Features and Benefits

  • Easy peel & stick application – no fastener punctures
  • Poly facer provides excellent foot traction and adhesion to cap sheet
  • Designed for use with Boral TileSeal®HT, Boral® MetalSeal HT and GatorSeal®
  • Install in high winds
  • No special tools or hot asphalt needed
  • Excellent moisture resistance and thermal stability
  • SBS modified asphalt core self-seals nail penetrations

Citadel® Plus Brochure

Citadel® Plus Installation Guide

Citadel® Plus Warranty

Citadel® Plus Florida Approval FL14317 R-11

Citadel® Plus SDS

Order Sample

Self-Adhering Base Sheet

Citadel® Plus SBS modified asphalt core self-seals around nail or screw penetrations when mechanically fixing roofing. Seals to the roof deck providing additional security against potential leaks compared to mechanically fastened base sheets.

Peel & Stick application requires no special tools, no hot asphalt for hot mopping.

The poly faced surface designed to provide foot traction and maximum adhesion of Boral cap sheets:

  • Boral TileSeal® HT – Boral’s strongest, most durable underlayment for tile, metal, shingle, shake or slate roofing
  • GatorSeal®- granular surfaced SBS modified asphalt underlayment with heavy-duty fiberglass reinforcement for strength and durability


Citadel® Plus has a manufacturer’s limited warranty when used with Boral Roofing’s cap sheet underlayments:

  • 30 year warranty when installed as a base sheet under Boral TileSeal® HT
  • 20 year warranty when installed as a base sheet under GatorSeal®