HYPrime Primer

Hyprime Primer is a low VOC, oxidized asphalt emulsion primer, prepared with select asphalts, penetrating solvents and proprietary emulsifiers. Hyprime primer is an all-purpose primer and is to be used when adhering Hyload Self-adhering membranes to substrates including, but not limited to, fiberglass-faced gypsum sheathing, protection board, and CMU back up walls.
Tech Data PDF

Product Highlights

  1. Recommended to adhere all Hyload membrane systems
  2. Not effected by high alkaline environments typical of masonry construction
  3. Hyload Systems will not deteriorate or harden with longevity or ultra violet ray exposure
  4. Low VOC’s. 190g/l max
  5. The excellent qualities of this product allow it to adhere to most dry surfaces.
  6. The surface dries within one hour under most temperatures and humidity conditions
  7. Asbestos free formulation.
  8. Nonpolluting, flame resistant.
  9. Cured asphalt film meets ASTM D 41 requirements.

Applications and Packaging


  • Through-Wall Masonry Flashing
  • Door Jam Flashing
  • Window Jam Flashing
  • In conjunction with Hyload Pre-Formed Shapes
  • Hyload Waterproofing membranes
  • Hyload Roofing membranes


  • 5 gallon pail

Substrates and Performance Properties

  • ALL Hyload Membranes.
  • Wood
  • Metal
  • Concrete, Block, and Masonry
  • Stainless Steel

Performance Properties

Wt / GalD29397.9 – 8.1
SolidsD6511% by weight 40-44
% by volume 40-44
Viscosity, cpsBrookfield RVT #3200-500
Flash PointPMCC105 min
Colored, cured VisualGlossy Black
Drying time, touch 70°F / 50% RH1 hour
Shelf Life 70°F / 50% RH1 year
VOC EPA Method 24A190 g/liter

Limitations and Warranty

  • Hyload Hyprime Primer should not be applied when temperatures are below 40°F or when rain is imminent.
  • Keep Hyload Hyprime Primer from freezing.
  • During hot weather, the product should be stored in a cool shaded area.
  • Do not dilute this product.
  • Curing rates will vary depending on the ambient temperature relative humidity, wind speed, sky condition, and the proper rate of application. Generally speaking, Hyload Hyprime Primer will dry within 15 to 30 minutes when applied at 70°F or above. At 50°F, on a cloudy day, cure time may be extended to as much as one hour.
  • Check several places on primed area for dryness prior to proceeding with the flashing application.


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.