EPDM rubber repair membrane
533RM-6 — EPDM roof repair membrane — 6 in × 25 ft
Self-adhesive EPDM repair strip; manufacturer directs that the perimeter be finished with suitable lap sealant.
View partDicor RV Roof Repair Tapes — EPDM, TPO & Aluminum Parts Guide
Compare Dicor roof-repair membrane, TPO-faced DiSeal tape and aluminum-faced DiSeal tape by their actual backing, dimensions and manufacturer's part numbers. These products are repair layers, not substitutes for an approved roof replacement, termination molding, under-flange butyl or sealant system.
Original manufacturer photographs and repair instructions
Use the Dicor EPDM repair membrane instructions, DiSeal TPO/foil specification and installation guide, and manufacturer's illustrated roofing catalog (repair tapes section). Compare the repair materials below with Dicor's product specifications and roof-system installation instructions.
Identify your repair material
533RM-6 and 533RM-12 are self-adhering EPDM strips in 6- or 12-inch widths and 25-foot rolls. Dicor calls for sealing the exposed patch perimeter with approved lap sealant.
522TPO-4125-1C, 522TPO-425-1C and 522TPO-450-1C are different lengths of 4-inch white TPO-backed DiSeal. Confirm the full manufacturer package suffix before selecting.
522AF-450-1C has an aluminum foil surface and is not the same TPO backing as 522TPO products. Match the repair substrate and required finish.
Both product families require a clean and dry substrate. Avoid stretching the tape, trapped air, open edges and unsupported coverage across large damaged areas.
Compare Dicor roof repair tapes
EPDM rubber repair membrane
533RM-12 — EPDM roof repair membrane — 12 in × 25 ft
Wider self-adhesive EPDM repair membrane. Do not piece multiple strips together in butt joints to cover a broad area.
View partAluminum-faced DiSeal
522AF-450-1C — DiSeal aluminum-faced tape — 4 in × 50 ft
Aluminum-facing and grey adhesive backing. Manufacturer describes a different operating and application range than TPO-backed DiSeal.
View partDiSeal roll lengths and foil patch sizes
For white TPO-backed DiSeal tape, Dicor offers 522TPO-4125-1C in a 4-inch × 12½-foot roll, 522TPO-425-1C in a 4-inch × 25-foot roll, and 522TPO-450-1C in a 4-inch × 50-foot roll. 522AF-66-1C is a separate 6 × 6-inch aluminum-faced patch, not a roll. Choose the correct backing, width and package length using the complete manufacturer part number.
Manufacturer application differences
533RM EPDM strips: Dicor says to extend the repair membrane at least two inches beyond each side of the damaged area and to seal around the perimeter. It warns against placing strips end-to-end or side-to-side with a butt joint to cover a large area.
DiSeal tapes: Dicor instructs installers not to stretch the tape, to apply in the correct position initially, and to work air bubbles and fishmouths out with pressure. Temperature and preparation requirements differ between TPO-backed and aluminum-backed versions; consult the manufacturer's specific product directions.
Companion roof installation references
For butyl under roof-vent flanges, termination molding and roof lap sealant, see the roof termination and flange sealing guide. For the screws and tapes supplied with roof-vent kits, use the roof-vent installation-kit comparison. You can also browse aluminum roof-edge molding or RV roof repair materials.
Safety: Patches cannot replace rotted decking or structural repairs. Identify the roof membrane and follow the manufacturer-approved procedure. Do not access an unsupported or slippery roof without the appropriate precautions.
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