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H21 2 Part Expanding Spray Foam Kit

Canister

H21 2 Part Expanding Spray Foam Kit

Fast, portable, and built for performance, Tensorgrip® H21 delivers high-density foam expansion for sealing, filling, and structural reinforcement.

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Overview

Tensorgrip® H21 is a professional 2-part expanding PU foam system designed for demanding sealing, insulation, and repair applications. Purpose-built for hard rock mining, construction, and industrial environments, Tensorgrip® H21 forms a durable closed-cell structure with over 92% density. Ideal for sealing voids, ventilation structures, cable bolt holes, and small cavity filling, it is also suitable for insulation, renovations,move props and special effects work.

Manufactured in Australia, Tensorgrip® H21 offers reliable expansion, strong adhesion, and a fast dry time in a portable, easy-to-use kit.

Sizes

7L Canister
22L Canister

Registered
brand of

Applications

Main applications

Drywall/plasterboard
Timber/wood

See all applications in our Technical Data Sheet

How to use

Surface Preparation
Ensure surfaces are clean, dry, and free from dust, oil, or grease. Substrates should be above 16°C for at least 24 hours before application.
Setup
Shake the canisters well. Connect hoses and spray gun securely. Check all fittings for leaks.
Application
Apply only between 16°C–32°C. Variations outside this range can significantly affect adhesion and foam yield.
Bonding
Allow adhesive to tack until touch-dry. Align and press surfaces firmly together. Initial bond allows immediate trimming; full strength is achieved in 1–3 days.
Clean-Up
Surface Preparation

Ensure surfaces are clean, dry, and free from dust, oil, or grease. Substrates should be above 16°C for at least 24 hours before application.

Setup

Shake the canisters well. Connect hoses and spray gun securely. Check all fittings for leaks.

Application

Apply only between 16°C–32°C. Variations outside this range can significantly affect adhesion and foam yield.

Bonding

Allow adhesive to tack until touch-dry. Align and press surfaces firmly together. Initial bond allows immediate trimming; full strength is achieved in 1–3 days.

Clean-Up

If wet foam contacts skin, remove immediately with a dry rag—do not use water. If dried, apply petroleum jelly, wear gloves, and wait 1 hour. Do not use acetone on skin.

Cured foam must be removed mechanically; uncured foam can be cleaned with foam cleaner or acetone.