PRO-RED Waterproofing Membrane 963

PRO-RED® Waterproofing Membrane 963

Waterproofing Membrane

C-Cure Pro red 986 waterproofing membrane


PRO-RED® WATERPROOFING MEMBRANE 963 is a ready-to-use, elastomeric, waterproofing and crack prevention membrane for all interior or exterior commercial and residential tile and stone installations.

Easily applied with roller, trowel or sprayer producing a continuous moisture barrier with outstanding adhesion.

Reduces crack transmission in ceramic tile or stone floors.

Meets ANSI A118.10 for waterproofing membranes and ANSI A118.12 for crack isolation membranes.

Meets Uniform Plumbing Code specifications for use as a shower pan liner.

Listed with IAPMO R & T,

File #4244 UPC®. ICC-ES ER-6014. Can also be

used as a slab-on-grade moisture barrier under resilient flooring.

For instructions for use as a slab-on-grade moisture barrier for resilient flooring installations, refer to C-Cure’s technical bulletin #121.


• Convenient — Ready to use

• Apply by roller, trowel or sprayer

• Meets IAPMO specifications for use as a shower pan liner

• Elastomeric — Protects tile from cracking due to minor surface movement


• Concrete

• Cement backerboards, C-Cure® Board 990

• Exterior grade plywood (interior, dry areas for crack isolation only)

• Exterior decks

• Gypsum drywall


Do not apply to surfaces that may go below 40°F (4°C) during the first 72 hours after application, over wet surfaces or surfaces subject to hydrostatic pressure.

Do not use to bridge or cover over existing expansion, control, construction, cold or saw-cut joints.

Not for use as an adhesive. Do not use as a wear surface.

Membrane must be covered with tile or other protective surface.


Meets ANSI A118.10 for load bearing, bonded, waterproof membranes for thin-set ceramic tile and dimensional stone installations.

Meets ANSI A118.12 for crack isolation membranes.

Meets Uniform Plumbing Code specifications for use as a shower pan liner.

Listed with IAPMO R & T, File #4244 UPC®. ICC-ES ER- 6014.

Color — Red.

Texture — Viscous liquid.

C-Cure Pro red 986 waterproofing membrane


5 gallon (18.9 L) and 2 gallon (7.57 L) pails..



All exterior and wet areas are to have proper sloping to drains.

All surfaces must be structurally sound, clean, dry and free from contaminants that would prevent a good bond.

Newly prepared concrete must be cured 28 days, finished with a steel trowel and have a fine broom finish.

Existing surfaces should be scarified, level and all defects repaired.

Cracks in excess of 1/8″ (3 mm) should be treated as expansion joints.


As a Crack Prevention Membrane

Force PRO-RED WATERPROOFING MEMBRANE 963 into cracks with the flat side of the trowel, roller or brush.

Then, using a 3/16″ x 1/4″ (5 x 6 mm) V-notch trowel or 3/8″ (9.5 mm) rough textured roller, apply additional material onto the substrate.

If using a trowel, use the flat side of the trowel and flatten the ridges to form a continuous, even coat of material.

Membrane should extend beyond both sides of the crack a minimum of the diagonal measurement of the tile. Gaps between plywood sheets and where they meet walls should also be pre-filled with membrane. For continuous crack isolation cover the entire substrate with material.

Material should be applied at least 30 mils wet film thickness.

As a Waterproof Membrane

All cracks in concrete up to 1/8″ (3 mm) should be pre-filled with membrane prior to application.

Dampen all porous surfaces. Use a 3/4″ (19 mm) rough textured synthetic roller, or a 3/16″ x 1/4″ (5 x 6 mm) V-notch trowel. Heavily pre-coat corners and where floors and walls meet extending it 6″ (15 cm) on either side.

For exterior change of plane embed 6″ (15 cm) wide fiberglass mesh into the membrane in corners and where floors and walls meet.

If using a trowel, spread the material with trowel held at a 45° angle then flatten the ridges.

If using a roller, apply a continuous, even film with overlapping strokes.

Alternatively, an airless sprayer can be used.

The sprayer should produce between 1900 to 2300 psi, with a flow rate of 1.0 to 1.5 gpm and have a tip orifice size of .025 to .029.

Apply a continuous film with overlapping spray.

Initial membrane appearance is pink when wet and dries to a dark red color.

After the first coat has turned red with no blushing or light pink showing, about 11⁄2 to 2 hours, visually inspect the film for integrity and fill any voids or pinholes with additional material and apply a second coat at right angles to the first.

Periodically check film thickness with a wet film gauge.

The combined dried coating needs to be a minimum of 47 mils thick or 93 mils when wet and should not exceed 125 mils wet film thickness.


Many commercial waterproofing installations require reinforcing of interior change of plane.

Contact Technical Support prior to beginning any commercial installation for review and recommendations.

