We are still able to fill and ship orders. We are open M-F 8am-2pm FOR PICK UP ORDERS ONLY. All orders must be placed in advance. We are monitoring all voice mail and email 24/7.

Please contact us if you would like more information: 612-331-1345 or

Smith-Sharpe Fire Brick Supply Logo

"Everything for your Kiln"

We offer a complete line of kiln building materials for your next new project or repair. We specialize in helping customers find solutions for their specific kiln projects. Our team has many years of experience working with artists, educators and kiln builders; helping them find the right products for their applications. Please feel free to contact us with your questions.

Wood fired kiln during firing.


Smithfield Medium Duty

Temperature use limit of 2700 F. Ideal for use in chimney and subfloors.

9" x 4.5" x 2.5" Straight $2.51 ea
9" x 4.5" x 1.25" #1 Split $2.39 ea

Smithfield Data PDF

Jet D.P. High Duty

Temperature use limit of 2850 F. Good all­-around choice for walls and arches.

9" x 4.5" x 2.5" Straight $4.26 ea
9" x 4.5" x 1.25" #1 Split $3.86 ea

Jet D.P. Data PDF


Temperature use limit of 2910 F. Used in high abrasion areas such as floors, burner ports, door sills and flue openings. Best choice for bag walls and as posts where brick is surrounded by heat.

We offer custom cutting of super duty Soaps for posts.

9" x 4.5" x 2.5" Straight $4.55 ea
9" x 4.5" x 1.25" #1 Split $4.40 ea
9" x 2.25" x 2.5" Soap $4.32 ea

Clipper Data PDF

Hard Fire Brick.

IFB 2300

Temperature use limit of 2300 F (mean temp max 2100 F). Low density, low strength. Good for back-up and some hot face applications.

9" x 4.5" x 2.5" Straight $3.65 ea

IFB 2600

Temperature use limit of 2600 F (mean temp max 2200 F). Medium density, medium strength. Good for hot face applications and shapes such as Arch and Wedge.

9" x 4.5" x 2.5" Straight $4.70 ea

BNZ Summary Data PDF

Brick Shapes and Dimensions PDF

Brick Installation Guide PDF

Insulating Fire Brick.

High Duty and Super Duty Tile

We stock Square Edge and Ship Lap Tile in a variety of sizes and thickness including but not limited to: 12”x12”, 12”x24”, 12”x15”, 12”x18” and from 1.5”, 2”, 2.5” and 3” thick. Used mainly for floors.

Call for price and availability.

High Duty Tile Data PDF

Super Duty Tile Data PDF

Square Edge Tile


Gas Kiln Structural Repair

We repair kiln arches, floors, doors, cars, etc.

Contact Us for your specific repair or modification project.


CRYSTOLON® SiC RC4128 Kiln Shelves

Conventional, ram pressed silicon carbide shelves are the traditional “work horse” shelves used by potters firing to cones 9-12 in natural gas, propane, wood and multi-fuel kilns. Our traditional silicon carbide shelves are oxide bonded and over the last 40 years have proven to be a sound investment providing years of service life in demanding firing applications including gas reduction, wood, soda and salt.

Call for price and availabilty.

More on CRYSTOLON® Kiln Shelves at



ADVANCER® Nitride-Bonded Silicon Carbide CN-703 Kiln Shelves

ADVANCER kiln shelves are 19 times stronger, and weigh 50% less than conventional 1” thick cordierite kiln shelves and are made flat to stay flat so there’s no warping even after many firings under heavy loads. Advanced nitride-bonded silicon carbide (NSiC) is distinguished from conventional nitride-bonded silicon carbide in that it is significantly stronger, thinner and much more resistant to oxidation; suitable for temperatures up to 2600°F!

Call for price and availabilty.

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CRYSTON® TW Kiln Shelves

The cost effective alternative to our Advancer® shelves for a variety of firing applications including Reduction, Soda and Wood firings. Cryston® TW is not recommended or suitable for use in electric kilns due to high electrical conductivity rate. Cryston® TW shelves are slip cast nitride bonded SiC made from fine grained mix used to manufacture beams, posts, plates and unique shapes with sections from 6.4- 10mm. They are part of our exclusive LO-MASS® product line that offers thinner, light and stronger products.

Call for price and availabilty.

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We offer custom cut kiln shelves by special order.



Wet, air setting high temperature general purpose, economical refractory mortar. Should be thinned with water. Max service temperature 3000 F.

$50.26 / 55 lb pail



Similar to Sairset but with increased workability and better bond strength. Can be used as is or thinned with water. Can be used for skim coating. Max service temperature 3200 F.

$62.30 / 55 lb pail

Greenpatch 421 Data PDF


Dry form of Sairset for greater economy.

$50.60 / 55 lb bag



Dry, chemical setting mortar ideal for weatherproof applications such as outdoor ovens and chimneys. Max temp 2700 F.

