Why You're Seeing HP4

Contractors across the country are evaluating HP4 to understand:

• Performance in real job-site conditions
• Consistency across different installers
• Cost predictability, especially around bead size and usage

Your feedback directly supports this evaluation.

  • Kitchen and Bath Sealants

    Clean finishes that last. High-performance sealants built for kitchens, baths, and every wet zone in between.

    SHOP INTERIOR 

  • Exterior Envelope Sealants

    Seal out the elements. Professional exterior sealants engineered for weatherproof protection and flexibility.

    SHOP EXTERIOR 
SHOP ALL PRODUCTS

Why Us?

Legacy Pro was founded by Pete and Mark Longo — long-time leaders in the professional sealants industry.

Our experience includes:

  • 40+ years developing and managing pro-grade exterior sealants
  • Members of the founding family behind OSI® and part of the leadership team during its major growth and innovation era
  • Direct involvement in shaping many of the performance standards installers rely on today (from chemistry evolution to installer training, color programs, and category education)

Legacy Pro is the next evolution of that experience — engineered for consistency, clean finishing, and real-world reliability.

HP4

Built for Today's Installers

Consistent 3/8” Bead with the V-Notch Nozzle

  • Creates a clean, uniform bead
  • Helps reduce over-application
  • More predictable usage from crew to crew
  • Cleaner finishing lines

(A simple solution to one of the biggest sources of material variability.)

50% Movement Capability

  • Handles seasonal expansion & contraction
  • Designed for exterior joints and siding transitions
  • Reliable long-term flexibility

All-Weather Application

  • Applies cleanly in cold, damp, or humid conditions
  • Hybrid polymer chemistry maintains flow and tack-free time
  • Reduces rework when weather shifts mid-install

Exceptional Cut-Off & Smooth Finish

  • Sharp stop at the end of the pull
  • Minimal stringing
  • Faster cleanup and straighter lines

Clear That Stays Clear

  • Hybrid clarity that resists yellowing
  • Clean look on trims and siding transitions

Strong Adhesion to the Materials You Use

  • Vinyl
  • PVC / composite trim
  • Aluminum
  • Fiber cement
  • Engineered woods
  • Painted surfaces

How to Evaluate HP4

Use HP4 anywhere you currently use a hybrid exterior sealant:

  • Window installs
  • Trim and finish details
  • Siding transitions
  • Movement joints

What to look for:

  • Bead consistency with the v-notch
  • Clean cut-off
  • Smooth tooling
  • Clarity of the Clear
  • Cure speed vs. dirt/weather
  • Overall job-site handling

Why a Direct-to-Contractor Model Matters

Legacy Pro is built around a lean, focused platform — without layers of national distribution, retail programs, or large field organizations.

That means:

  • Streamlined communication
  • Simple color programs
  • Less overhead
  • More value reaching the installer

A modern approach built on decades of category experience.

A Message from Our Founders

Thanks for giving HP4 a fair evaluation.

We’ve spent our careers supporting installers and developing the products they rely on. Our goal with Legacy Pro is simple: dependable performance, clean installs, and consistent results from crew to crew. Your honest feedback means a lot.”

— Pete & Mark Longo, Co-Founders

How much can you save?

Savings depend on volume, but most customers save 20–40% compared to comparable professional brands by purchasing direct from Legacy Pro.

Savings Calculator

Estimate annual savings based on your selected product, surface type and homes completed.

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