Warm Glass website

Information from the archives of the Warm Glass website and bulletin board.

Tips by Date                          Tips by Category    

Warm Glass website

WG Bulletin Board

Kiln Shelves for Large Kilns

Since the largest mullite kiln shelves commonly available are approximately 2 feet by 2 feet (61cm by 61cm), larger kilns are often outfitted with several kiln shelves, rather than one large shelf.  This arrangement works well when fusing smaller items, but the seams between the shelves make it difficult (if not impossible) to successfully and cleanly fuse items that are larger than the individual kiln shelves.  As a result, a number of different solutions to the large kiln shelf problem have been attempted.  Here's a list of possibilities:

Hiding the seams:

  1. Fiber paper over the shelves

  2. Refractory paste to fill in seams

  3. Refractory scraps to cover seams (and add texture)

Alternative shelf materials:

  1. Fiber board, vermiculite board, similar products in stock sizes (typically 2 feet by 3 feet/61cm by 91 cm)

  2. Custom sizes of fiber board and similar products

  3. Rigidized fiber blanket

  4. Moldable papers and boards (i.e., Zircar's RS100 board)

  5. Stainless steel

  6. Castable refractories

  7. Leveled sand

  8. Plaster/diatomeacous earth/vermiculite/alumina mixtures

As you would expect, some of these alternatives work fairly well, while others come with a different set of problems.  Click here to go to the next part of this series, which deals with solutions that hide the seams between kiln shelves in the larger kiln.


Copyright 2006 Brad Walker.  All rights reserved.

Most of these tips came from posters on the Warm Glass bulletin board. 

Click here to sign up to receive daily updates for the Warm Tips website.  These updates will come via email and will alert you as new tips are posted.


Got a tip to pass along?

Or a tip you'd like to see?

Four Corners International, Inc.

4140 Clemmons Road, #320

Clemmons, NC  27012   USA

Copyright 2005-2006 by M. Bradley Walker.  All rights reserved.

Designed, implemented, and published by Four Corners International, Inc.