Posted by Spycor Building on Oct 27th 2025
Quickflash® flashing panels are pre-formed panels designed to flash exterior wall penetrations (electrical boxes, low-voltage wiring, plumbing and gas pipes, sheet-metal ducts, and A/C line sets) as part of a properly lapped weather-resistive barrier (WRB) detail. Each panel is sized for a specific box, pipe, or line set. This selection guide shows contractors how to match the right model to the penetration type, its size or box model, and the wall finish.
Shop by Trade: What to Measure Before You Order
Your Trade |
Shop Here |
What You Need Before Ordering |
|---|---|---|
| Electrical contractors | Quickflash Electrical → | Box brand and part number, box type (single gang, dual gang, 3/0, 4/0, pancake), and wall finish depth (5/8", 7/8", or 1 3/8") |
| Plumbing & gas contractors | Quickflash Plumbing → | Pipe size and material; whether a tee is already attached; tankless water heater (two lines) |
| HVAC & mechanical contractors | Quickflash HVAC & Specialty → | Line-set insulation diameter, cladding (siding, stucco, brick or stone), or duct diameter |
| GCs & builders | All Quickflash products → | A penetration count by type for the whole elevation (see “Ordering for a Full Job” below) |
Quickflash at a Glance
Spec |
Detail |
|---|---|
| Manufacturer | Quickflash Weatherproofing Products, Inc., Las Vegas, NV (incorporated 2001) |
| Product families | Electrical (E-series), Plumbing/Gas/HVAC (P-series, DBL-50), A/C line set (U-C, U-S, U-B) |
| Standard panel size | 11 1/8" × 11 1/8" × 3/32" |
| Large panels | 12 1/2" (P-400, P-600, DBL-50) · 18 1/2" (P-800, P-1000, P-1200) |
| Warranty | 10-year limited (manufacturer) |
| Install guides | Before WRB, after WRB, brick, ZIP System® |
| Where to buy | Spycor Building Products, listed on Quickflash’s official Where to Buy page |
Why Exterior Wall Penetrations Leak
Every wall has penetrations. A typical house has hose bibs, exterior outlets, gas lines, dryer and exhaust ducts, A/C line sets, and low-voltage wiring, and each one cuts through the WRB that keeps water out of the wall cavity.
The common field fixes have the same weak point: they depend on how carefully someone cuts and seals an irregular shape.
- Caulk or sealant is applied at the joint, so its performance depends on the bead, the surface prep, and maintenance over time.
- Hand-cut flashing tape around a round pipe or a box flange leaves laps and wrinkles that are hard to get right on every penetration.
- “X-cuts” in housewrap create flaps that can channel water toward the hole instead of away from it.
When water gets past a penetration, it reaches the sheathing behind the cladding, which is where hidden damage starts.
How Quickflash Panels Work
A Quickflash panel replaces improvised detailing with a pre-formed, sized part. The panel slides over the pipe, box, or line set, and the WRB laps around it, shingle-style, so water drains outward.
The manufacturer states that its panels:
- Help prevent water intrusion and stop air leakage
- Self-seal around fasteners
- Are non-corrosive and non-conductive
- Eliminate the need for sealants at the penetration (exception: the P-2PS, below)
- Integrate with the building envelope and work with all cladding systems
Performance depends on choosing the correct panel for the box, pipe, or line set and integrating it with the WRB per Quickflash’s installation guides. Compatibility varies by model and wall assembly, so a panel alone doesn’t make a wall watertight.
For contractors, the main advantage is repeatability. When each penetration gets the same factory-formed detail, results depend less on who installed it.
Quickflash HVAC Flashing Panels
HVAC penetrations are some of the largest and most irregular on a building. Line sets are insulated, flexible, and move with temperature changes, and sheet-metal ducts come in many diameters.
A/C Line Set Panels
Choose by insulation tubing diameter (not the copper size) and by cladding:
Model |
Fits |
Seal |
Best For |
Pack |
|---|---|---|---|---|
| A/C U-C “Universal Curved” | 1 1/2"–2 3/4" insulation tubing | Rubber seal | Siding and stucco walls | Box of 4 |
| A/C U-S “Universal Squared” | 1 1/2"–3 1/2" insulation tubing | Tear-out rubber seal | Larger line sets; siding and stucco | Box of 4 |
| A/C U-B “Brick & Cultured Stone” | 1 1/2"–3 1/2" insulation tubing | Tear-out rubber seal | Brick and cultured stone veneer | Box of 4 |
Common mistake: cutting the rubber seal to force a fit. Quickflash’s installation guide says to use the correctly sized panel and not to cut the rubber seal. If the line set is larger than 2 3/4", step up from the U-C to the U-S.
