Looking for a low-profile hook fastener that delivers high strength without bulk? VELCRO® Brand HTH High Technology Hook provides a thin, molded hook system engineered for clean aesthetics, lightweight assemblies, and repeatable fastening performance. Paired with compatible low-profile knit loop materials such as VELCRO® Brand Knit Loop 3610, this system offers durable closure strength for consumer goods, electronics, medical devices, soft goods, and general industrial assemblies.
Why Choose HTH High Tech Hook?
HTH (High Technology Hook) uses precision-molded hook geometry. This provides a thinner, sleeker profile compared to traditional woven hook systems. Applications where engineers and fabricators choose HTH include:
● Wearable and soft-goods manufacturing where low profile and comfort matter
● Electronics and OEM components requiring lightweight, repeatable closures
● Medical and orthopaedic devices, splints, and supports
● Industrial displays, packaging, and specialty assemblies
The molded construction offers consistent tensile strength, reliable shear performance, and long-term durability even in demanding environments. HTH also excels where space constraints or product aesthetics make standard hook too bulky.
Technical Specifications
Hook Construction
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Molded, low-profile hook design for controlled engagement and long cycle life.
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Compatible with low-profile loops including VELCRO® Brand Knit Loop 3610 and 3905.
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Provides balanced shear and peel performance suited for general fastening, lightweight mounting, soft goods, and device strap systems.
Adhesive Backing Options
Choosing the right adhesive is critical. Hook performance depends on correct substrate pairing, surface energy, environmental exposure, and long-term durability. Below is a clearer technical breakdown of the three common adhesive options supplied on HTH products:
Acrylic Adhesive 72
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Type: High-performance acrylic
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Use: Indoor/outdoor
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Best For: Stainless steel, aluminium, glass, painted metals, paper, nylon, polyester
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Notes:
● Excellent UV and solvent resistance
● Good for high-surface-energy (HSE) materials
● Avoid low-surface-energy (LSE) plastics such as polyethylene, polypropylene, polystyrene, acetal -
Ideal for harsh environments requiring long-term shear strength and temperature stability.
Acrylic Adhesive 19
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Type: All-purpose acrylic
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Use: Indoor/outdoor
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Temperature Range: Designed for moderate temperature and moisture exposure
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Notes:
● Adheres to most common substrates except vinyls long-term
● Higher cost than 15, but more versatile and durable -
A balanced performance option for general OEM and fabrication work.
Rubber Adhesive 15
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Type: High-tack rubber
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Use: Indoor only
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Best For: Cardboard, plastics (excluding vinyls), painted surfaces, and general-purpose bonding
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Notes:
● Excellent initial tack
● Not recommended for glass, vinyl, or outdoor environments -
A cost-effective choice for short-term, indoor consumer or light industrial applications.
Hook and loop are sold separately.
Application Guide
To maximise adhesive strength and ensure predictable fastening performance:
1. Surface Preparation
● Clean with 50/50 isopropyl alcohol and water.
● Ensure the surface is dry and free from dust, oils, or mould-release agents.
● For difficult substrates (LSE plastics, textured surfaces), consider using a primer or switching to a more appropriate adhesive system.
2. Application Pressure
Apply firm, even pressure across the entire adhesive area. This improves wet-out and increases initial bond strength.
3. Cure Time
Acrylic adhesives reach full strength after 24–72 hours, depending on temperature and humidity. Rubber adhesives achieve handling strength immediately.
4. Mating the Fastener
Pair HTH hooks only with compatible low-profile loops such as Knit Loop 3610 for optimal shear and peel strength.
FAQs
Is HTH High Tech Hook removable?
The hook itself is removable. However, adhesive-backed versions depend on the chosen adhesive. Rubber adhesives are easier to remove. Acrylic adhesives provide long-term, high-strength bonds and may require heat or adhesive remover for clean removal.
Does HTH adhere to powder-coated surfaces?
Acrylic 72 and 19 generally bond well to most powder coats due to their higher surface energy. Always test first because powder-coat chemistry varies significantly.
Can I use HTH outdoors?
Yes, with acrylic adhesives (72 or 19). Rubber adhesive 15 is not suitable for outdoor exposure.
What loop should I pair with HTH?
For best performance choose VELCRO® Brand Knit Loop 3610 or other low-profile loops designed for molded hook engagement.