Legacy Pro sealants are positioned by product category and application, based on a review of published technical data sheets (TDS) from leading manufacturers. Comparisons are intended to help users identify the appropriate product category—not to claim chemical equivalence.

HP1 – All-Purpose 100% Silicone (Neutral Cure)

HP1 aligns with all-purpose, neutral-cure 100% silicone sealants used for interior and exterior detail work, kitchens, baths, windows, doors, and general construction joints.

Comparable category references include GE Advanced 100% Silicone all-purpose and window & door product lines.

HP2 – Interior 100% Silicone (Kitchen & Bath)

HP2 is optimized for interior kitchen, bath, and finish applications requiring a permanent, waterproof, mold-resistant seal.

HP2 aligns with interior kitchen & bath 100% silicone sealants, such as GE Advanced 100% Silicone Kitchen & Bath.

HP3 – Exterior 100% Silicone (Glazing / Window & Door)

HP3 is an acetoxy-cure exterior glazing silicone designed for exposed glass-to-glass and glass-to-metal joints.

HP3 aligns with exterior window & door and glazing-grade 100% silicone sealants, including GE Advanced 100% Silicone Window & Door

HP4 – Exterior Hybrid Polymer Construction Sealant

HP4 aligns with high-performance exterior hybrid polymer (SMP/MS) construction sealants used for siding, trim, window perimeters, masonry interfaces, and general construction joints.

Comparable category references include:

• OSI Quad Max
• DAP Spec Line 800

HP4 may also be considered a functional, application-based alternative to certain polyurethane construction sealants—such as Sika NP-1—in many exterior construction and roofing detail applications. These products differ in chemistry.