DISSCO 540 Mastic is a heavy bodied, pliable waterproofing compound of trowel consistency engineered for underground service under extreme conditions. Special additives allow its application in moderately damp conditions and in dusty areas with no decline in waterproofing ability. DISSCO 540 Mastic may be easily applied by either spray or trowel.

DISSCO 540 Mastic is used in residential, commercial and industrial applications where a long lasting, easily applied waterproofing compound is desired.

DISSCO 540 Mastic is designed to be spray applied in coats ranging from 50 to 150 mils per coat. It also can be applied in temperatures down to 0°F with the proper heated spray equipment. DISSCO 540 Mastic may also be applied by hand application with a trowel in coats ranging from 1/8 to 1/4 inch thick.


•Needs no primer
•Readily adheres to damp surfaces
•Eliminates voids

This quick curing mastic can be completely applied in one day. When properly applied, DISSCO 540 Mastic produces a tough, monolithic waterproofing, even on damp or dusty surfaces thanks to special additives.

These properties and ease of application have made DISSCO 540 Mastic a popular choice in mountainous areas where afternoon rains and rough footings make proper caulking and application of sheet materials difficult or impossible. Since DISSCO 540 Mastic is applied directly to footings and walls, there is no opportunity for air to be trapped between the surface and waterproofing materials as can happen with sheet materials.


Originally developed as a tunnel waterproofing, DISSCO 540 Mastic has been in use for over a quarter of a century. This compound has been steadily improved and refined into the PREMIERE WATERPROOFING SYSTEM it is today. With more than 7 million square feet of DISSCO 540 Mastic applied in the Rocky Mountain Region alone, it has established a perfect leak-free record to date.

• Foundation waterproofing below-grade
• Basement mud-slab floor waterproofing
• Masonry block unit waterproofing
• Tunnel waterproofing


DISSCO 540 Mastic is an engineered bituminous product using the finest materials available. DISSCO formulates a specified blend of bituminous materials to produce a product not commonly available in the industry that provides the qualities necessary to produce a waterproofing compound that is superior to all other bituminous products on the market today. This specified blend is then compounded with fast drying carriers, select mineral fillers and special additives that provide the 540 Mastic the strength, body and adhesion qualities required of a premier waterproofing compound.


DISSCO 540 MASTIC is ideal for masonry block projects. The first coat fills all the imperfections, the second coat seals and protects. For these jobs, we recommend masons strike the joints smooth to further seal horizontal and vertical cracks in joints.


To prevent inadvertent damage of the DISSCO 540 Mastic. It is recommended that a protection board (1/4" fan-fold insulation or equivalent) be installed over the finished product. DO NOT use the DISSCO 540 Mastic as an adhesive to install the protection board. Allow the DISSCO 540 Mastic to fully cure (24 hours) prior to installation of the protection course. To prevent puncture of the waterproofed surface when installing the protection course DO NOT DRIVE NAILS THROUGH THE DISSCO 540 MASTIC to adhere the protection board to the coated surface.


For below-grade waterproofing applications the DISSCO 540 Mastic shall be applied in a two coats application. Each coat shall consist of 5 to 6 gallons of material per 100 square feet of surface area to be coated. With a finished two coat dry film thickness of not less than 100 mils. Drying time between coats is 30 minutes minimum. However, the second coat may be applied after the first coat has fully cured.

Coats 2
Gallons per coat per 100 sq. ft. 5 to 6
Finished dry film thickness 100 mils minimum
Drying time between coats 30 minutes

When the DISSCO 540 Mastic is to be spray applied to a rough surface masonry block, it is recommended that the block surface be parged (cement grouted) prior to application to fill possible voids so as to achieve a better seal.

If the rough masonry block IS NOT parged prior to application it is recommended that after the first coat is spray applied as specified above and working in short intervals to prevent premature drying of the first coat it is recommended that first coat be hand brushed into the block surface to ensure that all voids are thoroughly filled in. Then spray apply the second coat as specified above or as necessary to effectively fill the surface.

Color Black
Weight per gallon 8.5 lbs.
Vehicle Solids 60 - 70 %
Volatile vehicle 30 - 40 %
Mineral fiber content 10 - 15 %
Flash point 105° F
Cure time 16 - 24 hrs
Flexibility (1" mandrel) Flexible to 0°F (-15°C)
Slump in 1/8-inch film thickness None
Decrease of film thickness after cure 35% max.
Resistance to hydrostatic head Withstands 20-ft. head

DISSCO 540 MASTIC meets or exceeds specifications:

ASTM D-2822, Federal Spec. SS-R-451
AASHTO M-243-85, Military Spec. MIL-C-82052


The DISSCO 540 Mastic is available in summer and winter grades and is packaged in 5 gallon pails and 55 gallon open top drums.


Contains mineral spirits. Do not use near fire or flame. Use with adequate ventilation. Vapor harmful. Avoid prolonged or repeated contact with skin or breathing of vapor. Close container tightly after each use. Harmful or fatal if swallowed. If swallowed, DO NOT INDUCE VOMITING. Call physician immediately. KEEP OUT OF REACH OF CHILDREN.


DISSCO warrants its products to be free of defects in materials, but makes no warranty as to appearance or color. Since methods of application and on site conditions are beyond our control and can affect performance, DISSCO makes no other warranty, expressed or implied, including warranties of MERCHANTABILITY and FITNESS FOR A PARTICULAR PURPOSE, with respect to DISSCO coatings. DISSCO's sole obligation shall be, at its option, to replace, or to refund the purchase price of, the quantity of DISSCO coating proved to be defective and DISSCO shall not be liable for any loss or damage, including incidental or consequential damages, arising from the use of DISSCO coatings.

In case of an EMERGENCY involving any DISSCO product please call:
Info-Trac @ 1-800-535-5053.

Installation Guidlines

For further information, please contact:

Denver Industrial Sales & Service Company

850 South Lipan Street
Denver, CO 80223
Ph. (303) 935-2485 · Fax (303) 935-6787
Toll Free (877) 935-2485
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