Heritage Sealed Units

Installation Guide

Glazing of Heritage Sealed Units® manufactured by JCL Glass Ltd should always be carried out in accordance with the principles and recommendations of the Glass & Glazing federation. When glazing it is important to prevent the ingress of water into any rebate to retain the integrity of the seal. Do NOT use linseed oil putties or butyl glazing compounds that comes into contact with the units’ edge seal when installing Heritage Sealed Units®.

Recommended Products

Heritage Sealed Units® should be manufactured with the following products:

  • Hodgson Heritage Putty
  • Hodgson Silfix U9

Recommended Max Unit Sizes

  • 4mm Cavity – 600 x 600mm
  • 6mm Cavity – 750 x 1000mm
  • 8mm Cavity – 750 x 1200mm

​Note: Due to potential glass deflection with narrow unit cavities; effective maximums will also vary with different cavity fills.

Surface Preparation

All surfaces must be clean, dry and free from frost, grease and loose materials. Apply primer if required. In situations where an especially neat finish is required, use masking tape to cover the face edges of the joint and remove immediately once tooling has been completed.

Note: Hodgson Heritage Putty working time 10 mins / skinning time 20 min.

Heritage Sealed Units® will be guaranteed for five years providing they are installed in strict accordance with the recommendations above and of the Glass & Glazing Federation​.

Hodgson Silfix U9 Method

  1. Bed the Heritage Sealed Unit® into the frame using Silfix U9 and fill voids.
  2. Use 2mm setting block to adjust unit
  3. Make sure silicone protects the sealant of the unit.
  4. Allow the Hodgson Silfix U9 to develop a tack free skin.
  5. Finish with Hodgson’s Heritage putty.

Hodgson Heritage Putty Method

  1. Fully bed the Heritage Sealed Unit® into the frame using Heritage putty.
  2. Use 2mm setting block to adjust unit.
  3. Make sure no edges of the unit are exposed.
  4. Finish with Hodgsons Heritage putty.
  5. Apply small fillet of Heritage putty around the internal “joint” to prevent moisture entering the glazing rebate.
  6. Paint must be applied once putty has set.

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Talk to the experts

For all bespoke sealed units offered in a range of specifications to meet any glazing requirements. ​Get in touch with JCL Glass today.

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If you'd prefer to talk to someone from the JCL Glass team than you can call us on 01296 437778.