Ultraseal® P-201A Hydro-Reactive Mastic | Tremco

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Ultraseal® P-201A

Hydro-Reactive Mastic

Ultraseal® P-201A

Hydro-Reactive Mastic

A high-performance hydro-reactive mastic for sealing and waterproofing passing bodies and cracks. Ultraseal P-201A will expand up to two times (100%) by volume in the presence of water, in the direction of least resistance. When expansion is inhibited, Ultraseal P-201A will produce expansion pressure against the resisting substance, effectively sealing off water penetration.

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Benefits of Using Ultraseal® P-201A in Your Next Project

Hydro-Reactive Waterproofing

Expands up to two times (100%) by volume to produce expansion pressure and seal off water penetration

Streamlined Installations

Can create a waterproof seal even in damp conditions and uneven surfaces

Versatile Use

Can be used with TREMproof® Amphibia™ system, control joints, expanded metal forms, penetrations, crack/joint repair and more

Easy Installations

Installs easily, and works in a wide range of temperatures and ground water conditions

Ultraseal® P-201A Is Best For

TREMproof® Amphibia™ system
Control joints
Expanded metal forms
Piping penetrations

Crack and joint repair
Sheet pile interlock sealant
Precast segmented sealant

Product Properties

Volumetric expansion in water	Approximately 100% (2 times by volume)
Polymerization @ 68 °F (20 °C), 60% RH	<10 hr

Ultraseal® P-201A Resources

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Product Literature

Technical Bulletin

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