SIGA Fentrim® 430 Grey - High Performance Adhesive Tape - 6" x 82' Roll
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SIGA Fentrim 430 Grey – The Best Primer-Free Flashing Tape for Air & Weather Sealing
Overview
SIGA Fentrim® 430 Grey is a high-performance self-adhered flashing tape designed for superior air sealing and weatherproofing in building construction. It creates a continuous air barrier while protecting exterior joints from water infiltration. This primer-free, fleece-backed tape bonds directly to rough surfaces like concrete, masonry, and wood—without extra prep.
Key Benefits:
- ✅ Primer-Free Adhesion – Sticks directly to concrete, OSB, and masonry with no primer.
- ✅ All-Weather Application – Bonds in cold temperatures (down to 14°F) and extreme heat.
- ✅ Flexible & Durable – Fleece backing prevents wear and conforms to irregular surfaces.
- ✅ Waterproof Yet Breathable – Blocks bulk water while allowing vapor permeability to prevent trapped moisture.
- ✅ Easy to Apply – Split-release liner for quick, precise installation.
Why Choose SIGA Fentrim 430?
🔹 No Primer Needed – Save Time & Effort
Unlike most flashing tapes, Fentrim 430 sticks directly to masonry and concrete without a primer, eliminating an extra step. This saves time on the job and ensures a reliable seal even on rough surfaces.
🔹 Superior All-Weather Adhesion
Fentrim 430 outperforms traditional butyl and asphalt tapes in cold and hot conditions. It applies down to 14°F (-10°C) without losing adhesion, while other tapes become brittle or require a heat gun.
🔹 Heavy-Duty Construction for Long-Term Performance
The fleece-backed carrier layer makes Fentrim more durable than plastic-backed flashing tapes. It resists abrasion, UV exposure (up to 4 months), and jobsite wear and tear, ensuring a long-lasting, airtight seal.
🔹 Waterproof but Vapor-Permeable
Fentrim 430 is watertight yet breathable, allowing walls to dry while blocking bulk water. Competing tapes like Grace Vycor® or Protecto Wrap® are fully vapor-closed, which can trap moisture and lead to long-term issues.
🔹 Easier Installation – No Mess, No Hassle
Fentrim features a split-release liner, making it easy to apply in tight areas and corners without fighting the tape. The high-tack acrylic adhesive grips instantly, unlike some flashing tapes that require excessive pressure or re-rolling.
Frequently Asked Questions (FAQ)
Q: What surfaces does Fentrim 430 bond to?
A: Fentrim 430 bonds to nearly any substrate—including concrete, wood, OSB, metal, and masonry—without needing primer.
Q: Can it be applied in extreme temperatures?
A: Yes! It applies down to 14°F (-10°C) and remains stable in high heat up to 212°F (100°C), making it an all-season flashing tape.
Q: How does Fentrim compare to standard flashing tapes?
A: Unlike asphalt and butyl-based tapes (e.g., Grace Vycor®), Fentrim 430 is vapor-permeable, ensuring walls can dry properly. It also doesn’t require primer, sticks to more surfaces, and handles extreme temperatures better.
Q: What widths are available?
A: Fentrim 430 comes in 4", 6", and 9" rolls, making it ideal for window flashing, sheathing-to-foundation sealing, and more.
Q: Is the higher cost of Fentrim 430 worth it?
A: Yes, we believe so—especially for critical air sealing. While cheaper tapes may fail over time, Fentrim 430 provides a long-lasting, airtight, and waterproof seal that helps avoid costly callbacks.
Get a Reliable Air & Weather Barrier with SIGA Fentrim 430
For contractors who demand performance, durability, and ease of installation, Fentrim 430 is the best flashing tape available. It outperforms traditional flashing products, requires no primer, and excels in any weather—giving you faster installs and long-term peace of mind.
Order now or contact us for bulk pricing and availability.