These installations include but are not limited to the following:

• All above grade pools, fountains and other poured in place or free standing structures that will be required to hold water permanently.

• All commercial floors that will be subject to continuous water exposure (i.e. commercial kitchens, wash downs, periodic flooding, etc.)

• All above grade slabs that are either pre-stressed or post tensioned.

• All perimeters where the floor abuts a curtain or shear wall.

• Around the perimeter of all through floor penetrations (i.e.)


Do not bridge joints which are designed to experience movement.

Carry these types of joints through the tile work.

Clean the joint and install open or closed cell backer rod to the proper depth as outlined in EJ 171 in the TCA Handbook.

Next, compress a sealant as specified by the architect into the joint, coating the sides and leaving it flush with the surface.

After the sealant is dry, place bond breaker tape over joint.

Apply a minimum 3/64″ (1.2 mm) of PRO-RED WATERPROOFING MEMBRANE 963 over the joint and substrate following the instructions detailed in APPLICATION.

Install the tile work onto the membrane but do not bridge the joint. After the tile work is set properly, fill the joint with any specified color sealant, following the architect’s and manufacturer’s instructions.


Drains should have a clamping ring with open weep holes for thin-set application. Apply membrane to the bottom flange.

Drain should be fully supported without movement and even with plane of substrate.

Apply membrane as outlined under APPLICATION. Embed 12″ x 12″ (30 x 30 cm) fiberglass mesh into membrane making sure it does not obstruct the drainage hole.

Then apply an additional coat of membrane and smooth.

After curing, clamp upper flange onto membrane and tighten.

Caulk around flange where membrane and upper flange make contact with a silicone caulk.

A toilet flange can be handled in much the same manner. (See “Drain Cross Section” on back page.)


If tile is not going to be set immediately after curing,

PRO-RED WATERPROOFING MEMBRANE 963 should be protected from rain, direct
sunlight and inclement weather for 72 hours

after application.

If delays longer than 72 hours are expected, cover with felt paper. Care should be taken to prevent membrane from becoming soiled or punctured during and after application.


Install tile or stone with a C-Cure polymer-modified mortar meeting ANSI A118.4 or A118.11 standards.


The product is dry when it turns solid red with no pink showing, normally 11⁄2 to 2 hours.

Depending on ambient conditions, drying time can take up to 12 hours.

A water test can be conducted 72 hours after application if required.


Clean tools and hands with water before material dries.

Clean all spray equipment immediately after use.


2 gallon (7.57 L) pail: 220 sq. ft. (20.4 m2) at 30 mil thickness when wet

5 gallon (18.9 L) pail: 550 sq. ft. (51 m2) at 30 mil thickness when wet

As a Waterproof Membrane

2 gallon (7.57 L) pail: 70 – 80 sq. ft. (6.5 – 7.4 m2) at 93 mil thickness when wet, 47 mils dry

5 gallon (18.9 L) pail: 175 – 200 sq. ft. (16.2 – 18.5 m2) at 93


Keep from freezing.


PRO-RED WATERPROOFING MEMBRANE 963 is included in C-Cure’s Five and Ten Year System Warranties. For terms and conditions see Warranty Documents #WRTDS and #CCW10.


The recommendations, suggestions, statements and technical data are based on the best knowledge available to C-Cure and are given for informational purposes ONLY and without any responsibility for their use.



of the ingredients shall be in accordance with C-Cure specifications. It is expressly understood and agreed that the buyer’s sole and exclusive remedy shall be replacement of defective products and under no circumstances shall C-Cure be liable for incidental or consequential damages.

C-Cure neither assumes nor authorizes any others to assume for it any liability with respect to furnishing of the product.

Handling and use of the product are beyond the control of C-Cure, therefore, no warranty is made, expressed or implied, as to the results obtained from the use of the product or against any claims for infringement of patents resulting from the use of the product.

This writing constitutes a complete and exclusive statement of the understanding between C-Cure and buyer.

There were no oral agreements or warranties, expressed or implied, collateral to or affecting the furnishing of the product.

This understanding shall not be modified except in writing by an officer of C-Cure.


A. Pot Life @ 70°F (21°C)
B. Initial Set, ASTM C191 @ 70°F (21°C)
1 1/2 – 2 Hours
C. Drying Time Before Tile Installation
1 1/2 – 2 Hours or up to 12 Hours
D. Fungus and Micro-Organism Resistance ANSI 118.10 Sect # 4.2
E. Seam Strength width ANSI 118.10 Sect # 4.2
16 lbs./2 inch width (7.3 kg/5 cm)
F. Breaking Strength ANSI 118.10 Sect # 4.3
484 psi (34.0 kg/cm2)
G. Dimensional Stability ANSI 118.10 Sect # 4.4
H. Waterproofness ANSI 118.10 Sect # 4.5
I. Shear Strength 12-Day dry cure ANSI 118.10 Sect # 5.6 