$98.75 / 50 lb bag


Mortar bag and mortar buckets.


KS-4® Plus

2500° Maximum Service Temperature. Strong, dense, general purpose castable ideal for many applications including furnace linings, special shapes, kiln skews, keys and oven floors. Medium aggregate size. 122 lb/ft3 density.

$41.25 / 55 lb bag

KS-4® Plus Data PDF

Mizzou® Castable Plus

3000° Maximum Service Temperature. High alumina castable. Abrasion resistant with good resistance to numerous slags. Shows expansion rather than shrinkage after heating to elevated temperatures. Good resistance to spalling. 140 lb/ft3 density.

$48.95 / 55 lb bag

Mizzou® Castable Plus Data PDF

KAST-O-LITE® 22 Plus

2200° Temperature Limit. Lightweight castable with low thermal conductivity and good strength. Good all-around backup material. Used for lightweight panel construction, flue and duct linings and complete monolithic linings where there is little or no abrasion.

$51.70 / 55 lb bag

KAST-O-LITE® 22 Plus Data PDF


2600° Temperature Limit. Meets the demands of severe furnace and boiler environments. Suitable for hot face linings, furnace stacks and flues. High strengths reduce cracking from mechanical abuse or steel shell flexing. Low iron content minimizes destructive CO disintegration attack by reducing furnace atmospheres. Lower water content for placement reduces internal steam pressure during initial heat up.

$50.82 / 55 lb bag

KAST-O-LITE® 26 LI Plus Data PDF

Insulating Castable Bag.


RCF Blanket: Durablanket®

Durablanket® refractory ceramic fiber products are high strength, needled insulating blankets that are made from spun ceramic fibers. The extra-long spun fibers, cross locked through a unique forming process, produce a blanket with exceptional handling strength. Blanket products are completely inorganic and available in a variety of temperature grades, densities, and sizes.

1" x 24" wide 8lb | $3.50 / sq ft

Fiberfrax® Blanket and Mat Data PDF

Fiberfrax® RCF and Ceramic Fiber Safety Data Sheet

DuraBlanket Fiber Roll

Non RCF Blanket: Insulfrax®

Insulfrax® S Blanket from Unifrax is their “green” blanket which was developed from a calcium, magnesium, silicate chemistry to provide thermal insulation at continuous operating temperatures up to 2012°F (1100°C). It meets European regulatory requirement (Directive 97/69/EC) and is not classified as Hazardous. Insulfrax S blanket is used in a wide range of applications including refractory linings, thermal insulation, appliances and molten aluminum transfer.

1" x 24" wide 8lb | $4.80 / sq ft

Insulfrax® S Blanket Data PDF

Insulfrax® Safety Data Sheet

Ceramic Fiber Board

Ceramic Fiber Duraboard® and Isaform products are a family of rigid, high temperature ceramic fiber boards manufactured in a wet forming process using Fiberfrax alumina-silica fibers and binders. All board products offer low thermal conductivity, high temperature stability, uniform density, and excellent resistance to thermal shock.

LD Board 2' x 4' x 1" | $61.84 / sheet
Call for price and availability on other sizes.

Fiberfrax® Duraboard® Data PDF

Ceramic Fiberboard

Ceramic Fiber Modules

Modules are available in a wide variety of sizes, densities and fastening hardware system options. Used for roof and walls in reduction kilns. Available by special order only.

Anchor–Loc® Data PDF

Two Ceramic Fiber Modules



Raw material used by artisans or in commercial applications either as a heat resistant layer or as an additive. DO NOT use as a mortar in residential fireplace construction.

$17.36 / 50 lb bag

Fireclay Data PDF

Bag of Fire Clay

Mineral Wool

Lightweight, semi-rigid insulation sheets that are easily cut and fabricated. 8 lb. density. Installed with pins on flat or curved surfaces or as a back-up insulation behind brick or castable. Flexible and compressible.
Rated to 1200°F and available in 24”x48” sheets from 1” to 3” thick.
Also available in loose, bulk form by special order.

1" thick | $4.48 / sheet
1.5" thick | $6.72 / sheet
2" thick | $10.08 / sheet
3" thick | $14.40 / sheet

Mineral Wool 1200 Data PDF

Large piece of Mineral Wool Insulation.

Mineral Wool Block

INSBLOK®-19 is an economical, rigid, high strength mineral wool block with excellent workability. 16 lb. density. Contains an organic binder that will burn out (one time) above approximately 475°F. Used for back-up insulation and not intended for hot face applications.
Rated to 1900°F and available in 12” x 36” sheets.

1" thick | $9.21 / sheet
2" thick | $18.42 / sheet
3" thick | $26.82 / sheet
4" thick | $35.76 / sheet

INSBLOK®-19 Mineral Wool Block Data PDF

Large piece of Mineral Wool Board.