Perm-A-Barrier S100 sealant: 20oz sausage


  • No primer—fast and easy application with minimum surface preparation
  • No staining or residue rundown
  • High movement capability
  • Adhesion—Strong adhesion to common construction substrates, such as wood, block, concrete, OSB, glass mat sheathing, metal, vinyl and PVC
  • Compatibility—Compatible with most GCP air and weather barrier systems

242 in stock (can be backordered)

SKU: 114175 Categories: , ,


Perm-A-Barrier S100 sealant is designed for a variety of uses with GCP Applied Technologies’ air and weather barrier systems.

S100 Sealant is ideally suited for the following uses:

  • Sealing of finished terminations, edges of patches and overlaps in detail areas
  • Sealing penetrations through GCP air and weather barrier systems, such as plumbing or ductwork
  • As a sheathing joint treatment for GCP fluid-applied air and weather barrier membranes
  • For sealing between window flanges and the air and weather barrier system.

Surface Preparation

All surfaces must be clean, dry and free from dirt, grease oil, dust or other contaminants. S100 Sealant may be applied at temperatures above 20°F (-6.67°C) and above.


Apply Perm-A-Barrier S100 Sealant with a caulking or sausage gun. When used as a seal for finished terminations, edges of patches and overlaps in detail areas, level the bead with a trowel to a minimum 0.125 in. (3 mm) thickness and 0.5 in. (13 mm) to 1 in. (25 mm) width.

When sealing penetrations, apply a 1 in. (25 mm) fillet to the base of the penetration and overlap onto the GCP air and weather barrier material and penetrant a minimum of 2.5 in. (64 mm).

When used to treat sheathing joints for GCP fluid-applied air and weather barrier membranes, completely fill the sheathing joint with sealant and then install a scratch coat of sealant with a margin trowel or similar onto the face of the sheathing approximately 1 in. (25 mm) on each side of the sheathing joint. Once the sealant is tack free, the fluid applied membrane may be applied, refer to the applicable product data sheets for detailed application instructions.

Clean Up

Clean tools and equipment with mineral spirits. Mineral spirits is a combustible liquid and should be used only in accordance with the mineral spirits manufacturer’s safety recommendations. Do not use solvents to clean hands or skin.

Shelf life: 12 months if stored properly

Perm-A-Barrier S100 sealant safety data sheet

Additional information

Weight .75 kg
Dimensions 30.48 × 5.08 × 5.08 cm

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