Duct and Vent Panels
Many P-series panels also fit single-wall sheet-metal duct, which makes them the go-to choice for exhaust and HVAC duct penetrations:
Duct Diameter |
Quickflash Model |
|---|---|
| 3" | P-200 |
| 4" | P-300 |
| 5" | P-400 |
| 6" | P-600 |
| 7"–9" | P-800 |
| 10"–11" | P-1000 |
| 12" | P-1200 |
Quickflash also makes the HVTK panel for 2" or 3" PVC horizontal vent termination kits. Call Spycor Building Products to check availability.
Shop Quickflash HVAC & Specialty panels →
Quickflash Electrical Flashing Panels
Electrical penetrations are the trickiest to flash because boxes vary in shape, brand, and depth, and the finish (stucco, siding, EIFS) changes how far the box sits from the sheathing. That’s why Quickflash electrical panels are matched to specific boxes and specific wall depths.
Rule: identify the box manufacturer and part number, then confirm the panel on Quickflash’s Electrical Cross Reference Sheet before ordering.
Electrical Panel Selection by Wall Finish
Wall Finish / Depth |
Model |
Box It Fits (per Quickflash) |
|---|---|---|
| 5/8" depth: 3-coat stucco & lap siding | E-SGB | Specified single gang plastic boxes |
| E-SGB-C 5/8" | Carlon adjustable single gang, #B121ADJ | |
| E-3/0 B | Specified 3/0 plastic boxes | |
| E-4/0 B | Specified 4/0 plastic boxes | |
| 3-coat stucco & lap siding | E-PC 3/0 | Specified pancake 3/0 metal boxes |
| E-PC 4/0 | Specified pancake 4/0 metal boxes | |
| E-SGR | 1/2" raised plaster ring (plastic “P”/”mud” rings) | |
| 7/8": 3-coat stucco & lap siding with rainscreen or furring | E-SGB-A 7/8" | Allied Moulded single gang, #9327-N |
| E-SGB-C 7/8" | Carlon adjustable single gang, #B121ADJ | |
| E-3/0 B-A 7/8" | Allied Moulded #9335-HNK, #9335-HNGK | |
| E-DGB-C 7/8" | Carlon adjustable dual gang, #B234ADJ | |
| 1 3/8": 1-coat stucco & EIFS | E-SGB-A 1 3/8" | Allied Moulded single gang, #9327-N |
| E-SGB-C 1 3/8" | Carlon adjustable single gang, #B121ADJ | |
| E-3/0 B-A 1 3/8" | Allied Moulded 3" round, #9335-HNK, #9335-HNGK | |
| E-DGB-C 1 3/8" | Carlon adjustable dual gang, #B234ADJ | |
| E-4/0SB | Specified 4/0 metal (steel) boxes | |
| Special applications | E-AIB | Arlington InBox™ recessed boxes |
| E-LV | Low-voltage round wire, coaxial cable; electrical pipe through brick and stone |
How to Read Quickflash Electrical Model Numbers
- SGB = single gang box · DGB = dual gang box · 3/0, 4/0 = round/octagon box sizes · PC = pancake box · SGR = single gang plaster ring
- -A = Allied Moulded box · -C = Carlon adjustable box
- 5/8", 7/8", 1 3/8" = finish depth
Common mistake: ordering by box type alone. A 7/8" panel and a 1 3/8" panel for the same box are not interchangeable. The wall finish decides the depth.
Shop Quickflash Electrical panels →
Quickflash Plumbing & Gas Flashing Panels
Plumbing and gas panels are chosen by pipe size. Most fit copper, rigid, and PVC pipe, and the larger models also fit ABS.
Pipe Size |
Model |
Notes (per Quickflash) |
|---|---|---|
| 1/8"–3/8" | P-25 | Also used with low-voltage electrical |
| 1/2"–3/4" | P-50 | Hose bibs, supply lines, gas; also electrical pipe through brick and stone |
| Two 1/2"–3/4" lines, 4" on center | DBL-50 | Tankless water heaters; copper, rigid, PEX, PVC; one panel, two penetrations |
| 1"–1 1/4" | P-100 | Copper, rigid, PVC |
| 1 1/2"–1 3/4" | P-150 | Adds ABS |
| 2"–2 1/2" | P-200 | Adds ABS; also 3" duct |
| 3" | P-300 | Also 4" duct |
| 4" | P-400 | 12 1/2" panel; also 5" duct |
| 6" | P-600 | 12 1/2" panel |
| 8" / 10" / 12" | P-800 / P-1000 / P-1200 | 18 1/2" panels |
| 1/2"–2" copper with exterior tees already attached | P-2PS | Two-piece panel for retrofits; caulking is required at the pipe-to-panel joint |
When to use the DBL-50: tankless water heaters need supply and return lines through the wall. One DBL-50 panel replaces two separate panels and means fewer cuts in the housewrap.
When to use the P-2PS: when a tee is already sweated onto the pipe outside the wall and a one-piece panel can’t slide over it.
