Hyproof LAM (Liquid Applied Membrane)

A high quality, moisture curing elastomeric waterproofing and sealant designed to fill, seal and level grout lines, voids, seams and surface damage on construction materials prior to application of liquid waterproofing.
Tech Data PDF

Product Highlights

  1. Solvent free
  2. Moisture cure
  3. High solids will not shrink
  4. No outgassing on damp surfaces
  5. Bonds to green concrete
  6. Wet film thickness equals dry film thickness
  7. Non flammable
  8. Very fast setting – Two coats in one day
  9. Very low odor
  10. May be used in confined spaces
  11. Conforms to OTC Rule for Sealants
  12. Conforms to USDA Requirements for Non-food Contact
  13. Meets requirements of California Regs: CARB and SCAQMD
  14. This product does not contain cancer causing chemicals listed in California Proposition 65
  15. NAHB Model Green Home Building Guidelines: 5 Global Impact Points
  16. VOC Content: Less than 36 grams /liter ASTM D2369 EPA Method 24 (Tested at 240 ̊ F / 115 ̊ C)

Applications and Packaging


  • Above grade waterproofing (with UV protection course
  • Below grade waterproofing
  • Horizontal between slab underlayment
  • Plaza Decks
  • Balconies
  • Tunnels
  • Roofing repair
  • Planter boxes
  • Lining HVAC condensation pans


  • Black Colored
  • 5 Gallon Pails
  • 36 Pails per pallet

Substrates and Performance Properties

  • The substrate should be smooth, level, clean, and dry.
  • Dead load capabilities of the deck and supporting structure must be sufficient to support the load of the new system.
  • H150E can be installed directly over existing substrates, including coal tar pitch, approved insulation cover board, or base sheets after all have been properly primed.
  • H150Ecan be used as the surface membrane in a built up system

Performance Properties

GradeLiquid Applied
Viscosity 275,000 cp +/- 50,000 cpBrookfield RVF TE Spindle, 4 RPM, 73°F (23°C
Density 10.9 +/- 0.2 lbs per gallonASTM D1475
Tack Free Time 60 min +/- 20 min 45 +/- 5 % R.H.
Solid Content by Weight98%ASTM C1250
Hardness Shore OO 57ASTM D2240
Average Permeability 0.1 perm inchesASTM E96
(Vertical) Film Thickness PASSASTM C1375
Adhesion- in-Peel PASSASTM C794
Extensibility Heat Aging PASSASTM C1522
Service Temperature -40°F to 200°F (-40°C to 93°C)

Shelf Life

Six months from date of manufacture when stored at 70°F / 21°C with 50% relative humidity. High temperature and high relative humidity may significantly reduce shelf life.

Limitations and Warranty

  • Hyproof LAM is not intended for use with a permanently exposed surface
  • In areas where prolonged chemical exposure is anticipated, contact Technical Services for recommendations.
  • Do not use in above grade applications without a protective UV barrier.
  • If Hyload LAM is to be coated with a UV barrier, test for asphalt staining before coating.
  • Do not store in elevated temperatures.
  • Remove all coatings and sealants before application.
  • Do not apply at temperatures below 35°F (2°C).


Hyload makes available to its customers several high performance product warranties.  Contact Hyload’s Corporate Office directly for details. A standard warranty is 10 years.