100-Day water immersion ANSI 118.10 Sect # 5.7

267 psi (18.8 kg/cm2) 

89 psi (6.3 kg/cm2)

J. Elongation ASTM D-638 21-Day dry cure 

…………………………………7-Day dry cure/21-Day wet cure



K. Hydrostatic pressure & alkali resistance 

……………………..IAPMO/Uniform Plumbing Code 4244

L. Waterproofness IAPMO/Uniform Plumbing Code 4244
M. FHA 4900-1-615-5, Sections C & D
N. Permeance Rating
0. Water Vapor Transmission
0.02 (grains/hr-sq ft)
N. Conforms to Wisconsin’s performance requirements for “safing material” as required by s. Comm 84.30 (6)(f) 

….of the Wisconsin Administrative Code.

O. Safety—CAUTION: EYE AND SKIN IRRITANT. Avoid contact with eyes. Do not take internally. FIRST AID: In 

case of contact, flush eyes with large amounts of water for at least 15 minutes. Wash affected skin area with

soap and water. If irritation persists, see a physician. If ingested, contact a physician immediately.

For additional information refer to the Material Safety Data Sheet (MSDS).

P. Storage Life—One year if kept in sealed containers at temperatures of 40° to 90° F (4.4° – 32° C).

*These values reflect the results of practical testing methods closely associated with applications in the field.


Drain Cross Section

C-Cure Pro red 986 waterproofing membrane

Pro-Red 963 Anti-Fracture membrane on GYP-CRETE® 2000 Gypsum Underlayment

Gypsum cement floor underlayments and radiant floor heating systems are being specified in multilevel condominiums, hotels and high-rise office buildings in conjunction with ceramic tile and dimensional stone installations.

Past technology did not permit tiles to be installed directly to the surface of a gypsum substrate with Portland cement-based dry set mortars. Advances in gypsum cement floor underlayments, including higher surface hardness and compressive strength (2000 psi or greater), combined with elastomeric membrane technology, allows C-Cure to now recommend tile installations directly over Gyp- Crete 2000. However, these new installation methods require special surface preparation in conjunction with applications utilizing C-Cure’s ProRed 963 Waterproof and Anti-Fracture Membrane.

ProRed 963 will produce a tenacious bond and provide anti-fracture protection for the tile installation. Tile and dimensional stone can be installed over Gyp-Crete 2000 in areas designated as interior, dry, and above grade floors for residential and light commercial traffic. Once the Gyp-Crete 2000 is properly installed and cured in accordance with the manufacturer’s directions, preparation for the installation of ceramic tile may begin.

Surface preparation steps are as follows:


The underlayment must be sufficiently dry and properly cured to the manufacturer’s specifications for permanent, non-moisture permeable coverings.


All surfaces to be tiled must be structurally sound and subject to deflection not to exceed 1/360th of the span. Surfaces shall be dry and free of all grease, oil, dirt, dust, curing compounds, waxes, sealers, efflorescence, old adhesive residue, gypsum-based patching compounds and any other foreign matter.


All gypsum cement underlayment surfaces to receive ProRed 963 must be primed with either properly diluted Maxxon® Overspray or a primer coat consisting of: one (1) part C-Cure’s ProRed 963 Waterproof and Antifracture membrane diluted with four (4) parts clean, cool water. Mix in a clean bucket at low speeds until lump free solution is obtained. The primer can be brushed, rolled or sprayed to achieve an even coat. Apply primer coat to the floor at a rate of 250-300 sq. ft./gallon. Drying time will depend on site conditions but is normally less than one hour. On extremely porous surfaces, two applications may be required.


ProRed 963 can then be applied to the primed gypsum cement underlayment. Refer to ProRed 963 Waterproof and Anti-Fracture Membrane data sheet or packaging directions for application instructions. Expansion joints shall be installed in accordance with local building codes. See EJ 171 in T.C.A. Handbook for detailed specifications. Expansion joints, control joints and cold joints shall never be bridged with setting material.

Notice: The information in this bulletin is presented in good faith, but no warranty, express or implied, is given nor is freedom from any patent in as much as any assistance furnished by C-Cure with reference to the safe use and disposal of its products is provided without charge, C-Cure assumes no obligation or liability therefore, except to the extent that any such assistance shall be given in good faith.

Members of National Tile Contractors Association,

Materials & Methods Standards Association, Ceramic Tile Distributors Association.

NOTICE: The information in this bulletin is presented in good faith, but no warranty, express or implied, is

given nor is freedom from any patent. In as much as any assistance furnished by C-Cure with reference to

the safe use and disposal of its products is provided without charge, C-Cure assumes no obligation or

liability therefore, except to the extent that any such assistance shall be given in good faith.

C-Cure Frequently Asked Questions

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