Westman Steel: Installation Guide Masterflash
Master Flash Pipe Flashing
An Engineered Flashing for all Seasons & Reasons
Roof Adaptability
Master Flash works on all types of roofing surfaces, including metal, plastic, tile, rubber membrane, and others. Aluminum base bends with ease to conform to any panel configuration or roof pitch.
Weather Protected
Master Flash is compounded specifically for maximum resistance to weathering due to ozone and ultraviolet light.
Easy On-Site Customization
Master Flash comes in 11 sizes to fit all pipes and vents 1/8” to 26”. Standard colors black and grey.
Compound Choices
Standard EPDM covers all applications from – 65F to +275F. Red Silicone Master Flash is available for environmental extremes, from -100F to +500F.
Numerous Applications
- Plumbing, heating/air conditioning vents and equipment
- Electrical service entrance
- Grain augers
The only EPDM Flashing to have CSA Approval
The CSA label on every piece of EPDM Black Master Flash means that installers will ”NOT” be accosted by local Building Inspectors, making sign-offs that much easier.
CSA, IAPMO and ICC listing or approvals are only available on Master Flash products.
Don’t be fooled by products that look like Master Flash!
 Master Flash # 1(1/4” – 2 1/2”) Master Flash # 2 (1-1/4” – 3”) Master Flash # 3 (1/4” – 5”) Master Flash # 4 (3” – 6 1/4”) Master Flash # 6 (5” – 9”) Master Flash # 7 (6” – 11”) Master Flash # 8 (7” – 13”) Master Flash # 9 (9” – 19”) |
 Master Flash # 3 Hi Temp Silicone Red(1/4” – 4”) Master Flash # 5 Hi Temp Silicone Red (4 1/4” – 7 3/4”) Master Flash # 8 Hi Temp Silicone Red (7” – 13”) Master Flash # 9 Hi Temp Silicone Red (9” – 19”) |
 Retro Fit Master Flash(3/4” – 2 3/4”) Retro Fit Master Flash (2” – 7 1/4”) Retro Fit Master Flash (3 1/4” – 10”) |
Standard & Hi Temp Installation Instructions
 Choose pipe opening and trim |
 Slide flashing over pipe |
 Form flashing to roof profile |
 Apply sealant |
 Fasten flashing to complete |
Retro Fit Installation Instructions
 Using tin snips, cut the cone to fit the pipe, starting opposite the mechanical locking joiner. |
 Wrap Retrofit around the pipe, join the interlocking teeth starting from the top and proceeding down. |
 Squeeze joiner tightly with pliers to crimp, start at the top and work down to the base. |
 Apply sealant to the underside of the base. Shape Retrofit to roof by pressing the aluminum base to the roof profile. |
 Fasten Retrofit to roof using self-drilling screws, leave no gaps between base and the roof contours. |
 Apply additional sealant to mechanical locking joiner seam and to all areas that could be a potential leak risk. |