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Butyl tape is a compressible bedding seal used behind RV window frames, vents, doors and trim—not a visible topcoat or a promise of permanent waterproofing. Choose width to match the flange, thickness to allow controlled squeeze-out, and a formulation compatible with the roof membrane, metal, plastic or glass involved. Remove old material, prepare the surfaces as the component maker specifies, and use the appropriate exterior sealant where the installation calls for one.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | Dicor BT-1834-1 Butyl Seal Tape | $8-$15 | Amazon · eBay |
| 2 | XFasten Butyl Seal Tape 3/4 in × 30 ft | $17-$22 | Amazon · eBay |
| 3 | RecPro RV Butyl Tape 1 in × 30 ft | $14-$20 | Amazon · eBay |
| 4 | RecPro Gray Butyl Tape 1 in × 30 ft Two-Pack | $24-$30 | Amazon · eBay |
| 5 | Kohree Butyl Tape White 3/4 in × 30 ft | $10-$18 | Amazon · eBay |
| 6 | AP Products Cap Tape 018-316130 | $28-$35 | Amazon · eBay |
| 7 | Dicor Butyl Seal Tape 3/16 in × 3/4 in × 20 ft | $8-$15 | Amazon · eBay |
| 8 | Kohree Butyl RV Sealant Tape White 3.4 in × 30 ft | $14-$20 | Amazon · eBay |
| 9 | RecPro RV Window Install Kit with Butyl Tape | $28-$38 | Amazon · eBay |
| 10 | RecPro Gray Butyl Tape 1 in × 30 ft Five-Pack | $45-$60 | Amazon · eBay |
The picks, in detail
Dicor BT-1834-1 Butyl Seal Tape
A 1/8-inch thick, 3/4-inch wide, 30-foot Dicor roll for bedding RV windows, vents, frames and irregular joints.
- 1/8 inch thick
- 3/4 inch wide
- 30 foot roll
- RV window and vent use
- Current Dicor listing showed $8.24
- Narrow width suits many trim flanges
- Too narrow for a flange that needs full 1-inch coverage
XFasten Butyl Seal Tape 3/4 in × 30 ft
A black 1/8-inch-thick, 3/4-inch-wide, 30-foot butyl roll for RV and vehicle sealing jobs with a narrow flange.
- 1/8 inch thick
- 3/4 inch wide
- 30 foot roll
- black butyl
- Current XFasten price was $19.39
- Standard narrow-roll dimensions are easy to compare with existing sealant
- Black squeeze-out can be more visible on a light-colored flange
RecPro RV Butyl Tape 1 in × 30 ft
A 1/8-inch-thick, 1-inch-wide, 30-foot non-hardening RecPro roll for windows, baggage doors, entry doors and roof vents.
- 1/8 inch thick
- 1 inch wide
- 30 foot roll
- non-hardening butyl
- Current RecPro price was $15.95
- One-inch width suits many RV window and vent flanges
- Expect trim-out after compression; it is a bedding material, not a finished bead
RecPro Gray Butyl Tape 1 in × 30 ft Two-Pack
The two-roll RecPro version of the 1/8-inch by 1-inch by 30-foot gray butyl tape for multiple frames or a larger resealing job.
- two 30 foot rolls
- 1/8 inch thick
- 1 inch wide
- gray butyl
- More material for several openings
- Same familiar flange-friendly dimension
- Buy only enough tape for the planned work because storage heat can make rolls harder to handle
Kohree Butyl Tape White 3/4 in × 30 ft
A white 1/8-inch by 3/4-inch by 30-foot RV putty-style butyl roll for narrow window, boat and RV trim sealing work.
- 1/8 inch thick
- 3/4 inch wide
- 30 foot roll
- white butyl
- White material can blend better beneath white trim
- Budget-size roll for a single opening
- Confirm the component maker accepts butyl on the specific roof or wall surface
AP Products Cap Tape 018-316130
A gray cap tape in a thicker 3/16-inch by 1-inch by 30-foot format, intended where the joint needs more compressible material than a 1/8-inch roll.
- 3/16 inch thick
- 1 inch wide
- 30 foot roll
- gray cap tape
- Current PartsWarehouse price was $30.57
- Thicker profile helps fill a larger flange gap
- More thickness can create more squeeze-out and requires careful tightening
Dicor Butyl Seal Tape 3/16 in × 3/4 in × 20 ft
A thicker Dicor roll format for a short repair where 3/16-inch thickness is preferable to the standard 1/8-inch bedding tape.
- 3/16 inch thick
- 3/4 inch wide
- 20 foot roll
- Dicor RV seal tape
- Thicker option for an uneven flange
- Short roll limits leftover material
- 20 feet may be insufficient for a large window or multiple vents
Kohree Butyl RV Sealant Tape White 3.4 in × 30 ft
A wide 3.4-inch by 30-foot Kohree butyl RV sealant tape for broader repair coverage than a narrow bedding strip.
- 3.4 inch width
- 30 foot roll
- white butyl
- RV repair application
- Broad roll covers wider seams
- Current Kohree listing showed $15.99
- Wide tape is not a substitute for selecting the right flange-bedding width
RecPro RV Window Install Kit with Butyl Tape
A RecPro kit pairing butyl tape with non-sag RV sealant for a window installation where the component instructions call for both bedding and an exterior finish seal.
- butyl tape included
- non-sag sealant included
- window-installation kit
- RV-specific components
- Current RecPro price was $31.95
- Pairs two different materials for their different jobs
- Use the sealant only where the window and RV makers specify it
RecPro Gray Butyl Tape 1 in × 30 ft Five-Pack
A five-roll RecPro pack for a renovation involving multiple windows, vents, doors or long runs of trim, using the same 1/8-inch by 1-inch profile.
- five 30 foot rolls
- 1/8 inch thick
- 1 inch wide
- gray butyl
- Bulk quantity suits multi-opening projects
- Consistent tape profile across the job
- Large pack is excessive for one small vent replacement
Buying tips
- Measure the flange and dry-fit the part before choosing tape width; a roll that is too narrow leaves gaps and one that is too wide makes cleanup harder.
- Apply to clean, dry surfaces at the temperature range specified by the tape and component manufacturers, then tighten fasteners evenly in stages.
- Trim squeeze-out with a plastic tool after the joint is seated and inspect the exterior sealant and fasteners as part of routine RV maintenance.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.