GENFLASH Primerless 40-Mil Butyl Flashing – 75' Rolls
Ships in 1–2 business days
GENFLASH® PRIMERLESS PROVIDES A FAST, RELIABLE WATERPROOFING SOLUTION WITH NO PRIMER REQUIRED, DELIVERING STRONG ADHESION AND LONG-TERM PERFORMANCE ACROSS A WIDE RANGE OF SURFACES
GENFLASH® Primerless is a 40-mil thick composite flashing membrane featuring a custom clear, non-asphaltic butyl adhesive. Designed for ease of installation, this membrane eliminates the need for primer while providing excellent adhesion to a variety of substrates including concrete, masonry, wood, steel, gypsum, insulation, and ICF systems. Its flexible construction allows it to conform to irregular surfaces, while its self-sealing properties ensure a tight seal around fasteners.
FEATURES
- No Primer Required For Faster Installation
- 40-Mil Composite Membrane For Durability And Performance
- Non-Asphaltic Butyl Adhesive Will Not Drool At High Temperatures
- Self-Seals Around Nails And Screws
- Excellent Adhesion To Multiple Substrates
- UV Resistant Up To 120 Days
- Flexible Membrane Conforms To Irregular Surfaces
- VOC, HCFC, And CFC Free
USES
- Window And Door Flashing
- Thru-Wall Flashing Applications
- Air And Water Barrier Transitions
- Masonry And Concrete Wall Systems
- ICF (Insulated Concrete Form) Applications
- General Waterproofing And Detailing
SIZES / OPTIONS
- Roll Length: 75'
- Membrane Thickness: 40 Mil
- Film Color: White
WIDTHS & PACKAGING
| Width | Rolls Per Box | Linear Feet Per Box |
|---|---|---|
| 4” | 9 | 675’ |
| 6” | 6 | 450’ |
| 9” | 4 | 300’ |
| 12” | 3 | 225’ |
| 16” | 2 | 150’ |
| 18” | 2 | 150’ |
| 24” | 1 | 75’ |
| 36” | 1 | 75’ |
INSTALLATION NOTE
GENFLASH® Primerless requires the use of termination bars to properly secure and terminate the membrane at edges and transitions.
SPECIFICATIONS
| Property | Value |
|---|---|
| Membrane Type | Composite |
| Adhesive | Non-Asphaltic Butyl |
| Thickness | 40 Mil |
| Primer Required | No |
| UV Exposure | Up To 120 Days |
TECHNICAL DATA
| Mechanical | Typical Values | Unit | Test Method |
|---|---|---|---|
| Elongation | 20 | % | ASTM D412 |
| Tensile Strength | 5230 | psi | ASTM D412 |
| Low Temperature Flexibility | No Cracks | — | ASTM C765 |
| Water Vapor Transmission | 0.011 | perms | ASTM D751 |
| Water Absorption | 1.48 | % | ASTM E96 |
| Mullen Burst | 400 | psi | ASTM D751 |
RESOURCES