Shop Quickflash Plumbing panels →
Quickflash vs. Caulk, Tape, and Pipe Boots
Quickflash Panel |
Caulk / Sealant |
Flashing Tape Only |
Generic Pipe Boot |
|
|---|---|---|---|---|
| How it seals | Factory-formed panel lapped into the WRB | Bead at the joint | Hand-cut, layered tape | Pre-formed round collar |
| Pre-sized to the penetration | Yes, model-specific | No | No | Round pipes only |
| Fits electrical boxes | Yes, box-specific models | Yes | Yes | No |
| Sealant at penetration | Not required (except P-2PS) | It is the seal | Often added | Often added |
| Manufacturer warranty | 10-year limited | Covers product only | Covers product only | Varies |
Bottom line: caulk and tape are field-formed at each penetration. Quickflash panels are factory-formed and sized per model, which makes the detail more consistent across trades.
How to Choose the Right Quickflash Panel: 6 Steps
- Identify the penetration: electrical box, low-voltage wire, pipe, gas line, duct, or line set.
- Measure it: pipe size, duct diameter, or line-set insulation diameter.
- Identify the box (electrical): record the brand and part number, then check the cross-reference sheet.
- Match the wall assembly: 3-coat stucco or lap siding, rainscreen or furring, 1-coat stucco or EIFS, or brick and stone veneer.
- Check special cases: tankless water heater (DBL-50), existing copper tees (P-2PS), Arlington InBox (E-AIB), brick line sets (U-B).
- Confirm the model number against the tables above before adding it to your cart.
Ordering for a Full Job
Quickflash panels are sold by the box, so a quick takeoff prevents both shortages and leftover stock.
Product Group |
Pack Size |
|---|---|
| Electrical panels (E-series) | Box of 12 |
| Plumbing, gas & duct panels (P-25 to P-1200, P-2PS) | Box of 12 |
| DBL-50 tankless water heater panel | Box of 24 |
| A/C line set panels (U-C, U-S, U-B) | Box of 4 |
Takeoff checklist:
- Walk the plans by elevation and count every penetration by type: outlets, hose bibs, gas, water heater, dryer and exhaust ducts, line sets, low voltage.
- Group the electrical boxes by model and finish depth. Different depths mean different panels.
- Group the pipes and ducts by size.
- Round each model up to full boxes.
- On multifamily or production builds, repeat the count per unit type and multiply.
Ordering for multiple units or a mixed set of penetrations? Call Spycor Building Products at (843) 517-8180 with your takeoff and we’ll help confirm the models before you order.
Order Quickflash Panels From Spycor Building Products
Whether you’re flashing exterior outlets on a stucco job, line sets on a brick veneer home, or tankless water heater lines on a multifamily build, there’s a Quickflash panel sized for it.
Frequently Asked Questions
What are Quickflash flashing panels used for?
They flash exterior wall penetrations (electrical boxes, low-voltage wiring, plumbing and gas pipes, sheet-metal ducts, and A/C line sets) so the WRB can be lapped around them.
Which Quickflash panel fits an A/C line set?
Measure the insulation tubing. The U-C fits 1 1/2"–2 3/4"; the U-S fits 1 1/2"–3 1/2"; the U-B fits 1 1/2"–3 1/2" and is made for brick and cultured stone.
Do Quickflash electrical panels fit any box?
No. Each electrical panel fits specific boxes and finish depths. Confirm with Quickflash’s Electrical Cross Reference Sheet.
What’s the difference between 7/8" and 1 3/8" Quickflash electrical panels?
Finish depth. The 7/8" panels are for 3-coat stucco and lap siding with rainscreen or furring strips; the 1 3/8" panels are for 1-coat stucco and EIFS.
Which Quickflash panel do I need for a tankless water heater?
The DBL-50. It has two holes spaced 4" on center for 1/2"–3/4" supply and return lines.
Do Quickflash panels require caulk or sealant?
Quickflash says its panels eliminate sealant at the penetration. The exception is the two-piece P-2PS, which requires caulk at the pipe. All panels must still be integrated with the WRB.
Can Quickflash panels be used with ZIP System sheathing or brick?
Quickflash publishes dedicated installation guides for ZIP System® and brick, and the U-B line set panel is designed for brick and cultured stone. Follow the guide that matches your wall assembly.
How many Quickflash panels come in a box?
At Spycor Building Products, most electrical and plumbing panels come 12 per box, A/C line set panels 4 per box, and the DBL-50 24 per box.
What warranty comes with Quickflash panels?
A 10-year limited warranty from the manufacturer. Review the warranty document for terms.
Where can I buy Quickflash flashing panels?
Spycor Building Products is listed on Quickflash’s official Where to Buy page and stocks the electrical, plumbing, and HVAC lines online at spycorbuilding.com.
