L) and 5 gal (18.9 L) pailsCoverage chart: 2 coats, 60 sq ft per gallon finished: 2 × 120 sq ft/gal
Full wet film: 20 + 15 mils (heavier, about 46 sq ft per gallon): 2 × 91 sq ft/gal		2 × 1 gal pails (Coverage chart: 2 coats, 60 sq ft per gallon finished)
MAPEI Mapelastic CI
MAPEI		1 gal (3.79 L) and 3.5 gal (13.2 L) pailsCoverage chart: 1 coat, 15 mils dry (71 sq ft per gallon): 1 × 71 sq ft/gal
Two full coats (if the first coat leaves thin spots everywhere): 2 × 71 sq ft/gal		2 × 1 gal pails (Coverage chart: 1 coat, 15 mils dry (71 sq ft per gallon))
TEC HydraFlex
TEC		1 gal (3.78 L), 3.5 gal (13.24 L) and 5 gal (18.93 L) pailsWaterproofing (ANSI A118.10): 2 coats x 25 mils wet, 50 sq ft per gallon: 2 × 100 sq ft/gal
Steam room: 2 coats x 30 mils wet, 40 sq ft per gallon: 2 × 80 sq ft/gal
Crack isolation up to 1/8 in: 1 coat x 25 mils wet, 100 sq ft per gallon: 1 × 100 sq ft/gal
Crack isolation up to 1/4 in: 1 coat x 50 mils wet, 50 sq ft per gallon: 1 × 50 sq ft/gal
Waterproofing by volume: 2 full 25 mil coats (heavier, about 32 sq ft per gallon): 2 × 64 sq ft/gal		3 × 1 gal pails (Waterproofing (ANSI A118.10): 2 coats x 25 mils wet, 50 sq ft per gallon)

7 products. Real coverage depends on the tile, the substrate and your technique; each product page explains how its numbers are worked out.

Sources