Duro-Last Duro-Guard Sopramastic User Manual

DURO-GUARD® SOPRAMASTIC

1

DESCRIPTION:

Duro-Guard

®

Sopramastic is a black, solvent-based
mastic containing SBS modified bitumen, fibers and
mineral fillers. Sopramastic has been formulated
with a high level of polymer in order to resist flow at
high temperatures and is easily manipulated at
temperatures down to 14° F.

Sopramastic is an ideal complement for the Duro­Guard Sopravap’r when used together to form a
temporary roof assembly. It’s uses include
waterproofing of T joints, transitions and any other
openings within a Sopravap’r temporary roof
assembly.

ORDERING:

Sopramastic is supplied in 10.5-ounce caulk tubes
and can be ordered individually or in cases of 20.

STORAGE AND HANDLING

Product can be stored for up to 12 months in original
sealed containers. Store in a cool, dry area.

Product is flammable. Keep away from open
flames.

PRECAUTIONS:

1. Read Safety Data Sheets (SDS) prior to using.

2. Wear proper personal protective equipment, such

as gloves and eye protection, per the SDS.

3. This product is not intended for use with any

Duro-Last

®

membrane.

INSTALLATION:

1. Limitations

a. The minimum ambient and surface

temperature before application should be
14 F and rising.

b. Apply to a clean and structurally sound

substrate.

2. When Sopravap’r is used as a temporary roof,

apply Sopramastic at all T joints, transitions, and
openings with a standard cartridge extruder gun.
Sopramastic is not required if the Sopravap’r is
immediately covered by a complete roof
assembly. Sopramastic can be applied to

damp surfaces.

TABLE 1. PHYSICAL PROPERTIES

Standards Results

Specific gravity at 68° F - 1.12 kg/L

Color - Black
Application temperature

range
Service temperature
range

Solids by weight - 83%

Set time -

All values are nominal.

2

Meets the requirements of CAN/CGSB-37.5-M89 and ASTM

D4586 standards.

- 14 to 95º F

- -40 to 175º F

Between 4 and 24 hours,

depending on temperature

1, 2

and quantity applied.

CLEANING:

Tools can be cleaned with petroleum solvents such
as mineral spirits, Varsol

™

, xylene, etc. Do not allow
cleaning solvents to come in contact with any Duro­Last membrane.

3. Reference detail drawings for more information.



Duro-Last, Duro-Guard and “World’s Best Roof” are registered marks owned by Duro-Last, Inc.

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Created: 01/23/2014